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

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Small refactors around 7bb05e0.
2021-09-28 04:43:24 +08:00
#ifndef JEMALLOC_INTERNAL_ARENA_STRUCTS_H
#define JEMALLOC_INTERNAL_ARENA_STRUCTS_H
Header refactoring: break out ql.h dependencies
2017-04-11 08:11:33 +08:00
Split up and standardize naming of stats code. The arena-associated stats are now all prefixed with arena_stats_, and live in their own file. Likewise, malloc_bin_stats_t -> bin_stats_t, also in its own file.
2017-11-05 03:50:19 +08:00
#include "jemalloc/internal/arena_stats.h"
Header refactoring: move atomic.h out of the catch-all
2017-04-11 10:04:40 +08:00
#include "jemalloc/internal/atomic.h"
Pull out arena_bin_info_t and arena_bin_t into their own file. In the process, kill arena_bin_index, which is unused. To follow are several diffs continuing this separation.
2017-10-02 08:22:06 +08:00
#include "jemalloc/internal/bin.h"
Header refactoring: bitmap - unify and remove from catchall.
2017-04-21 05:32:24 +08:00
#include "jemalloc/internal/bitmap.h"
Chagne prof_accum_t to counter_accum_t for general purpose.
2020-01-24 05:18:04 +08:00
#include "jemalloc/internal/counter.h"
Extent refactor: Introduce ecache module. This will eventually completely wrap the eset, and handle concurrency, allocation, and deallocation. For now, we only pull out the mutex from the eset.
2019-12-13 08:25:24 +08:00
#include "jemalloc/internal/ecache.h"
Pull out edata_t caching into its own module.
2019-12-12 03:17:19 +08:00
#include "jemalloc/internal/edata_cache.h"
Header refactoring: unify and de-catchall extent_dss.
2017-05-24 05:36:09 +08:00
#include "jemalloc/internal/extent_dss.h"
Header refactoring: size_classes module - remove from the catchall
2017-04-20 06:09:01 +08:00
#include "jemalloc/internal/jemalloc_internal_types.h"
Header refactoring: unify and de-catchall mutex module
2017-05-24 03:28:19 +08:00
#include "jemalloc/internal/mutex.h"
Header refactoring: unify nstime.h and move it out of the catch-all
2017-04-18 07:17:02 +08:00
#include "jemalloc/internal/nstime.h"
PA: Move in the ecache_t objects.
2020-03-09 01:35:56 +08:00
#include "jemalloc/internal/pa.h"
Header refactoring: break out ql.h dependencies
2017-04-11 08:11:33 +08:00
#include "jemalloc/internal/ql.h"
Hide size class computation behind a layer of indirection. This class removes almost all the dependencies on size_classes.h, accessing the data there only via the new module sc.h, which does not depend on any configuration options. In a subsequent commit, we'll remove the configure-time size class computations, doing them at boot time, instead.
2017-12-15 04:46:39 +08:00
#include "jemalloc/internal/sc.h"
Header refactoring: ticker module - remove from the catchall and unify.
2017-04-20 04:39:33 +08:00
#include "jemalloc/internal/ticker.h"
Header refactoring: break out ql.h dependencies
2017-04-11 08:11:33 +08:00
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
struct arena_s {
/*
Disentangle arena and extent locking. Refactor arena and extent locking protocols such that arena and extent locks are never held when calling into the extent_*_wrapper() API. This requires extra care during purging since the arena lock no longer protects the inner purging logic. It also requires extra care to protect extents from being merged with adjacent extents. Convert extent_t's 'active' flag to an enumerated 'state', so that retained extents are explicitly marked as such, rather than depending on ring linkage state. Refactor the extent collections (and their synchronization) for cached and retained extents into extents_t. Incorporate LRU functionality to support purging. Incorporate page count accounting, which replaces arena->ndirty and arena->stats.retained. Assert that no core locks are held when entering any internal [de]allocation functions. This is in addition to existing assertions that no locks are held when entering external [de]allocation functions. Audit and document synchronization protocols for all arena_t fields. This fixes a potential deadlock due to recursive allocation during gdump, in a similar fashion to b49c649bc18fff4bd10a1c8adbaf1f25f6453cb6 (Fix lock order reversal during gdump.), but with a necessarily much broader code impact.
2017-01-30 13:57:14 +08:00
* Number of threads currently assigned to this arena. Each thread has
* two distinct assignments, one for application-serving allocation, and
* the other for internal metadata allocation. Internal metadata must
* not be allocated from arenas explicitly created via the arenas.create
* mallctl, because the arena.<i>.reset mallctl indiscriminately
* discards all allocations for the affected arena.
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
*
* 0: Application allocation.
* 1: Internal metadata allocation.
