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Get rid of witness in malloc_mutex_t when !(configured w/ debug).

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We don't touch witness at all when config_debug == false.  Let's only pay the
memory cost in malloc_mutex_s when needed. Note that when !config_debug, we keep
the field in a union so that we don't have to do #ifdefs in multiple places.
This commit is contained in:
Qi Wang 2017-02-23 14:42:52 -08:00 committed by Qi Wang
parent de49674fbd
commit c2323e13a5
3 changed files with 34 additions and 14 deletions
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16
include/jemalloc/internal/mutex_structs.h
View File

@ -2,6 +2,8 @@
#define JEMALLOC_INTERNAL_MUTEX_STRUCTS_H
struct malloc_mutex_s {
union {
struct {
#ifdef _WIN32
# if _WIN32_WINNT >= 0x0600
SRWLOCK lock;
@ -18,7 +20,21 @@ struct malloc_mutex_s {
#else
pthread_mutex_t lock;
#endif
};
/*
* We only touch witness when configured w/ debug. However we
* keep the field in a union when !debug so that we don't have
* to pollute the code base with #ifdefs, while avoid paying the
* memory cost.
*/
#if !defined(JEMALLOC_DEBUG)
witness_t witness;
#endif
};
#if defined(JEMALLOC_DEBUG)
witness_t witness;
#endif
};
#endif /* JEMALLOC_INTERNAL_MUTEX_STRUCTS_H */

10
include/jemalloc/internal/mutex_types.h
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@ -7,25 +7,25 @@ typedef struct malloc_mutex_s malloc_mutex_t;
# define MALLOC_MUTEX_INITIALIZER
#elif (defined(JEMALLOC_OS_UNFAIR_LOCK))
# define MALLOC_MUTEX_INITIALIZER \
{OS_UNFAIR_LOCK_INIT, WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
{{{OS_UNFAIR_LOCK_INIT}}, WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
#elif (defined(JEMALLOC_OSSPIN))
# define MALLOC_MUTEX_INITIALIZER \
{0, WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
{{{0}}, WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
#elif (defined(JEMALLOC_MUTEX_INIT_CB))
# define MALLOC_MUTEX_INITIALIZER \
{PTHREAD_MUTEX_INITIALIZER, NULL, \
{{{PTHREAD_MUTEX_INITIALIZER, NULL}}, \
WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
#else
# if (defined(JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP) && \
defined(PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP))
# define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_ADAPTIVE_NP
# define MALLOC_MUTEX_INITIALIZER \
{PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP, \
{{{PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP}}, \
WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
# else
# define MALLOC_MUTEX_TYPE PTHREAD_MUTEX_DEFAULT
# define MALLOC_MUTEX_INITIALIZER \
{PTHREAD_MUTEX_INITIALIZER, \
{{{PTHREAD_MUTEX_INITIALIZER}}, \
WITNESS_INITIALIZER("mutex", WITNESS_RANK_OMIT)}
# endif
#endif

4
include/jemalloc/internal/witness_types.h
View File

@ -55,6 +55,10 @@ typedef int witness_comp_t (const witness_t *, void *, const witness_t *,
#define WITNESS_RANK_PROF_NEXT_THR_UID WITNESS_RANK_LEAF
#define WITNESS_RANK_PROF_THREAD_ACTIVE_INIT WITNESS_RANK_LEAF
#if defined(JEMALLOC_DEBUG)
# define WITNESS_INITIALIZER(name, rank) {name, rank, NULL, NULL, {NULL, NULL}}
#else
# define WITNESS_INITIALIZER(name, rank)
#endif
#endif /* JEMALLOC_INTERNAL_WITNESS_TYPES_H */