project-base/server-skynet-source-3rd-jemalloc
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Increase default backtrace depth from 4 to 128.

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Increase the default backtrace depth, because shallow backtraces tend to
result in confusing pprof output graphs.
This commit is contained in:
Jason Evans
2010-10-02 22:38:14 -07:00
parent a881cd2c61
commit 588a32cd84
3 changed files with 59 additions and 10 deletions
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11
jemalloc/include/jemalloc/internal/prof.h
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@@ -9,7 +9,7 @@ typedef struct prof_ctx_s prof_ctx_t;
typedef struct prof_tcache_s prof_tcache_t;
/* Option defaults. */
#define LG_PROF_BT_MAX_DEFAULT 2
#define LG_PROF_BT_MAX_DEFAULT 7
#define LG_PROF_SAMPLE_DEFAULT 0
#define LG_PROF_INTERVAL_DEFAULT -1
#define LG_PROF_TCMAX_DEFAULT -1
@@ -17,10 +17,13 @@ typedef struct prof_tcache_s prof_tcache_t;
/*
* Hard limit on stack backtrace depth. Note that the version of
* prof_backtrace() that is based on __builtin_return_address() necessarily has
* a hard-coded number of backtrace frame handlers, so increasing
* LG_PROF_BT_MAX requires changing prof_backtrace().
* a hard-coded number of backtrace frame handlers.
*/
#define LG_PROF_BT_MAX 7 /* >= LG_PROF_BT_MAX_DEFAULT */
#if (defined(JEMALLOC_PROF_LIBGCC) || defined(JEMALLOC_PROF_LIBUNWIND))
# define LG_PROF_BT_MAX ((ZU(1) << (LG_SIZEOF_PTR+3)) - 1)
#else
# define LG_PROF_BT_MAX 7 /* >= LG_PROF_BT_MAX_DEFAULT */
#endif
#define PROF_BT_MAX (1U << LG_PROF_BT_MAX)
/* Initial hash table size. */