Disentangle arena and extent locking. Refactor arena and extent locking protocols such that arena and extent locks are never held when calling into the extent_*_wrapper() API. This requires extra care during purging since the arena lock no longer protects the inner purging logic. It also requires extra care to protect extents from being merged with adjacent extents. Convert extent_t's 'active' flag to an enumerated 'state', so that retained extents are explicitly marked as such, rather than depending on ring linkage state. Refactor the extent collections (and their synchronization) for cached and retained extents into extents_t. Incorporate LRU functionality to support purging. Incorporate page count accounting, which replaces arena->ndirty and arena->stats.retained. Assert that no core locks are held when entering any internal [de]allocation functions. This is in addition to existing assertions that no locks are held when entering external [de]allocation functions. Audit and document synchronization protocols for all arena_t fields. This fixes a potential deadlock due to recursive allocation during gdump, in a similar fashion to b49c649bc18fff4bd10a1c8adbaf1f25f6453cb6 (Fix lock order reversal during gdump.), but with a necessarily much broader code impact.
2017-01-30 13:57:14 +08:00
*
* Synchronization: atomic.
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
*/
Transition arena struct fields to C11 atomics
2017-04-05 08:22:24 +08:00
atomic_u_t nthreads[2];
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
Add support for sharded bins within an arena. This makes it possible to have multiple set of bins in an arena, which improves arena scalability because the bins (especially the small ones) are always the limiting factor in production workload. A bin shard is picked on allocation; each extent tracks the bin shard id for deallocation. The shard size will be determined using runtime options.
2018-11-13 07:56:04 +08:00
/* Next bin shard for binding new threads. Synchronization: atomic. */
atomic_u_t binshard_next;
Implement per-CPU arena. The new feature, opt.percpu_arena, determines thread-arena association dynamically based CPU id. Three modes are supported: "percpu", "phycpu" and disabled. "percpu" uses the current core id (with help from sched_getcpu()) directly as the arena index, while "phycpu" will assign threads on the same physical CPU to the same arena. In other words, "percpu" means # of arenas == # of CPUs, while "phycpu" has # of arenas == 1/2 * (# of CPUs). Note that no runtime check on whether hyper threading is enabled is added yet. When enabled, threads will be migrated between arenas when a CPU change is detected. In the current design, to reduce overhead from reading CPU id, each arena tracks the thread accessed most recently. When a new thread comes in, we will read CPU id and update arena if necessary.
2017-02-03 09:02:05 +08:00
/*
* When percpu_arena is enabled, to amortize the cost of reading /
* updating the current CPU id, track the most recent thread accessing
* this arena, and only read CPU if there is a mismatch.
*/
tsdn_t *last_thd;
Convert arena->stats synchronization to atomics.
2017-02-13 09:43:33 +08:00
/* Synchronization: internal. */
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
arena_stats_t stats;
Convert arena->stats synchronization to atomics.
2017-02-13 09:43:33 +08:00
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
/*
Make arena stats collection go through cache bins. This eliminates the need for the arena stats code to "know" about tcaches; all that it needs is a cache_bin_array_descriptor_t to tell it where to find cache_bins whose stats it should aggregate.
2017-08-12 08:34:21 +08:00
* Lists of tcaches and cache_bin_array_descriptors for extant threads
* associated with this arena. Stats from these are merged
* incrementally, and at exit if opt_stats_print is enabled.
Disentangle arena and extent locking. Refactor arena and extent locking protocols such that arena and extent locks are never held when calling into the extent_*_wrapper() API. This requires extra care during purging since the arena lock no longer protects the inner purging logic. It also requires extra care to protect extents from being merged with adjacent extents. Convert extent_t's 'active' flag to an enumerated 'state', so that retained extents are explicitly marked as such, rather than depending on ring linkage state. Refactor the extent collections (and their synchronization) for cached and retained extents into extents_t. Incorporate LRU functionality to support purging. Incorporate page count accounting, which replaces arena->ndirty and arena->stats.retained. Assert that no core locks are held when entering any internal [de]allocation functions. This is in addition to existing assertions that no locks are held when entering external [de]allocation functions. Audit and document synchronization protocols for all arena_t fields. This fixes a potential deadlock due to recursive allocation during gdump, in a similar fashion to b49c649bc18fff4bd10a1c8adbaf1f25f6453cb6 (Fix lock order reversal during gdump.), but with a necessarily much broader code impact.
2017-01-30 13:57:14 +08:00
*
Synchronize arena->tcache_ql with arena->tcache_ql_mtx. This replaces arena->lock synchronization.
2017-02-13 10:50:53 +08:00
* Synchronization: tcache_ql_mtx.
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
*/
Tcache: split up fast and slow path data.
2020-04-08 08:48:35 +08:00
ql_head(tcache_slow_t) tcache_ql;
Make arena stats collection go through cache bins. This eliminates the need for the arena stats code to "know" about tcaches; all that it needs is a cache_bin_array_descriptor_t to tell it where to find cache_bins whose stats it should aggregate.
2017-08-12 08:34:21 +08:00
ql_head(cache_bin_array_descriptor_t) cache_bin_array_descriptor_ql;
malloc_mutex_t tcache_ql_mtx;
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
Transition arena struct fields to C11 atomics
2017-04-05 08:22:24 +08:00
/*
* Represents a dss_prec_t, but atomically.
