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server-skynet-source-3rd-je.../include/jemalloc/internal/prof.h

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Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/******************************************************************************/
#ifdef JEMALLOC_H_TYPES
typedef struct prof_bt_s prof_bt_t;
typedef struct prof_cnt_s prof_cnt_t;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
typedef struct prof_tctx_s prof_tctx_t;
typedef struct prof_gctx_s prof_gctx_t;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
typedef struct prof_tdata_s prof_tdata_t;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Implement sampling for heap profiling.
2010-03-02 12:15:26 +08:00
/* Option defaults. */
Avoid a compiler warning. Avoid copying "jeprof" to a 1-byte buffer within prof_boot0() when heap profiling is disabled. Although this is dead code under such conditions, the compiler doesn't figure that part out. Reported by Eduardo Silva.
2014-01-29 15:04:02 +08:00
#ifdef JEMALLOC_PROF
# define PROF_PREFIX_DEFAULT "jeprof"
#else
# define PROF_PREFIX_DEFAULT ""
#endif
Update prof defaults to match common usage. Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB). Change the "opt.prof_accum" default from true to false. Add the "opt.prof_final" mallctl, so that "opt.prof_prefix" need not be abused to disable final profile dumping.
2012-04-18 07:39:33 +08:00
#define LG_PROF_SAMPLE_DEFAULT 19
Disable interval-based profile dumps by default. It is common to have to specify something like JEMALLOC_OPTIONS=F31i, because interval-based dumps are often unuseful or too expensive. Therefore, disable interval-based dumps by default. To get the previous default behavior it is now necessary to specify 31I as part of the options.
2010-10-01 08:10:17 +08:00
#define LG_PROF_INTERVAL_DEFAULT -1
Remove the opt.lg_prof_tcmax option. Remove the opt.lg_prof_tcmax option and hard-code a cache size of 1024. This setting is something that users just shouldn't have to worry about. If lock contention actually ends up being a problem, the simple solution available to the user is to reduce sampling frequency.
2012-02-14 10:04:26 +08:00
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/*
Remove the opt.lg_prof_bt_max option. Remove opt.lg_prof_bt_max, and hard code it to 7. The original intention of this option was to enable faster backtracing by limiting backtrace depth. However, this makes graphical pprof output very difficult to interpret. In practice, decreasing sampling frequency is a better mechanism for limiting profiling overhead.
2012-02-14 10:23:41 +08:00
* Hard limit on stack backtrace depth. The version of prof_backtrace() that
* is based on __builtin_return_address() necessarily has a hard-coded number
* of backtrace frame handlers, and should be kept in sync with this setting.
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
*/
Remove the opt.lg_prof_bt_max option. Remove opt.lg_prof_bt_max, and hard code it to 7. The original intention of this option was to enable faster backtracing by limiting backtrace depth. However, this makes graphical pprof output very difficult to interpret. In practice, decreasing sampling frequency is a better mechanism for limiting profiling overhead.
2012-02-14 10:23:41 +08:00
#define PROF_BT_MAX 128
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/* Initial hash table size. */
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
#define PROF_CKH_MINITEMS 64
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/* Size of memory buffer to use when writing dump files. */
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
#define PROF_DUMP_BUFSIZE 65536
/* Size of stack-allocated buffer used by prof_printf(). */
#define PROF_PRINTF_BUFSIZE 128
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Remove ephemeral mutexes. Remove ephemeral mutexes from the prof machinery, and remove malloc_mutex_destroy(). This simplifies mutex management on systems that call malloc()/free() inside pthread_mutex_{create,destroy}(). Add atomic_*_u() for operation on unsigned values. Fix prof_printf() to call malloc_vsnprintf() rather than malloc_snprintf().
2012-03-24 09:05:51 +08:00
/*
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* Number of mutexes shared among all gctx's. No space is allocated for these
Remove ephemeral mutexes. Remove ephemeral mutexes from the prof machinery, and remove malloc_mutex_destroy(). This simplifies mutex management on systems that call malloc()/free() inside pthread_mutex_{create,destroy}(). Add atomic_*_u() for operation on unsigned values. Fix prof_printf() to call malloc_vsnprintf() rather than malloc_snprintf().
2012-03-24 09:05:51 +08:00
* unless profiling is enabled, so it's okay to over-provision.
*/
#define PROF_NCTX_LOCKS 1024
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/*
* Number of mutexes shared among all tdata's. No space is allocated for these
* unless profiling is enabled, so it's okay to over-provision.
*/
#define PROF_NTDATA_LOCKS 256
Handle prof_tdata resurrection. Handle prof_tdata resurrection during thread shutdown, similarly to how tcache and quarantine handle resurrection.
2012-04-29 09:14:24 +08:00
/*
* prof_tdata pointers close to NULL are used to encode state information that
* is used for cleaning up during thread shutdown.
*/
#define PROF_TDATA_STATE_REINCARNATED ((prof_tdata_t *)(uintptr_t)1)
#define PROF_TDATA_STATE_PURGATORY ((prof_tdata_t *)(uintptr_t)2)
#define PROF_TDATA_STATE_MAX PROF_TDATA_STATE_PURGATORY
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#endif /* JEMALLOC_H_TYPES */
/******************************************************************************/
#ifdef JEMALLOC_H_STRUCTS
struct prof_bt_s {
/* Backtrace, stored as len program counters. */
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
void **vec;
unsigned len;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
};
Various heap profiling improvements. Add the --disable-prof-libgcc configure option, and add backtracing based on libgcc, which is used by default. Fix a bug in hash(). Fix various configuration-dependent compilation errors.
