project-base/server-skynet-source-3rd-jemalloc
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make jemalloc.c use the emap interface.

Browse Source 
While we're here, we'll also clean up some style nits.
This commit is contained in:
David Goldblatt 2020-02-06 10:59:48 -08:00 committed by David Goldblatt
parent f7d9c6c42d
commit 06e42090f7
2 changed files with 29 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/jemalloc/internal/emap.h
View File

@ -145,4 +145,19 @@ emap_alloc_info_lookup(tsdn_t *tsdn, emap_t *emap, void *ptr,
true, &alloc_ctx->szind, &alloc_ctx->slab);
}
/*
* Fills in alloc_ctx, but only if it can be done easily (i.e. with a hit in the
* L1 rtree cache.
*
* Returns whether or not alloc_ctx was filled in.
*/
JEMALLOC_ALWAYS_INLINE bool
emap_alloc_info_try_lookup_fast(tsd_t *tsd, emap_t *emap, void *ptr,
alloc_ctx_t *alloc_ctx) {
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
bool res = rtree_szind_slab_read_fast(tsd_tsdn(tsd), &emap->rtree,
rtree_ctx, (uintptr_t)ptr, &alloc_ctx->szind, &alloc_ctx->slab);
return res;
}
#endif /* JEMALLOC_INTERNAL_EMAP_H */

33
src/jemalloc.c
View File

@ -2688,26 +2688,24 @@ free_default(void *ptr) {
}
}
/* Returns whether or not the free attempt was successful. */
JEMALLOC_ALWAYS_INLINE
bool free_fastpath(void *ptr, size_t size, bool size_hint) {
tsd_t *tsd = tsd_get(false);
szind_t szind;
alloc_ctx_t alloc_ctx;
if (!size_hint) {
if (unlikely(!tsd || !tsd_fast(tsd))) {
if (unlikely(tsd == NULL || !tsd_fast(tsd))) {
return false;
}
bool slab;
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
bool res = rtree_szind_slab_read_fast(tsd_tsdn(tsd),
&emap_global.rtree, rtree_ctx, (uintptr_t)ptr, &szind,
&slab);
bool res = emap_alloc_info_try_lookup_fast(tsd, &emap_global,
ptr, &alloc_ctx);
/* Note: profiled objects will have alloc_ctx.slab set */
if (unlikely(!res || !slab)) {
if (unlikely(!res || !alloc_ctx.slab)) {
return false;
}
assert(szind != SC_NSIZES);
assert(alloc_ctx.szind != SC_NSIZES);
} else {
/*
* The size hinted fastpath does not involve rtree lookup, thus
@ -2715,7 +2713,7 @@ bool free_fastpath(void *ptr, size_t size, bool size_hint) {
* check to be folded into the branch testing fast_threshold
* (set to 0 when !tsd_fast).
*/
if (unlikely(!tsd)) {
if (unlikely(tsd == NULL)) {
return false;
}
/*
@ -2727,12 +2725,13 @@ bool free_fastpath(void *ptr, size_t size, bool size_hint) {
(config_prof && prof_sample_aligned(ptr)))) {
return false;
}
szind = sz_size2index_lookup(size);
alloc_ctx.szind = sz_size2index_lookup(size);
alloc_ctx.slab = false;
}
uint64_t deallocated, threshold;
te_free_fastpath_ctx(tsd, &deallocated, &threshold, size_hint);
size_t usize = sz_index2size(szind);
size_t usize = sz_index2size(alloc_ctx.szind);
uint64_t deallocated_after = deallocated + usize;
/*
* Check for events and tsd non-nominal (fast_threshold will be set to
@ -2743,7 +2742,7 @@ bool free_fastpath(void *ptr, size_t size, bool size_hint) {
}
tcache_t *tcache = tsd_tcachep_get(tsd);
cache_bin_t *bin = tcache_small_bin_get(tcache, szind);
cache_bin_t *bin = tcache_small_bin_get(tcache, alloc_ctx.szind);
if (!cache_bin_dalloc_easy(bin, ptr)) {
return false;
}
@ -3143,9 +3142,7 @@ do_rallocx(void *ptr, size_t size, int flags, bool is_realloc) {
}
alloc_ctx_t alloc_ctx;
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
rtree_szind_slab_read(tsd_tsdn(tsd), &emap_global.rtree, rtree_ctx,
(uintptr_t)ptr, true, &alloc_ctx.szind, &alloc_ctx.slab);
emap_alloc_info_lookup(tsd_tsdn(tsd), &emap_global, ptr, &alloc_ctx);
assert(alloc_ctx.szind != SC_NSIZES);
old_usize = sz_index2size(alloc_ctx.szind);
assert(old_usize == isalloc(tsd_tsdn(tsd), ptr));
@ -3422,9 +3419,7 @@ je_xallocx(void *ptr, size_t size, size_t extra, int flags) {
edata_t *old_edata = emap_lookup(tsd_tsdn(tsd), &emap_global, ptr);
alloc_ctx_t alloc_ctx;
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
rtree_szind_slab_read(tsd_tsdn(tsd), &emap_global.rtree, rtree_ctx,
(uintptr_t)ptr, true, &alloc_ctx.szind, &alloc_ctx.slab);
emap_alloc_info_lookup(tsd_tsdn(tsd), &emap_global, ptr, &alloc_ctx);
assert(alloc_ctx.szind != SC_NSIZES);
old_usize = sz_index2size(alloc_ctx.szind);
assert(old_usize == isalloc(tsd_tsdn(tsd), ptr));