*
* Synchronization: atomic.
*/
atomic_u_t dss_prec;
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
Disentangle arena and extent locking. Refactor arena and extent locking protocols such that arena and extent locks are never held when calling into the extent_*_wrapper() API. This requires extra care during purging since the arena lock no longer protects the inner purging logic. It also requires extra care to protect extents from being merged with adjacent extents. Convert extent_t's 'active' flag to an enumerated 'state', so that retained extents are explicitly marked as such, rather than depending on ring linkage state. Refactor the extent collections (and their synchronization) for cached and retained extents into extents_t. Incorporate LRU functionality to support purging. Incorporate page count accounting, which replaces arena->ndirty and arena->stats.retained. Assert that no core locks are held when entering any internal [de]allocation functions. This is in addition to existing assertions that no locks are held when entering external [de]allocation functions. Audit and document synchronization protocols for all arena_t fields. This fixes a potential deadlock due to recursive allocation during gdump, in a similar fashion to b49c649bc18fff4bd10a1c8adbaf1f25f6453cb6 (Fix lock order reversal during gdump.), but with a necessarily much broader code impact.
2017-01-30 13:57:14 +08:00
/*
* Extant large allocations.
*
* Synchronization: large_mtx.
*/
Edata: split up different list linkage uses.
2020-06-12 06:15:51 +08:00
edata_list_active_t large;
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
/* Synchronizes all large allocation/update/deallocation. */
malloc_mutex_t large_mtx;
PA: Move in the ecache_t objects.
2020-03-09 01:35:56 +08:00
/* The page-level allocator shard this arena uses. */
pa_shard_t pa_shard;
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
Cache an arena's index in the arena. This saves us a pointer hop down some perf-sensitive paths.
2021-01-30 13:22:57 +08:00
/*
* A cached copy of base->ind. This can get accessed on hot paths;
* looking it up in base requires an extra pointer hop / cache miss.
*/
unsigned ind;
Disentangle arena and extent locking. Refactor arena and extent locking protocols such that arena and extent locks are never held when calling into the extent_*_wrapper() API. This requires extra care during purging since the arena lock no longer protects the inner purging logic. It also requires extra care to protect extents from being merged with adjacent extents. Convert extent_t's 'active' flag to an enumerated 'state', so that retained extents are explicitly marked as such, rather than depending on ring linkage state. Refactor the extent collections (and their synchronization) for cached and retained extents into extents_t. Incorporate LRU functionality to support purging. Incorporate page count accounting, which replaces arena->ndirty and arena->stats.retained. Assert that no core locks are held when entering any internal [de]allocation functions. This is in addition to existing assertions that no locks are held when entering external [de]allocation functions. Audit and document synchronization protocols for all arena_t fields. This fixes a potential deadlock due to recursive allocation during gdump, in a similar fashion to b49c649bc18fff4bd10a1c8adbaf1f25f6453cb6 (Fix lock order reversal during gdump.), but with a necessarily much broader code impact.
2017-01-30 13:57:14 +08:00
/*
* Base allocator, from which arena metadata are allocated.
*
* Synchronization: internal.
*/
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
base_t *base;
Add stats: arena uptime.
2017-05-17 04:56:00 +08:00
/* Used to determine uptime. Read-only after initialization. */
nstime_t create_time;
Arena: share bin offsets in a global. This saves us a cache miss when lookup up the arena bin offset in a remote arena during tcache flush. All arenas share the base offset, and so we don't need to look it up repeatedly for each arena. Secondarily, it shaves 288 bytes off the arena on, e.g., x86-64.
2021-01-31 07:35:33 +08:00
Add arena-level name. An arena-level name can help identify manual arenas.
2022-09-02 07:42:56 +08:00
/* The name of the arena. */
char name[ARENA_NAME_LEN];
Arena: share bin offsets in a global. This saves us a cache miss when lookup up the arena bin offset in a remote arena during tcache flush. All arenas share the base offset, and so we don't need to look it up repeatedly for each arena. Secondarily, it shaves 288 bytes off the arena on, e.g., x86-64.
2021-01-31 07:35:33 +08:00
/*
* The arena is allocated alongside its bins; really this is a
* dynamically sized array determined by the binshard settings.
*/
bin_t bins[0];
Break up headers into constituent parts This is part of a broader change to make header files better represent the dependencies between one another (see https://github.com/jemalloc/jemalloc/issues/533). It breaks up component headers into smaller parts that can be made to have a simpler dependency graph. For the autogenerated headers (smoothstep.h and size_classes.h), no splitting was necessary, so I didn't add support to emit multiple headers.
2017-01-11 10:06:31 +08:00
};
Small refactors around 7bb05e0.
2021-09-28 04:43:24 +08:00
#endif /* JEMALLOC_INTERNAL_ARENA_STRUCTS_H */
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