2010-02-11 10:15:53 +08:00
#ifdef JEMALLOC_PROF_LIBGCC
/* Data structure passed to libgcc _Unwind_Backtrace() callback functions. */
typedef struct {
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
prof_bt_t *bt;
unsigned max;
Various heap profiling improvements. Add the --disable-prof-libgcc configure option, and add backtracing based on libgcc, which is used by default. Fix a bug in hash(). Fix various configuration-dependent compilation errors.
2010-02-11 10:15:53 +08:00
} prof_unwind_data_t;
#endif
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
struct prof_cnt_s {
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/* Profiling counters. */
uint64_t curobjs;
uint64_t curbytes;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
uint64_t accumobjs;
uint64_t accumbytes;
};
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
typedef enum {
Fix profile dumping race. Fix a race that caused a non-critical assertion failure. To trigger the race, a thread had to be part way through initializing a new sample, such that it was discoverable by the dumping thread, but not yet linked into its gctx by the time a later dump phase would normally have reset its state to 'nominal'. Additionally, lock access to the state field during modification to transition to the dumping state. It's not apparent that this oversight could have caused an actual problem due to outer locking that protects the dumping machinery, but the added locking pedantically follows the stated locking protocol for the state field.
2014-09-25 13:14:21 +08:00
prof_tctx_state_initializing,
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_tctx_state_nominal,
prof_tctx_state_dumping,
prof_tctx_state_purgatory /* Dumper must finish destroying. */
} prof_tctx_state_t;
Dump heap profile backtraces in a stable order. Also iterate over per thread stats in a stable order, which prepares the way for stable ordering of per thread heap profile dumps.
2014-08-17 03:58:55 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
struct prof_tctx_s {
/* Thread data for thread that performed the allocation. */
prof_tdata_t *tdata;
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
Fix a prof_tctx_t/prof_tdata_t cleanup race. Fix a prof_tctx_t/prof_tdata_t cleanup race by storing a copy of thr_uid in prof_tctx_t, so that the associated tdata need not be present during tctx teardown.
2014-10-13 04:03:20 +08:00
/*
Fix "prof.reset" mallctl-related corruption. Fix heap profiling to distinguish among otherwise identical sample sites with interposed resets (triggered via the "prof.reset" mallctl). This bug could cause data structure corruption that would most likely result in a segfault.
2015-09-10 14:16:10 +08:00
* Copy of tdata->thr_{uid,discrim}, necessary because tdata may be
* defunct during teardown.
Fix a prof_tctx_t/prof_tdata_t cleanup race. Fix a prof_tctx_t/prof_tdata_t cleanup race by storing a copy of thr_uid in prof_tctx_t, so that the associated tdata need not be present during tctx teardown.
2014-10-13 04:03:20 +08:00
*/
uint64_t thr_uid;
Fix "prof.reset" mallctl-related corruption. Fix heap profiling to distinguish among otherwise identical sample sites with interposed resets (triggered via the "prof.reset" mallctl). This bug could cause data structure corruption that would most likely result in a segfault.
2015-09-10 14:16:10 +08:00
uint64_t thr_discrim;
Fix a prof_tctx_t/prof_tdata_t cleanup race. Fix a prof_tctx_t/prof_tdata_t cleanup race by storing a copy of thr_uid in prof_tctx_t, so that the associated tdata need not be present during tctx teardown.
2014-10-13 04:03:20 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/* Profiling counters, protected by tdata->lock. */
prof_cnt_t cnts;
/* Associated global context. */
prof_gctx_t *gctx;
Fix heap profiling regressions. Remove the prof_tctx_state_destroying transitory state and instead add the tctx_uid field, so that the tuple <thr_uid, tctx_uid> uniquely identifies a tctx. This assures that tctx's are well ordered even when more than two with the same thr_uid coexist. A previous attempted fix based on prof_tctx_state_destroying was only sufficient for protecting against two coexisting tctx's, but it also introduced a new dumping race. These regressions were introduced by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.) and 764b00023f2bc97f240c3a758ed23ce9c0ad8526 (Fix a heap profiling regression.).
2015-03-17 06:11:06 +08:00
/*
* UID that distinguishes multiple tctx's created by the same thread,
* but coexisting in gctx->tctxs. There are two ways that such
* coexistence can occur:
* - A dumper thread can cause a tctx to be retained in the purgatory
* state.
* - Although a single "producer" thread must create all tctx's which
* share the same thr_uid, multiple "consumers" can each concurrently
* execute portions of prof_tctx_destroy(). prof_tctx_destroy() only
* gets called once each time cnts.cur{objs,bytes} drop to 0, but this
* threshold can be hit again before the first consumer finishes
* executing prof_tctx_destroy().
*/
uint64_t tctx_uid;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/* Linkage into gctx's tctxs. */
rb_node(prof_tctx_t) tctx_link;
Fix a profile sampling race. Fix a profile sampling race that was due to preparing to sample, yet doing nothing to assure that the context remains valid until the stats are updated. These regressions were caused by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.), which did not make it into any releases prior to these fixes.
2014-09-10 10:37:26 +08:00
/*
* True during prof_alloc_prep()..prof_malloc_sample_object(), prevents
* sample vs destroy race.
*/
bool prepared;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/* Current dump-related state, protected by gctx->lock. */
prof_tctx_state_t state;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/*
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* Copy of cnts snapshotted during early dump phase, protected by
* dump_mtx.
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
*/
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_cnt_t dump_cnts;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
};
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
typedef rb_tree(prof_tctx_t) prof_tctx_tree_t;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
struct prof_gctx_s {
/* Protects nlimbo, cnt_summed, and tctxs. */
Remove ephemeral mutexes. Remove ephemeral mutexes from the prof machinery, and remove malloc_mutex_destroy(). This simplifies mutex management on systems that call malloc()/free() inside pthread_mutex_{create,destroy}(). Add atomic_*_u() for operation on unsigned values. Fix prof_printf() to call malloc_vsnprintf() rather than malloc_snprintf().
