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#include "test/jemalloc_test.h"
const char *malloc_conf =
/* Use smallest possible chunk size. */
"lg_chunk:0"
/* Immediately purge to minimize fragmentation. */
",lg_dirty_mult:-1"
",decay_time:-1"
;
/*
* Size class that is a divisor of the page size, ideally 4+ regions per run.
*/
#if LG_PAGE <= 14
#define SZ (ZU(1) << (LG_PAGE - 2))
#else
#define SZ 4096
#endif
/*
* Number of chunks to consume at high water mark. Should be at least 2 so that
* if mmap()ed memory grows downward, downward growth of mmap()ed memory is
* tested.
*/
#define NCHUNKS 8
static unsigned
binind_compute(void)
{
size_t sz;
unsigned nbins, i;
sz = sizeof(nbins);
assert_d_eq(mallctl("arenas.nbins", (void *)&nbins, &sz, NULL, 0), 0,
"Unexpected mallctl failure");
for (i = 0; i < nbins; i++) {
size_t mib[4];
size_t miblen = sizeof(mib)/sizeof(size_t);
size_t size;
assert_d_eq(mallctlnametomib("arenas.bin.0.size", mib,
&miblen), 0, "Unexpected mallctlnametomb failure");
mib[2] = (size_t)i;
sz = sizeof(size);
assert_d_eq(mallctlbymib(mib, miblen, (void *)&size, &sz, NULL,
0), 0, "Unexpected mallctlbymib failure");
if (size == SZ)
return (i);
}
test_fail("Unable to compute nregs_per_run");
return (0);
}
static size_t
nregs_per_run_compute(void)
{
uint32_t nregs;
size_t sz;
unsigned binind = binind_compute();
size_t mib[4];
size_t miblen = sizeof(mib)/sizeof(size_t);
assert_d_eq(mallctlnametomib("arenas.bin.0.nregs", mib, &miblen), 0,
"Unexpected mallctlnametomb failure");
mib[2] = (size_t)binind;
sz = sizeof(nregs);
assert_d_eq(mallctlbymib(mib, miblen, (void *)&nregs, &sz, NULL,
0), 0, "Unexpected mallctlbymib failure");
return (nregs);
}
static size_t
npages_per_run_compute(void)
{
size_t sz;
unsigned binind = binind_compute();
size_t mib[4];
size_t miblen = sizeof(mib)/sizeof(size_t);
size_t run_size;
assert_d_eq(mallctlnametomib("arenas.bin.0.run_size", mib, &miblen), 0,
"Unexpected mallctlnametomb failure");
mib[2] = (size_t)binind;
sz = sizeof(run_size);
assert_d_eq(mallctlbymib(mib, miblen, (void *)&run_size, &sz, NULL,
0), 0, "Unexpected mallctlbymib failure");
return (run_size >> LG_PAGE);
}
static size_t
npages_per_chunk_compute(void)
{
return ((chunksize >> LG_PAGE) - map_bias);
}
static size_t
nruns_per_chunk_compute(void)
{
return (npages_per_chunk_compute() / npages_per_run_compute());
}
static unsigned
arenas_extend_mallctl(void)
{
unsigned arena_ind;
size_t sz;
sz = sizeof(arena_ind);
assert_d_eq(mallctl("arenas.extend", (void *)&arena_ind, &sz, NULL, 0),
0, "Error in arenas.extend");
return (arena_ind);
}
static void
arena_reset_mallctl(unsigned arena_ind)
{
size_t mib[3];
size_t miblen = sizeof(mib)/sizeof(size_t);
assert_d_eq(mallctlnametomib("arena.0.reset", mib, &miblen), 0,
"Unexpected mallctlnametomib() failure");
mib[1] = (size_t)arena_ind;
assert_d_eq(mallctlbymib(mib, miblen, NULL, NULL, NULL, 0), 0,
"Unexpected mallctlbymib() failure");
}
TEST_BEGIN(test_pack)
{
unsigned arena_ind = arenas_extend_mallctl();
size_t nregs_per_run = nregs_per_run_compute();
size_t nruns_per_chunk = nruns_per_chunk_compute();
size_t nruns = nruns_per_chunk * NCHUNKS;
size_t nregs = nregs_per_run * nruns;
VARIABLE_ARRAY(void *, ptrs, nregs);
size_t i, j, offset;
/* Fill matrix. */
for (i = offset = 0; i < nruns; i++) {
for (j = 0; j < nregs_per_run; j++) {
void *p = mallocx(SZ, MALLOCX_ARENA(arena_ind) |
MALLOCX_TCACHE_NONE);
assert_ptr_not_null(p,
"Unexpected mallocx(%zu, MALLOCX_ARENA(%u) |"
" MALLOCX_TCACHE_NONE) failure, run=%zu, reg=%zu",
SZ, arena_ind, i, j);
ptrs[(i * nregs_per_run) + j] = p;
}
}
/*
* Free all but one region of each run, but rotate which region is
* preserved, so that subsequent allocations exercise the within-run
* layout policy.
*/
offset = 0;
for (i = offset = 0;
i < nruns;
i++, offset = (offset + 1) % nregs_per_run) {
for (j = 0; j < nregs_per_run; j++) {
void *p = ptrs[(i * nregs_per_run) + j];
if (offset == j)
continue;
dallocx(p, MALLOCX_ARENA(arena_ind) |
MALLOCX_TCACHE_NONE);
}
}
/*
* Logically refill matrix, skipping preserved regions and verifying
* that the matrix is unmodified.
*/
offset = 0;
for (i = offset = 0;
i < nruns;
i++, offset = (offset + 1) % nregs_per_run) {
for (j = 0; j < nregs_per_run; j++) {
void *p;
if (offset == j)
continue;
p = mallocx(SZ, MALLOCX_ARENA(arena_ind) |
MALLOCX_TCACHE_NONE);
assert_ptr_eq(p, ptrs[(i * nregs_per_run) + j],
"Unexpected refill discrepancy, run=%zu, reg=%zu\n",
i, j);
}
}
/* Clean up. */
arena_reset_mallctl(arena_ind);
}
TEST_END
int
main(void)
{
return (test(
test_pack));
}
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