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Bug 681183 - Make jemalloc_stats.committed meaningful on *nix. r=khuey
This commit is contained in:
Justin Lebar
parent
2e60074c52
commit
254211dda2
@ -698,10 +698,10 @@ struct arena_stats_s {
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uint64_t ndecommit;
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uint64_t ncommit;
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uint64_t decommitted;
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#endif
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/* Current number of committed pages. */
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size_t committed;
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#endif
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/* Per-size-category statistics. */
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size_t allocated_small;
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@ -845,7 +845,7 @@ struct arena_chunk_map_s {
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* -------- -------- -------- ------la
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*/
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size_t bits;
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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#define CHUNK_MAP_DECOMMITTED ((size_t)0x20U)
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#endif
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#define CHUNK_MAP_KEY ((size_t)0x10U)
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@ -1083,7 +1083,7 @@ static char pagefile_templ[PATH_MAX];
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*/
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static void *base_pages;
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static void *base_next_addr;
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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static void *base_next_decommitted;
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#endif
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static void *base_past_addr; /* Addr immediately past base_pages. */
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@ -1091,9 +1091,7 @@ static extent_node_t *base_nodes;
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static malloc_mutex_t base_mtx;
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#ifdef MALLOC_STATS
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static size_t base_mapped;
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# ifdef MALLOC_DECOMMIT
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static size_t base_committed;
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# endif
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#endif
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/********/
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@ -1843,7 +1841,7 @@ base_pages_alloc_mmap(size_t minsize)
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{
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bool ret;
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size_t csize;
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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size_t pminsize;
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#endif
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int pfd;
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@ -1865,19 +1863,19 @@ base_pages_alloc_mmap(size_t minsize)
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}
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base_next_addr = base_pages;
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base_past_addr = (void *)((uintptr_t)base_pages + csize);
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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/*
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* Leave enough pages for minsize committed, since otherwise they would
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* have to be immediately recommitted.
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*/
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pminsize = PAGE_CEILING(minsize);
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base_next_decommitted = (void *)((uintptr_t)base_pages + pminsize);
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# if defined(MALLOC_DECOMMIT)
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if (pminsize < csize)
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pages_decommit(base_next_decommitted, csize - pminsize);
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#endif
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#ifdef MALLOC_STATS
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# endif
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# ifdef MALLOC_STATS
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base_mapped += csize;
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# ifdef MALLOC_DECOMMIT
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base_committed += pminsize;
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# endif
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#endif
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@ -1921,14 +1919,16 @@ base_alloc(size_t size)
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/* Allocate. */
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ret = base_next_addr;
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base_next_addr = (void *)((uintptr_t)base_next_addr + csize);
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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/* Make sure enough pages are committed for the new allocation. */
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if ((uintptr_t)base_next_addr > (uintptr_t)base_next_decommitted) {
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void *pbase_next_addr =
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(void *)(PAGE_CEILING((uintptr_t)base_next_addr));
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# ifdef MALLOC_DECOMMIT
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pages_commit(base_next_decommitted, (uintptr_t)pbase_next_addr -
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(uintptr_t)base_next_decommitted);
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# endif
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base_next_decommitted = pbase_next_addr;
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# ifdef MALLOC_STATS
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base_committed += (uintptr_t)pbase_next_addr -
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@ -3069,7 +3069,7 @@ arena_run_split(arena_t *arena, arena_run_t *run, size_t size, bool large,
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}
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for (i = 0; i < need_pages; i++) {
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#ifdef MALLOC_DECOMMIT
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#if defined(MALLOC_DECOMMIT) || defined(MALLOC_STATS)
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/*
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* Commit decommitted pages if necessary. If a decommitted
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* page is encountered, commit all needed adjacent decommitted
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@ -3090,13 +3090,24 @@ arena_run_split(arena_t *arena, arena_run_t *run, size_t size, bool large,