2012-03-24 09:05:51 +08:00
malloc_mutex_t *lock;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
/*
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* Number of threads that currently cause this gctx to be in a state of
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
* limbo due to one of:
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* - Initializing this gctx.
* - Initializing per thread counters associated with this gctx.
* - Preparing to destroy this gctx.
* - Dumping a heap profile that includes this gctx.
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
* nlimbo must be 1 (single destroyer) in order to safely destroy the
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* gctx.
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
*/
unsigned nlimbo;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
/*
Dump heap profile backtraces in a stable order. Also iterate over per thread stats in a stable order, which prepares the way for stable ordering of per thread heap profile dumps.
2014-08-17 03:58:55 +08:00
* Tree of profile counters, one for each thread that has allocated in
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
* this context.
*/
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_tctx_tree_t tctxs;
Refactor prof_dump() to reduce contention. Refactor prof_dump() to use a two pass algorithm, and prof_leave() prior to the second pass. This avoids write(2) system calls while holding critical prof resources. Fix prof_dump() to close the dump file descriptor for all relevant error paths. Minimize the size of prof-related static buffers when prof is disabled. This saves roughly 65 KiB of application memory for non-prof builds. Refactor prof_ctx_init() out of prof_lookup_global().
2014-01-17 05:23:56 +08:00
Dump heap profile backtraces in a stable order. Also iterate over per thread stats in a stable order, which prepares the way for stable ordering of per thread heap profile dumps.
2014-08-17 03:58:55 +08:00
/* Linkage for tree of contexts to be dumped. */
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
rb_node(prof_gctx_t) dump_link;
/* Temporary storage for summation during dump. */
prof_cnt_t cnt_summed;
Directly embed prof_ctx_t's bt.
2014-08-16 06:05:12 +08:00
/* Associated backtrace. */
prof_bt_t bt;
/* Backtrace vector, variable size, referred to by bt. */
void *vec[1];
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
};
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
typedef rb_tree(prof_gctx_t) prof_gctx_tree_t;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
struct prof_tdata_s {
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
malloc_mutex_t *lock;
/* Monotonically increasing unique thread identifier. */
uint64_t thr_uid;
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
/*
* Monotonically increasing discriminator among tdata structures
* associated with the same thr_uid.
*/
uint64_t thr_discrim;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/* Included in heap profile dumps if non-NULL. */
char *thread_name;
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
bool attached;
bool expired;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
rb_node(prof_tdata_t) tdata_link;
Fix heap profiling regressions. Remove the prof_tctx_state_destroying transitory state and instead add the tctx_uid field, so that the tuple <thr_uid, tctx_uid> uniquely identifies a tctx. This assures that tctx's are well ordered even when more than two with the same thr_uid coexist. A previous attempted fix based on prof_tctx_state_destroying was only sufficient for protecting against two coexisting tctx's, but it also introduced a new dumping race. These regressions were introduced by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.) and 764b00023f2bc97f240c3a758ed23ce9c0ad8526 (Fix a heap profiling regression.).
2015-03-17 06:11:06 +08:00
/*
* Counter used to initialize prof_tctx_t's tctx_uid. No locking is
* necessary when incrementing this field, because only one thread ever
* does so.
*/
uint64_t tctx_uid_next;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
/*
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* Hash of (prof_bt_t *)-->(prof_tctx_t *). Each thread tracks
Convert prof_tdata_t's bt2cnt to a comprehensive map. Treat prof_tdata_t's bt2cnt as a comprehensive map of the thread's extant allocation samples (do not limit the total number of entries). This helps prepare the way for per thread heap profiling.
2014-08-16 06:01:15 +08:00
* backtraces for which it has non-zero allocation/deallocation counters
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* associated with thread-specific prof_tctx_t objects. Other threads
* may write to prof_tctx_t contents when freeing associated objects.
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
*/
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
ckh_t bt2tctx;
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
/* Sampling state. */
Rename prn to prng. Rename prn to prng so that Windows doesn't choke when trying to create a file named prn.h.
2012-03-03 07:59:45 +08:00
uint64_t prng_state;
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
uint64_t bytes_until_sample;
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
/* State used to avoid dumping while operating on prof internals. */
bool enq;
bool enq_idump;
bool enq_gdump;
Convert prof_tdata_t's bt2cnt to a comprehensive map. Treat prof_tdata_t's bt2cnt as a comprehensive map of the thread's extant allocation samples (do not limit the total number of entries). This helps prepare the way for per thread heap profiling.
2014-08-16 06:01:15 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/*
* Set to true during an early dump phase for tdata's which are
* currently being dumped. New threads' tdata's have this initialized
* to false so that they aren't accidentally included in later dump
* phases.
*/
bool dumping;
/*
* True if profiling is active for this tdata's thread
* (thread.prof.active mallctl).
*/
bool active;
/* Temporary storage for summation during dump. */
prof_cnt_t cnt_summed;
Convert prof_tdata_t's bt2cnt to a comprehensive map. Treat prof_tdata_t's bt2cnt as a comprehensive map of the thread's extant allocation samples (do not limit the total number of entries). This helps prepare the way for per thread heap profiling.
