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Add extent serial numbers.

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Add extent serial numbers and use them where appropriate as a sort key
that is higher priority than address, so that the allocation policy
prefers older extents.

This resolves #147.
This commit is contained in:
Jason Evans 2016-11-15 13:07:53 -08:00
parent c0a667112c
commit a38acf716e
7 changed files with 126 additions and 35 deletions
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12
src/base.c
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@ -5,6 +5,7 @@
/* Data. */
static malloc_mutex_t base_mtx;
static size_t base_extent_sn_next;
static extent_heap_t base_avail[NSIZES];
static extent_t *base_extents;
static size_t base_allocated;
@ -37,6 +38,14 @@ base_extent_dalloc(tsdn_t *tsdn, extent_t *extent)
base_extents = extent;
}
static void
base_extent_init(extent_t *extent, void *addr, size_t size)
{
size_t sn = atomic_add_zu(&base_extent_sn_next, 1) - 1;
extent_init(extent, NULL, addr, size, 0, sn, true, true, true, false);
}
static extent_t *
base_extent_alloc(tsdn_t *tsdn, size_t minsize)
{
@ -74,7 +83,7 @@ base_extent_alloc(tsdn_t *tsdn, size_t minsize)
base_resident += PAGE_CEILING(nsize);
}
}
extent_init(extent, NULL, addr, esize, 0, true, true, true, false);
base_extent_init(extent, addr, esize);
return (extent);
}
@ -164,6 +173,7 @@ base_boot(void)
if (malloc_mutex_init(&base_mtx, "base", WITNESS_RANK_BASE))
return (true);
base_extent_sn_next = 0;
for (i = 0; i < NSIZES; i++)
extent_heap_new(&base_avail[i]);
base_extents = NULL;