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CHUNK_MAP_DECOMMITTED;
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}
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# ifdef MALLOC_DECOMMIT
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pages_commit((void *)((uintptr_t)chunk + ((run_ind + i)
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<< pagesize_2pow)), (j << pagesize_2pow));
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# ifdef MALLOC_STATS
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arena->stats.ncommit++;
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# endif
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# endif
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# ifdef MALLOC_STATS
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arena->stats.committed += j;
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# endif
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# ifndef MALLOC_DECOMMIT
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}
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# else
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} else /* No need to zero since commit zeros. */
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# endif
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#endif
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/* Zero if necessary. */
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@ -3169,23 +3180,11 @@ arena_chunk_init(arena_t *arena, arena_chunk_t *chunk)
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pagesize_2pow));
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for (i = 0; i < arena_chunk_header_npages; i++)
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chunk->map[i].bits = 0;
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chunk->map[i].bits = arena_maxclass
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#ifdef MALLOC_DECOMMIT
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| CHUNK_MAP_DECOMMITTED
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#endif
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| CHUNK_MAP_ZEROED;
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chunk->map[i].bits = arena_maxclass | CHUNK_MAP_DECOMMITTED | CHUNK_MAP_ZEROED;
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for (i++; i < chunk_npages-1; i++) {
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chunk->map[i].bits =
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#ifdef MALLOC_DECOMMIT
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CHUNK_MAP_DECOMMITTED |
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#endif
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CHUNK_MAP_ZEROED;
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chunk->map[i].bits = CHUNK_MAP_DECOMMITTED | CHUNK_MAP_ZEROED;
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}
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chunk->map[chunk_npages-1].bits = arena_maxclass
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#ifdef MALLOC_DECOMMIT
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| CHUNK_MAP_DECOMMITTED
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#endif
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| CHUNK_MAP_ZEROED;
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chunk->map[chunk_npages-1].bits = arena_maxclass | CHUNK_MAP_DECOMMITTED | CHUNK_MAP_ZEROED;
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#ifdef MALLOC_DECOMMIT
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/*
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@ -3196,8 +3195,10 @@ arena_chunk_init(arena_t *arena, arena_chunk_t *chunk)
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# ifdef MALLOC_STATS
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arena->stats.ndecommit++;
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arena->stats.decommitted += (chunk_npages - arena_chunk_header_npages);
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arena->stats.committed += arena_chunk_header_npages;
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# endif
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#endif
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#ifdef MALLOC_STATS
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arena->stats.committed += arena_chunk_header_npages;
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#endif
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/* Insert the run into the runs_avail tree. */
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@ -3214,7 +3215,7 @@ arena_chunk_dealloc(arena_t *arena, arena_chunk_t *chunk)
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arena_chunk_tree_dirty_remove(
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&chunk->arena->chunks_dirty, arena->spare);
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arena->ndirty -= arena->spare->ndirty;
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#if (defined(MALLOC_STATS) && defined(MALLOC_DECOMMIT))
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#ifdef MALLOC_STATS
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arena->stats.committed -= arena->spare->ndirty;
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#endif
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}
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@ -3222,9 +3223,7 @@ arena_chunk_dealloc(arena_t *arena, arena_chunk_t *chunk)
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chunk_dealloc((void *)arena->spare, chunksize);
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#ifdef MALLOC_STATS
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arena->stats.mapped -= chunksize;
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# ifdef MALLOC_DECOMMIT
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arena->stats.committed -= arena_chunk_header_npages;
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# endif
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#endif
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}
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@ -3330,29 +3329,17 @@ arena_purge(arena_t *arena)
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assert(i >= arena_chunk_header_npages);
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if (chunk->map[i].bits & CHUNK_MAP_DIRTY) {
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#ifdef MALLOC_DECOMMIT
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assert((chunk->map[i].bits &
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CHUNK_MAP_DECOMMITTED) == 0);
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#endif
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chunk->map[i].bits ^=
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#ifdef MALLOC_DECOMMIT
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CHUNK_MAP_DECOMMITTED |
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#endif
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CHUNK_MAP_DIRTY;
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chunk->map[i].bits ^= CHUNK_MAP_DECOMMITTED | CHUNK_MAP_DIRTY;
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/* Find adjacent dirty run(s). */
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for (npages = 1; i > arena_chunk_header_npages
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&& (chunk->map[i - 1].bits &
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CHUNK_MAP_DIRTY); npages++) {
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i--;