2014-08-16 06:01:15 +08:00
/* Backtrace vector, used for calls to prof_backtrace(). */
void *vec[PROF_BT_MAX];
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
};
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
typedef rb_tree(prof_tdata_t) prof_tdata_tree_t;
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#endif /* JEMALLOC_H_STRUCTS */
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS
extern bool opt_prof;
Add sampling activation/deactivation control. Add the E/e options to control whether the application starts with sampling active/inactive (secondary control to F/f). Add the prof.active mallctl so that the application can activate/deactivate sampling on the fly.
2010-04-01 09:43:24 +08:00
extern bool opt_prof_active;
Implement/test/fix prof-related mallctl's. Implement/test/fix the opt.prof_thread_active_init, prof.thread_active_init, and thread.prof.active mallctl's. Test/fix the thread.prof.name mallctl. Refactor opt_prof_active to be read-only and move mutable state into the prof_active variable. Stop leaning on ctl-related locking for protection.
2014-10-04 14:25:30 +08:00
extern bool opt_prof_thread_active_init;
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
extern size_t opt_lg_prof_sample; /* Mean bytes between samples. */
Make interval-triggered profile dumping optional. Make it possible to disable interval-triggered profile dumping, even if profiling is enabled. This is useful if the user only wants a single dump at exit, or if the application manually triggers profile dumps.
2010-04-01 08:35:51 +08:00
extern ssize_t opt_lg_prof_interval; /* lg(prof_interval). */
Replace JEMALLOC_OPTIONS with MALLOC_CONF. Replace the single-character run-time flags with key/value pairs, which can be set via the malloc_conf global, /etc/malloc.conf, and the MALLOC_CONF environment variable. Replace the JEMALLOC_PROF_PREFIX environment variable with the "opt.prof_prefix" option. Replace umax2s() with u2s().
2010-10-24 09:37:06 +08:00
extern bool opt_prof_gdump; /* High-water memory dumping. */
Update prof defaults to match common usage. Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB). Change the "opt.prof_accum" default from true to false. Add the "opt.prof_final" mallctl, so that "opt.prof_prefix" need not be abused to disable final profile dumping.
2012-04-18 07:39:33 +08:00
extern bool opt_prof_final; /* Final profile dumping. */
Make cumulative heap profile data optional. Add the R option to control whether cumulative heap profile data are maintained. Add the T option to control the size of per thread backtrace caches, primarily because when the R option is specified, backtraces that no longer have allocations associated with them are discarded as soon as no thread caches refer to them.
2010-10-03 06:18:50 +08:00
extern bool opt_prof_leak; /* Dump leak summary at exit. */
extern bool opt_prof_accum; /* Report cumulative bytes. */
Fix a variable prototype/definition mismatch.
2014-01-17 10:04:30 +08:00
extern char opt_prof_prefix[
/* Minimize memory bloat for non-prof builds. */
#ifdef JEMALLOC_PROF
PATH_MAX +
#endif
1];
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Implement/test/fix prof-related mallctl's. Implement/test/fix the opt.prof_thread_active_init, prof.thread_active_init, and thread.prof.active mallctl's. Test/fix the thread.prof.name mallctl. Refactor opt_prof_active to be read-only and move mutable state into the prof_active variable. Stop leaning on ctl-related locking for protection.
2014-10-04 14:25:30 +08:00
/* Accessed via prof_active_[gs]et{_unlocked,}(). */
extern bool prof_active;
Implement the prof.gdump mallctl. This feature makes it possible to toggle the gdump feature on/off during program execution, whereas the the opt.prof_dump mallctl value can only be set during program startup. This resolves #72.
2015-01-26 13:16:57 +08:00
/* Accessed via prof_gdump_[gs]et{_unlocked,}(). */
extern bool prof_gdump_val;
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
/*
* Profile dump interval, measured in bytes allocated. Each arena triggers a
* profile dump when it reaches this threshold. The effect is that the
* interval between profile dumps averages prof_interval, though the actual
* interval between dumps will tend to be sporadic, and the interval will be a
* maximum of approximately (prof_interval * narenas).
*/
extern uint64_t prof_interval;
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
/*
* Initialized as opt_lg_prof_sample, and potentially modified during profiling
* resets.
*/
extern size_t lg_prof_sample;
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
void prof_alloc_rollback(tsd_t *tsd, prof_tctx_t *tctx, bool updated);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
void prof_malloc_sample_object(tsdn_t *tsdn, extent_t *extent,
const void *ptr, size_t usize, prof_tctx_t *tctx);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
void prof_free_sampled_object(tsd_t *tsd, size_t usize, prof_tctx_t *tctx);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
void bt_init(prof_bt_t *bt, void **vec);
Simplify backtracing. Simplify backtracing to not ignore any frames, and compensate for this in pprof in order to increase flexibility with respect to function-based refactoring even in the presence of non-deterministic inlining. Modify pprof to blacklist all jemalloc allocation entry points including non-standard ones like mallocx(), and ignore all allocator-internal frames. Prior to this change, pprof excluded the specifically blacklisted functions from backtraces, but it left allocator-internal frames intact.
2014-04-23 09:41:15 +08:00
void prof_backtrace(prof_bt_t *bt);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_tctx_t *prof_lookup(tsd_t *tsd, prof_bt_t *bt);
Add heap profiling tests. Fix a regression in prof_dump_ctx() due to an uninitized variable. This was caused by revision 4f37ef693e3d5903ce07dc0b61c0da320b35e3d9, so no releases are affected.
2014-01-18 07:40:52 +08:00
#ifdef JEMALLOC_JET
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
size_t prof_tdata_count(void);
Add heap profiling tests. Fix a regression in prof_dump_ctx() due to an uninitized variable. This was caused by revision 4f37ef693e3d5903ce07dc0b61c0da320b35e3d9, so no releases are affected.
