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Refactor profiling headers

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This commit is contained in:
Yinan Zhang 2019-12-18 15:15:31 -08:00
parent 6342da0970
commit ea42174d07
7 changed files with 80 additions and 59 deletions
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31
src/prof_data.c
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@ -6,6 +6,7 @@
#include "jemalloc/internal/ckh.h"
#include "jemalloc/internal/hash.h"
#include "jemalloc/internal/malloc_io.h"
#include "jemalloc/internal/prof_data_externs.h"
/*
* This file defines and manages the core profiling data structures.
@ -25,6 +26,24 @@
/******************************************************************************/
/*
* Table of mutexes that are shared among gctx's. These are leaf locks, so
* there is no problem with using them for more than one gctx at the same time.
* The primary motivation for this sharing though is that gctx's are ephemeral,
* and destroying mutexes causes complications for systems that allocate when
* creating/destroying mutexes.
*/
malloc_mutex_t *gctx_locks;
static atomic_u_t cum_gctxs; /* Atomic counter. */
/*
* Table of mutexes that are shared among tdata's. No operations require
* holding multiple tdata locks, so there is no problem with using them for more
* than one tdata at the same time, even though a gctx lock may be acquired
* while holding a tdata lock.
*/
malloc_mutex_t *tdata_locks;
/*
* Global hash of (prof_bt_t *)-->(prof_gctx_t *). This is the master data
* structure that knows about all backtraces currently captured.
@ -114,6 +133,18 @@ rb_gen(static UNUSED, tdata_tree_, prof_tdata_tree_t, prof_tdata_t, tdata_link,
/******************************************************************************/
static malloc_mutex_t *
prof_gctx_mutex_choose(void) {
unsigned ngctxs = atomic_fetch_add_u(&cum_gctxs, 1, ATOMIC_RELAXED);
return &gctx_locks[(ngctxs - 1) % PROF_NCTX_LOCKS];
}
static malloc_mutex_t *
prof_tdata_mutex_choose(uint64_t thr_uid) {
return &tdata_locks[thr_uid % PROF_NTDATA_LOCKS];
}
bool
prof_data_init(tsd_t *tsd) {
tdata_tree_new(&tdatas);