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#include "test/jemalloc_test.h"
/* Config -- "narenas:1,bin_shards:1-160:16|129-512:4|256-256:8" */
static void *
thd_start(void *varg) {
void *ptr, *ptr2;
extent_t *extent;
unsigned shard1, shard2;
tsdn_t *tsdn = tsdn_fetch();
/* Try triggering allocations from sharded bins. */
for (unsigned i = 0; i < 1024; i++) {
ptr = mallocx(1, MALLOCX_TCACHE_NONE);
ptr2 = mallocx(129, MALLOCX_TCACHE_NONE);
extent = iealloc(tsdn, ptr);
shard1 = extent_binshard_get(extent);
dallocx(ptr, 0);
assert_u_lt(shard1, 16, "Unexpected bin shard used");
extent = iealloc(tsdn, ptr2);
shard2 = extent_binshard_get(extent);
dallocx(ptr2, 0);
assert_u_lt(shard2, 4, "Unexpected bin shard used");
if (shard1 > 0 || shard2 > 0) {
/* Triggered sharded bin usage. */
return (void *)(uintptr_t)shard1;
}
}
return NULL;
}
TEST_BEGIN(test_bin_shard_mt) {
#define NTHREADS 16
thd_t thds[NTHREADS];
unsigned i;
for (i = 0; i < NTHREADS; i++) {
thd_create(&thds[i], thd_start, NULL);
}
bool sharded = false;
for (i = 0; i < NTHREADS; i++) {
void *ret;
thd_join(thds[i], &ret);
if (ret != NULL) {
sharded = true;
}
}
assert_b_eq(sharded, true, "Did not find sharded bins");
}
TEST_END
TEST_BEGIN(test_bin_shard) {
unsigned nbins, i;
size_t mib[4], mib2[4];
size_t miblen, miblen2, len;
len = sizeof(nbins);
assert_d_eq(mallctl("arenas.nbins", (void *)&nbins, &len, NULL, 0), 0,
"Unexpected mallctl() failure");
miblen = 4;
assert_d_eq(mallctlnametomib("arenas.bin.0.nshards", mib, &miblen), 0,
"Unexpected mallctlnametomib() failure");
miblen2 = 4;
assert_d_eq(mallctlnametomib("arenas.bin.0.size", mib2, &miblen2), 0,
"Unexpected mallctlnametomib() failure");
for (i = 0; i < nbins; i++) {
uint32_t nshards;
size_t size, sz1, sz2;
mib[2] = i;
sz1 = sizeof(nshards);
assert_d_eq(mallctlbymib(mib, miblen, (void *)&nshards, &sz1,
NULL, 0), 0, "Unexpected mallctlbymib() failure");
mib2[2] = i;
sz2 = sizeof(size);
assert_d_eq(mallctlbymib(mib2, miblen2, (void *)&size, &sz2,
NULL, 0), 0, "Unexpected mallctlbymib() failure");
if (size >= 1 && size <= 128) {
assert_u_eq(nshards, 16, "Unexpected nshards");
} else if (size == 256) {
assert_u_eq(nshards, 8, "Unexpected nshards");
} else if (size > 128 && size <= 512) {
assert_u_eq(nshards, 4, "Unexpected nshards");
} else {
assert_u_eq(nshards, 1, "Unexpected nshards");
}
}
}
TEST_END
int
main(void) {
return test_no_reentrancy(
test_bin_shard,
test_bin_shard_mt);
}
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