2014-01-18 07:40:52 +08:00
size_t prof_bt_count(void);
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
const prof_cnt_t *prof_cnt_all(void);
Add heap profiling tests. Fix a regression in prof_dump_ctx() due to an uninitized variable. This was caused by revision 4f37ef693e3d5903ce07dc0b61c0da320b35e3d9, so no releases are affected.
2014-01-18 07:40:52 +08:00
typedef int (prof_dump_open_t)(bool, const char *);
extern prof_dump_open_t *prof_dump_open;
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
typedef bool (prof_dump_header_t)(tsdn_t *, bool, const prof_cnt_t *);
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
extern prof_dump_header_t *prof_dump_header;
Add heap profiling tests. Fix a regression in prof_dump_ctx() due to an uninitized variable. This was caused by revision 4f37ef693e3d5903ce07dc0b61c0da320b35e3d9, so no releases are affected.
2014-01-18 07:40:52 +08:00
#endif
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
void prof_idump(tsdn_t *tsdn);
Add witness, a simple online locking validator. This resolves #358.
2016-04-14 14:36:15 +08:00
bool prof_mdump(tsd_t *tsd, const char *filename);
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
void prof_gdump(tsdn_t *tsdn);
prof_tdata_t *prof_tdata_init(tsdn_t *tsdn);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_tdata_t *prof_tdata_reinit(tsd_t *tsd, prof_tdata_t *tdata);
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
void prof_reset(tsdn_t *tsdn, size_t lg_sample);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
void prof_tdata_cleanup(tsd_t *tsd);
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
bool prof_active_get(tsdn_t *tsdn);
bool prof_active_set(tsdn_t *tsdn, bool active);
Add witness, a simple online locking validator. This resolves #358.
2016-04-14 14:36:15 +08:00
const char *prof_thread_name_get(tsd_t *tsd);
Implement/test/fix prof-related mallctl's. Implement/test/fix the opt.prof_thread_active_init, prof.thread_active_init, and thread.prof.active mallctl's. Test/fix the thread.prof.name mallctl. Refactor opt_prof_active to be read-only and move mutable state into the prof_active variable. Stop leaning on ctl-related locking for protection.
2014-10-04 14:25:30 +08:00
int prof_thread_name_set(tsd_t *tsd, const char *thread_name);
Add witness, a simple online locking validator. This resolves #358.
2016-04-14 14:36:15 +08:00
bool prof_thread_active_get(tsd_t *tsd);
bool prof_thread_active_set(tsd_t *tsd, bool active);
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
bool prof_thread_active_init_get(tsdn_t *tsdn);
bool prof_thread_active_init_set(tsdn_t *tsdn, bool active_init);
bool prof_gdump_get(tsdn_t *tsdn);
bool prof_gdump_set(tsdn_t *tsdn, bool active);
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
void prof_boot0(void);
Replace JEMALLOC_OPTIONS with MALLOC_CONF. Replace the single-character run-time flags with key/value pairs, which can be set via the malloc_conf global, /etc/malloc.conf, and the MALLOC_CONF environment variable. Replace the JEMALLOC_PROF_PREFIX environment variable with the "opt.prof_prefix" option. Replace umax2s() with u2s().
2010-10-24 09:37:06 +08:00
void prof_boot1(void);
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
bool prof_boot2(tsdn_t *tsdn);
void prof_prefork0(tsdn_t *tsdn);
void prof_prefork1(tsdn_t *tsdn);
void prof_postfork_parent(tsdn_t *tsdn);
void prof_postfork_child(tsdn_t *tsdn);
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
void prof_sample_threshold_update(prof_tdata_t *tdata);
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#endif /* JEMALLOC_H_EXTERNS */
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
#ifndef JEMALLOC_ENABLE_INLINE
Implement/test/fix prof-related mallctl's. Implement/test/fix the opt.prof_thread_active_init, prof.thread_active_init, and thread.prof.active mallctl's. Test/fix the thread.prof.name mallctl. Refactor opt_prof_active to be read-only and move mutable state into the prof_active variable. Stop leaning on ctl-related locking for protection.
2014-10-04 14:25:30 +08:00
bool prof_active_get_unlocked(void);
Implement the prof.gdump mallctl. This feature makes it possible to toggle the gdump feature on/off during program execution, whereas the the opt.prof_dump mallctl value can only be set during program startup. This resolves #72.
2015-01-26 13:16:57 +08:00
bool prof_gdump_get_unlocked(void);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_tdata_t *prof_tdata_get(tsd_t *tsd, bool create);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_tctx_t *prof_tctx_get(tsdn_t *tsdn, const extent_t *extent,
const void *ptr);
void prof_tctx_set(tsdn_t *tsdn, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx);
void prof_tctx_reset(tsdn_t *tsdn, extent_t *extent, const void *ptr,
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
prof_tctx_t *tctx);
bool prof_sample_accum_update(tsd_t *tsd, size_t usize, bool update,
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_tdata_t **tdata_out);
Make one call to prof_active_get_unlocked() per allocation event. Make one call to prof_active_get_unlocked() per allocation event, and use the result throughout the relevant functions that handle an allocation event. Also add a missing check in prof_realloc(). These fixes protect allocation events against concurrent prof_active changes.
2015-09-15 14:17:25 +08:00
prof_tctx_t *prof_alloc_prep(tsd_t *tsd, size_t usize, bool prof_active,
bool update);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
void prof_malloc(tsdn_t *tsdn, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx);
void prof_realloc(tsd_t *tsd, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx, bool prof_active, bool updated,
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
extent_t *old_extent, const void *old_ptr, size_t old_usize,
prof_tctx_t *old_tctx);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
void prof_free(tsd_t *tsd, const extent_t *extent, const void *ptr,
size_t usize);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_PROF_C_))
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE bool
Implement/test/fix prof-related mallctl's. Implement/test/fix the opt.prof_thread_active_init, prof.thread_active_init, and thread.prof.active mallctl's. Test/fix the thread.prof.name mallctl. Refactor opt_prof_active to be read-only and move mutable state into the prof_active variable. Stop leaning on ctl-related locking for protection.