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#ifdef MALLOC_DECOMMIT
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assert((chunk->map[i].bits &
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CHUNK_MAP_DECOMMITTED) == 0);
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#endif
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chunk->map[i].bits ^=
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#ifdef MALLOC_DECOMMIT
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CHUNK_MAP_DECOMMITTED |
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#endif
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CHUNK_MAP_DIRTY;
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chunk->map[i].bits ^= CHUNK_MAP_DECOMMITTED | CHUNK_MAP_DIRTY;
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}
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chunk->ndirty -= npages;
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arena->ndirty -= npages;
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@ -3364,9 +3351,13 @@ arena_purge(arena_t *arena)
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# ifdef MALLOC_STATS
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arena->stats.ndecommit++;
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arena->stats.decommitted += npages;
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arena->stats.committed -= npages;
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# endif
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#else
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#endif
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#ifdef MALLOC_STATS
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arena->stats.committed -= npages;
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#endif
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#ifndef MALLOC_DECOMMIT
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madvise((void *)((uintptr_t)chunk + (i <<
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pagesize_2pow)), (npages << pagesize_2pow),
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MADV_FREE);
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@ -5707,9 +5698,7 @@ MALLOC_OUT:
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/* Initialize base allocation data structures. */
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#ifdef MALLOC_STATS
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base_mapped = 0;
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# ifdef MALLOC_DECOMMIT
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base_committed = 0;
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# endif
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#endif
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base_nodes = NULL;
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malloc_mutex_init(&base_mtx);
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@ -6363,19 +6352,15 @@ jemalloc_stats(jemalloc_stats_t *stats)
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/* Get huge mapped/allocated. */
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malloc_mutex_lock(&huge_mtx);
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stats->mapped += stats_chunks.curchunks * chunksize;
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#ifdef MALLOC_DECOMMIT
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stats->committed += huge_allocated;
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#endif
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stats->allocated += huge_allocated;
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malloc_mutex_unlock(&huge_mtx);
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/* Get base mapped. */
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malloc_mutex_lock(&base_mtx);
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stats->mapped += base_mapped;
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#ifdef MALLOC_DECOMMIT
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assert(base_committed <= base_mapped);
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stats->committed += base_committed;
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#endif
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malloc_mutex_unlock(&base_mtx);
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/* Iterate over arenas and their chunks. */
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@ -6385,18 +6370,13 @@ jemalloc_stats(jemalloc_stats_t *stats)
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malloc_spin_lock(&arena->lock);
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stats->allocated += arena->stats.allocated_small;
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stats->allocated += arena->stats.allocated_large;
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#ifdef MALLOC_DECOMMIT
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stats->committed += (arena->stats.committed <<
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pagesize_2pow);
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#endif
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stats->dirty += (arena->ndirty << pagesize_2pow);
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malloc_spin_unlock(&arena->lock);
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}
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}
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#ifndef MALLOC_DECOMMIT
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stats->committed = stats->mapped;
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#endif
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assert(stats->mapped >= stats->committed);
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assert(stats->committed >= stats->allocated);
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}
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@ -436,19 +436,8 @@ nsMemoryReporterManager::Init()
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REGISTER(Private);
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#endif
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#if defined(HAVE_JEMALLOC_STATS) && defined(XP_WIN)
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// heap-committed is only meaningful where we have MALLOC_DECOMMIT defined
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// (currently, just on Windows). Elsewhere, it's the same as
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// stats->mapped, which is heap-allocated + heap-unallocated.
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//
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// Ideally, we'd check for MALLOC_DECOMMIT in the #if defined above, but
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// MALLOC_DECOMMIT is defined in jemalloc.c, not a header, so we'll just
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// have to settle for the OS check for now.
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REGISTER(HeapCommitted);
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#endif
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#if defined(HAVE_JEMALLOC_STATS)
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REGISTER(HeapCommitted);
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REGISTER(HeapDirty);
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#elif defined(XP_MACOSX) && !defined(MOZ_MEMORY)
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REGISTER(HeapZone0Committed);
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