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Refactor huge allocation to be managed by arenas.

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Refactor huge allocation to be managed by arenas (though the global
red-black tree of huge allocations remains for lookup during
deallocation).  This is the logical conclusion of recent changes that 1)
made per arena dss precedence apply to huge allocation, and 2) made it
possible to replace the per arena chunk allocation/deallocation
functions.

Remove the top level huge stats, and replace them with per arena huge
stats.

Normalize function names and types to *dalloc* (some were *dealloc*).

Remove the --enable-mremap option.  As jemalloc currently operates, this
is a performace regression for some applications, but planned work to
logarithmically space huge size classes should provide similar amortized
performance.  The motivation for this change was that mremap-based huge
reallocation forced leaky abstractions that prevented refactoring.
This commit is contained in:
Jason Evans 2014-05-15 22:22:27 -07:00
parent fb7fe50a88
commit e2deab7a75
28 changed files with 384 additions and 470 deletions
Download patch file Download diff file Expand all files Collapse all files

29
src/stats.c
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@ -213,6 +213,8 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
uint64_t small_nmalloc, small_ndalloc, small_nrequests;
size_t large_allocated;
uint64_t large_nmalloc, large_ndalloc, large_nrequests;
size_t huge_allocated;
uint64_t huge_nmalloc, huge_ndalloc, huge_nrequests;
CTL_GET("arenas.page", &page, size_t);
@ -249,12 +251,19 @@ stats_arena_print(void (*write_cb)(void *, const char *), void *cbopaque,
malloc_cprintf(write_cb, cbopaque,
"large: %12zu %12"PRIu64" %12"PRIu64" %12"PRIu64"\n",
large_allocated, large_nmalloc, large_ndalloc, large_nrequests);
CTL_I_GET("stats.arenas.0.huge.allocated", &huge_allocated, size_t);
CTL_I_GET("stats.arenas.0.huge.nmalloc", &huge_nmalloc, uint64_t);
CTL_I_GET("stats.arenas.0.huge.ndalloc", &huge_ndalloc, uint64_t);
CTL_I_GET("stats.arenas.0.huge.nrequests", &huge_nrequests, uint64_t);
malloc_cprintf(write_cb, cbopaque,
"huge: %12zu %12"PRIu64" %12"PRIu64" %12"PRIu64"\n",
huge_allocated, huge_nmalloc, huge_ndalloc, huge_nrequests);
malloc_cprintf(write_cb, cbopaque,
"total: %12zu %12"PRIu64" %12"PRIu64" %12"PRIu64"\n",
small_allocated + large_allocated,
small_nmalloc + large_nmalloc,
small_ndalloc + large_ndalloc,
small_nrequests + large_nrequests);
small_allocated + large_allocated + huge_allocated,
small_nmalloc + large_nmalloc + huge_nmalloc,
small_ndalloc + large_ndalloc + huge_ndalloc,
small_nrequests + large_nrequests + huge_nrequests);
malloc_cprintf(write_cb, cbopaque, "active: %12zu\n", pactive * page);
CTL_I_GET("stats.arenas.0.mapped", &mapped, size_t);
malloc_cprintf(write_cb, cbopaque, "mapped: %12zu\n", mapped);
@ -458,8 +467,6 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
size_t allocated, active, mapped;
size_t chunks_current, chunks_high;
uint64_t chunks_total;
size_t huge_allocated;
uint64_t huge_nmalloc, huge_ndalloc;
CTL_GET("stats.cactive", &cactive, size_t *);
CTL_GET("stats.allocated", &allocated, size_t);
@ -481,16 +488,6 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
" %13"PRIu64" %12zu %12zu\n",
chunks_total, chunks_high, chunks_current);
/* Print huge stats. */
CTL_GET("stats.huge.nmalloc", &huge_nmalloc, uint64_t);
CTL_GET("stats.huge.ndalloc", &huge_ndalloc, uint64_t);
CTL_GET("stats.huge.allocated", &huge_allocated, size_t);
malloc_cprintf(write_cb, cbopaque,
"huge: nmalloc ndalloc allocated\n");
malloc_cprintf(write_cb, cbopaque,
" %12"PRIu64" %12"PRIu64" %12zu\n",
huge_nmalloc, huge_ndalloc, huge_allocated);
if (merged) {
unsigned narenas;