2014-10-04 14:25:30 +08:00
prof_active_get_unlocked(void)
{
/*
* Even if opt_prof is true, sampling can be temporarily disabled by
* setting prof_active to false. No locking is used when reading
* prof_active in the fast path, so there are no guarantees regarding
* how long it will take for all threads to notice state changes.
*/
return (prof_active);
}
Implement the prof.gdump mallctl. This feature makes it possible to toggle the gdump feature on/off during program execution, whereas the the opt.prof_dump mallctl value can only be set during program startup. This resolves #72.
2015-01-26 13:16:57 +08:00
JEMALLOC_ALWAYS_INLINE bool
prof_gdump_get_unlocked(void)
{
/*
* No locking is used when reading prof_gdump_val in the fast path, so
* there are no guarantees regarding how long it will take for all
* threads to notice state changes.
*/
return (prof_gdump_val);
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE prof_tdata_t *
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_tdata_get(tsd_t *tsd, bool create)
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
{
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_tdata_t *tdata;
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
cassert(config_prof);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
tdata = tsd_prof_tdata_get(tsd);
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
if (create) {
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
if (unlikely(tdata == NULL)) {
Fix tsd cleanup regressions. Fix tsd cleanup regressions that were introduced in 5460aa6f6676c7f253bfcb75c028dfd38cae8aaf (Convert all tsd variables to reside in a single tsd structure.). These regressions were twofold: 1) tsd_tryget() should never (and need never) return NULL. Rename it to tsd_fetch() and simplify all callers. 2) tsd_*_set() must only be called when tsd is in the nominal state, because cleanup happens during the nominal-->purgatory transition, and re-initialization must not happen while in the purgatory state. Add tsd_nominal() and use it as needed. Note that tsd_*{p,}_get() can still be used as long as no re-initialization that would require cleanup occurs. This means that e.g. the thread_allocated counter can be updated unconditionally.
2014-10-05 02:12:53 +08:00
if (tsd_nominal(tsd)) {
Resolve bootstrapping issues when embedded in FreeBSD libc. b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online locking validator.) caused a broad propagation of tsd throughout the internal API, but tsd_fetch() was designed to fail prior to tsd bootstrapping. Fix this by splitting tsd_t into non-nullable tsd_t and nullable tsdn_t, and modifying all internal APIs that do not critically rely on tsd to take nullable pointers. Furthermore, add the tsd_booted_get() function so that tsdn_fetch() can probe whether tsd bootstrapping is complete and return NULL if not. All dangerous conversions of nullable pointers are tsdn_tsd() calls that assert-fail on invalid conversion.
2016-05-11 13:21:10 +08:00
tdata = prof_tdata_init(tsd_tsdn(tsd));
Fix tsd cleanup regressions. Fix tsd cleanup regressions that were introduced in 5460aa6f6676c7f253bfcb75c028dfd38cae8aaf (Convert all tsd variables to reside in a single tsd structure.). These regressions were twofold: 1) tsd_tryget() should never (and need never) return NULL. Rename it to tsd_fetch() and simplify all callers. 2) tsd_*_set() must only be called when tsd is in the nominal state, because cleanup happens during the nominal-->purgatory transition, and re-initialization must not happen while in the purgatory state. Add tsd_nominal() and use it as needed. Note that tsd_*{p,}_get() can still be used as long as no re-initialization that would require cleanup occurs. This means that e.g. the thread_allocated counter can be updated unconditionally.
2014-10-05 02:12:53 +08:00
tsd_prof_tdata_set(tsd, tdata);
}
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
} else if (unlikely(tdata->expired)) {
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
tdata = prof_tdata_reinit(tsd, tdata);
tsd_prof_tdata_set(tsd, tdata);
}
Test prof.reset mallctl and fix numerous discovered bugs.
2014-10-03 14:01:10 +08:00
assert(tdata == NULL || tdata->attached);
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
}
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
return (tdata);
Fix heap profiling bugs. Fix a potential deadlock that could occur during interval- and growth-triggered heap profile dumps. Fix an off-by-one heap profile statistics bug that could be observed in interval- and growth-triggered heap profiles. Fix heap profile dump filename sequence numbers (regression during conversion to malloc_snprintf()).
2012-04-23 07:00:11 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE prof_tctx_t *
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_tctx_get(tsdn_t *tsdn, const extent_t *extent, const void *ptr)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
assert(ptr != NULL);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
return (arena_prof_tctx_get(tsdn, extent, ptr));
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE void
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_tctx_set(tsdn_t *tsdn, extent_t *extent, const void *ptr, size_t usize,
prof_tctx_t *tctx)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
assert(ptr != NULL);
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
arena_prof_tctx_set(tsdn, extent, ptr, usize, tctx);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
Resolve an unsupported special case in arena_prof_tctx_set(). Add arena_prof_tctx_reset() and use it instead of arena_prof_tctx_set() when resetting the tctx pointer during reallocation, which happens whenever an originally sampled reallocated object is not sampled during reallocation. This regression was introduced by 594c759f37c301d0245dc2accf4d4aaf9d202819 (Optimize arena_prof_tctx_set().)
