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#include "test/jemalloc_test.h"
/* Config -- "narenas:1,bin_shards:1-160:16|129-512:4|256-256:8" */
#define NTHREADS 16
#define REMOTE_NALLOC 256
static void *
thd_producer(void *varg) {
void **mem = varg;
unsigned arena, i;
size_t sz;
sz = sizeof(arena);
/* Remote arena. */
assert_d_eq(mallctl("arenas.create", (void *)&arena, &sz, NULL, 0), 0,
"Unexpected mallctl() failure");
for (i = 0; i < REMOTE_NALLOC / 2; i++) {
mem[i] = mallocx(1, MALLOCX_TCACHE_NONE | MALLOCX_ARENA(arena));
}
/* Remote bin. */
for (; i < REMOTE_NALLOC; i++) {
mem[i] = mallocx(1, MALLOCX_TCACHE_NONE | MALLOCX_ARENA(0));
}
return NULL;
}
TEST_BEGIN(test_producer_consumer) {
thd_t thds[NTHREADS];
void *mem[NTHREADS][REMOTE_NALLOC];
unsigned i;
/* Create producer threads to allocate. */
for (i = 0; i < NTHREADS; i++) {
thd_create(&thds[i], thd_producer, mem[i]);
}
for (i = 0; i < NTHREADS; i++) {
thd_join(thds[i], NULL);
}
/* Remote deallocation by the current thread. */
for (i = 0; i < NTHREADS; i++) {
for (unsigned j = 0; j < REMOTE_NALLOC; j++) {
assert_ptr_not_null(mem[i][j],
"Unexpected remote allocation failure");
dallocx(mem[i][j], 0);
}
}
}
TEST_END
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) {
test_skip_if(have_percpu_arena &&
PERCPU_ARENA_ENABLED(opt_percpu_arena));
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,
test_producer_consumer);
}
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