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Normalize size classes.

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Normalize size classes to use the same number of size classes per size
doubling (currently hard coded to 4), across the intire range of size
classes.  Small size classes already used this spacing, but in order to
support this change, additional small size classes now fill [4 KiB .. 16
KiB).  Large size classes range from [16 KiB .. 4 MiB).  Huge size
classes now support non-multiples of the chunk size in order to fill (4
MiB .. 16 MiB).
This commit is contained in:
Jason Evans 2014-10-05 17:54:10 -07:00
parent 3c3b3b1a94
commit 155bfa7da1
16 changed files with 558 additions and 475 deletions
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17
test/unit/junk.c
View file

@ -88,7 +88,6 @@ test_junk(size_t sz_min, size_t sz_max)
if (xallocx(s, sz+1, 0, 0) == sz) {
void *junked = (void *)s;
s = (char *)rallocx(s, sz+1, 0);
assert_ptr_not_null((void *)s,
"Unexpected rallocx() failure");
@ -134,13 +133,25 @@ TEST_END
arena_ralloc_junk_large_t *arena_ralloc_junk_large_orig;
static void *most_recently_trimmed;
static size_t
shrink_size(size_t size)
{
size_t shrink_size;
for (shrink_size = size - 1; nallocx(shrink_size, 0) == size;
shrink_size--)
; /* Do nothing. */
return (shrink_size);
}
static void
arena_ralloc_junk_large_intercept(void *ptr, size_t old_usize, size_t usize)
{
arena_ralloc_junk_large_orig(ptr, old_usize, usize);
assert_zu_eq(old_usize, arena_maxclass, "Unexpected old_usize");
assert_zu_eq(usize, arena_maxclass-PAGE, "Unexpected usize");
assert_zu_eq(usize, shrink_size(arena_maxclass), "Unexpected usize");
most_recently_trimmed = ptr;
}
@ -154,7 +165,7 @@ TEST_BEGIN(test_junk_large_ralloc_shrink)
arena_ralloc_junk_large_orig = arena_ralloc_junk_large;
arena_ralloc_junk_large = arena_ralloc_junk_large_intercept;
p2 = rallocx(p1, arena_maxclass-PAGE, 0);
p2 = rallocx(p1, shrink_size(arena_maxclass), 0);
assert_ptr_eq(p1, p2, "Unexpected move during shrink");
arena_ralloc_junk_large = arena_ralloc_junk_large_orig;

2
test/unit/mallctl.c
View file

@ -357,7 +357,7 @@ TEST_BEGIN(test_arenas_lrun_constants)
assert_zu_eq(name, expected, "Incorrect "#name" size"); \
} while (0)
TEST_ARENAS_LRUN_CONSTANT(size_t, size, (1 << LG_PAGE));
TEST_ARENAS_LRUN_CONSTANT(size_t, size, (1 << (LG_PAGE+2)));
#undef TEST_ARENAS_LRUN_CONSTANT
}