2015-09-15 14:48:11 +08:00
JEMALLOC_ALWAYS_INLINE void
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
prof_tctx_reset(tsdn_t *tsdn, extent_t *extent, const void *ptr,
prof_tctx_t *tctx)
Resolve an unsupported special case in arena_prof_tctx_set(). Add arena_prof_tctx_reset() and use it instead of arena_prof_tctx_set() when resetting the tctx pointer during reallocation, which happens whenever an originally sampled reallocated object is not sampled during reallocation. This regression was introduced by 594c759f37c301d0245dc2accf4d4aaf9d202819 (Optimize arena_prof_tctx_set().)
2015-09-15 14:48:11 +08:00
{
cassert(config_prof);
assert(ptr != NULL);
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
arena_prof_tctx_reset(tsdn, extent, ptr, tctx);
Resolve an unsupported special case in arena_prof_tctx_set(). Add arena_prof_tctx_reset() and use it instead of arena_prof_tctx_set() when resetting the tctx pointer during reallocation, which happens whenever an originally sampled reallocated object is not sampled during reallocation. This regression was introduced by 594c759f37c301d0245dc2accf4d4aaf9d202819 (Optimize arena_prof_tctx_set().)
2015-09-15 14:48:11 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE bool
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_sample_accum_update(tsd_t *tsd, size_t usize, bool update,
prof_tdata_t **tdata_out)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_tdata_t *tdata;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
tdata = prof_tdata_get(tsd, true);
Fast-path improvement: reduce # of branches and unnecessary operations. - Combine multiple runtime branches into a single malloc_slow check. - Avoid calling arena_choose / size2index / index2size on fast path. - A few micro optimizations.
2015-10-28 06:12:10 +08:00
if (unlikely((uintptr_t)tdata <= (uintptr_t)PROF_TDATA_STATE_MAX))
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
tdata = NULL;
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
if (tdata_out != NULL)
*tdata_out = tdata;
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
Fast-path improvement: reduce # of branches and unnecessary operations. - Combine multiple runtime branches into a single malloc_slow check. - Avoid calling arena_choose / size2index / index2size on fast path. - A few micro optimizations.
2015-10-28 06:12:10 +08:00
if (unlikely(tdata == NULL))
Fix more prof_tdata resurrection corner cases.
2012-04-29 14:27:13 +08:00
return (true);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Fast-path improvement: reduce # of branches and unnecessary operations. - Combine multiple runtime branches into a single malloc_slow check. - Avoid calling arena_choose / size2index / index2size on fast path. - A few micro optimizations.
2015-10-28 06:12:10 +08:00
if (likely(tdata->bytes_until_sample >= usize)) {
Fix a profile sampling race. Fix a profile sampling race that was due to preparing to sample, yet doing nothing to assure that the context remains valid until the stats are updated. These regressions were caused by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.), which did not make it into any releases prior to these fixes.
2014-09-10 10:37:26 +08:00
if (update)
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
tdata->bytes_until_sample -= usize;
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
return (true);
} else {
Expand a comment regarding geometric sampling.
2011-03-15 13:22:29 +08:00
/* Compute new sample threshold. */
Fix a profile sampling race. Fix a profile sampling race that was due to preparing to sample, yet doing nothing to assure that the context remains valid until the stats are updated. These regressions were caused by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.), which did not make it into any releases prior to these fixes.
2014-09-10 10:37:26 +08:00
if (update)
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
prof_sample_threshold_update(tdata);
Convert to uniform style: cond == false --> !cond
2014-10-04 01:16:09 +08:00
return (!tdata->active);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE prof_tctx_t *
Make one call to prof_active_get_unlocked() per allocation event. Make one call to prof_active_get_unlocked() per allocation event, and use the result throughout the relevant functions that handle an allocation event. Also add a missing check in prof_realloc(). These fixes protect allocation events against concurrent prof_active changes.
2015-09-15 14:17:25 +08:00
prof_alloc_prep(tsd_t *tsd, size_t usize, bool prof_active, bool update)
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
{
prof_tctx_t *ret;
prof_tdata_t *tdata;
prof_bt_t bt;
assert(usize == s2u(usize));
Make one call to prof_active_get_unlocked() per allocation event. Make one call to prof_active_get_unlocked() per allocation event, and use the result throughout the relevant functions that handle an allocation event. Also add a missing check in prof_realloc(). These fixes protect allocation events against concurrent prof_active changes.
2015-09-15 14:17:25 +08:00
if (!prof_active || likely(prof_sample_accum_update(tsd, usize, update,
&tdata)))
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
ret = (prof_tctx_t *)(uintptr_t)1U;
else {
bt_init(&bt, tdata->vec);
prof_backtrace(&bt);
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
ret = prof_lookup(tsd, &bt);
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
}
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
return (ret);
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE void
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_malloc(tsdn_t *tsdn, extent_t *extent, const void *ptr, size_t usize,
prof_tctx_t *tctx)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
assert(ptr != NULL);
Use huge size class infrastructure for large size classes.
2016-05-28 15:17:28 +08:00
assert(usize == isalloc(tsdn, extent, ptr));
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Apply likely()/unlikely() to allocation/deallocation fast paths.
2014-09-12 07:20:44 +08:00
if (unlikely((uintptr_t)tctx > (uintptr_t)1U))
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_malloc_sample_object(tsdn, extent, ptr, usize, tctx);
else {
prof_tctx_set(tsdn, extent, ptr, usize,
(prof_tctx_t *)(uintptr_t)1U);
}
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE void
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_realloc(tsd_t *tsd, extent_t *extent, const void *ptr, size_t usize,
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
prof_tctx_t *tctx, bool prof_active, bool updated, extent_t *old_extent,
const void *old_ptr, size_t old_usize, prof_tctx_t *old_tctx)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
bool sampled, old_sampled, moved;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
assert(ptr != NULL || (uintptr_t)tctx <= (uintptr_t)1U);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Make one call to prof_active_get_unlocked() per allocation event. Make one call to prof_active_get_unlocked() per allocation event, and use the result throughout the relevant functions that handle an allocation event. Also add a missing check in prof_realloc(). These fixes protect allocation events against concurrent prof_active changes.
2015-09-15 14:17:25 +08:00
if (prof_active && !updated && ptr != NULL) {
Use huge size class infrastructure for large size classes.
2016-05-28 15:17:28 +08:00
assert(usize == isalloc(tsd_tsdn(tsd), extent, ptr));
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
if (prof_sample_accum_update(tsd, usize, true, NULL)) {
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
/*
Make one call to prof_active_get_unlocked() per allocation event. Make one call to prof_active_get_unlocked() per allocation event, and use the result throughout the relevant functions that handle an allocation event. Also add a missing check in prof_realloc(). These fixes protect allocation events against concurrent prof_active changes.
2015-09-15 14:17:25 +08:00
* Don't sample. The usize passed to prof_alloc_prep()
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
* was larger than what actually got allocated, so a
* backtrace was captured for this allocation, even
* though its actual usize was insufficient to cross the
* sample threshold.
refactor profiling. only use a bytes till next sample variable.
2014-04-16 04:47:13 +08:00
*/
Add a missing prof_alloc_rollback() call. In the case where prof_alloc_prep() is called with an over-estimate of allocation size, and sampling doesn't end up being triggered, the tctx must be discarded.
2016-06-02 07:17:31 +08:00
prof_alloc_rollback(tsd, tctx, true);
Implement per thread heap profiling. Rename data structures (prof_thr_cnt_t-->prof_tctx_t, prof_ctx_t-->prof_gctx_t), and convert to storing a prof_tctx_t for sampled objects. Convert PROF_ALLOC_PREP() to prof_alloc_prep(), since precise backtrace depth within jemalloc functions is no longer an issue (pprof prunes irrelevant frames). Implement mallctl's: - prof.reset implements full sample data reset, and optional change of sample interval. - prof.lg_sample reads the current sample interval (opt.lg_prof_sample was the permanent source of truth prior to prof.reset). - thread.prof.name provides naming capability for threads within heap profile dumps. - thread.prof.active makes it possible to activate/deactivate heap profiling for individual threads. Modify the heap dump files to contain per thread heap profile data. This change is incompatible with the existing pprof, which will require enhancements to read and process the enriched data.
2014-08-19 07:22:13 +08:00
tctx = (prof_tctx_t *)(uintptr_t)1U;
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
}
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
/*
* The following code must differentiate among eight possible cases,
* based on three boolean conditions.
*/
Fix prof_{malloc,free}_sample_object() call order in prof_realloc(). Fix prof_realloc() to call prof_free_sampled_object() after calling prof_malloc_sample_object(). Prior to this fix, if tctx and old_tctx were the same, the tctx could have been prematurely destroyed.
2015-09-15 14:44:37 +08:00
sampled = ((uintptr_t)tctx > (uintptr_t)1U);
old_sampled = ((uintptr_t)old_tctx > (uintptr_t)1U);
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
moved = (ptr != old_ptr);
/*
* The following block must only execute if this is a non-moving
* reallocation, because for moving reallocation the old allocation will
* be deallocated via a separate call.
*/
if (unlikely(old_sampled) && !moved)
prof_free_sampled_object(tsd, old_usize, old_tctx);
Fix prof_{malloc,free}_sample_object() call order in prof_realloc(). Fix prof_realloc() to call prof_free_sampled_object() after calling prof_malloc_sample_object(). Prior to this fix, if tctx and old_tctx were the same, the tctx could have been prematurely destroyed.
2015-09-15 14:44:37 +08:00
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
if (unlikely(sampled)) {
prof_malloc_sample_object(tsd_tsdn(tsd), extent, ptr, usize,
tctx);
Move slabs out of chunks.
2016-05-30 09:34:50 +08:00
} else if (moved) {
prof_tctx_set(tsd_tsdn(tsd), extent, ptr, usize,
(prof_tctx_t *)(uintptr_t)1U);
} else if (unlikely(old_sampled))
prof_tctx_reset(tsd_tsdn(tsd), extent, ptr, tctx);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
Make prof-related inline functions always-inline.
2014-10-05 02:26:05 +08:00
JEMALLOC_ALWAYS_INLINE void
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_free(tsd_t *tsd, const extent_t *extent, const void *ptr, size_t usize)
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
{
Use rtree-based chunk lookups rather than pointer bit twiddling. Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
2016-03-24 11:29:33 +08:00
prof_tctx_t *tctx = prof_tctx_get(tsd_tsdn(tsd), extent, ptr);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
cassert(config_prof);
Use huge size class infrastructure for large size classes.
2016-05-28 15:17:28 +08:00
assert(usize == isalloc(tsd_tsdn(tsd), extent, ptr));
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
Apply likely()/unlikely() to allocation/deallocation fast paths.
2014-09-12 07:20:44 +08:00
if (unlikely((uintptr_t)tctx > (uintptr_t)1U))
Convert all tsd variables to reside in a single tsd structure.
2014-09-23 12:09:23 +08:00
prof_free_sampled_object(tsd, usize, tctx);
Inline the fast path for heap sampling. Inline the heap sampling code that is executed for every allocation event (regardless of whether a sample is taken). Combine all prof TLS data into a single data structure, in order to reduce the TLS lookup volume.
2010-10-21 10:05:59 +08:00
}
#endif
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#endif /* JEMALLOC_H_INLINES */
/******************************************************************************/
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