diff options
Diffstat (limited to 'test/unit/batch_alloc.c')
| -rw-r--r-- | test/unit/batch_alloc.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/test/unit/batch_alloc.c b/test/unit/batch_alloc.c new file mode 100644 index 0000000..901c52b --- /dev/null +++ b/test/unit/batch_alloc.c @@ -0,0 +1,189 @@ +#include "test/jemalloc_test.h" + +#define BATCH_MAX ((1U << 16) + 1024) +static void *global_ptrs[BATCH_MAX]; + +#define PAGE_ALIGNED(ptr) (((uintptr_t)ptr & PAGE_MASK) == 0) + +static void +verify_batch_basic(tsd_t *tsd, void **ptrs, size_t batch, size_t usize, + bool zero) { + for (size_t i = 0; i < batch; ++i) { + void *p = ptrs[i]; + expect_zu_eq(isalloc(tsd_tsdn(tsd), p), usize, ""); + if (zero) { + for (size_t k = 0; k < usize; ++k) { + expect_true(*((unsigned char *)p + k) == 0, ""); + } + } + } +} + +static void +verify_batch_locality(tsd_t *tsd, void **ptrs, size_t batch, size_t usize, + arena_t *arena, unsigned nregs) { + if (config_prof && opt_prof) { + /* + * Checking batch locality when prof is on is feasible but + * complicated, while checking the non-prof case suffices for + * unit-test purpose. + */ + return; + } + for (size_t i = 0, j = 0; i < batch; ++i, ++j) { + if (j == nregs) { + j = 0; + } + if (j == 0 && batch - i < nregs) { + break; + } + void *p = ptrs[i]; + expect_ptr_eq(iaalloc(tsd_tsdn(tsd), p), arena, ""); + if (j == 0) { + expect_true(PAGE_ALIGNED(p), ""); + continue; + } + assert(i > 0); + void *q = ptrs[i - 1]; + expect_true((uintptr_t)p > (uintptr_t)q + && (size_t)((uintptr_t)p - (uintptr_t)q) == usize, ""); + } +} + +static void +release_batch(void **ptrs, size_t batch, size_t size) { + for (size_t i = 0; i < batch; ++i) { + sdallocx(ptrs[i], size, 0); + } +} + +typedef struct batch_alloc_packet_s batch_alloc_packet_t; +struct batch_alloc_packet_s { + void **ptrs; + size_t num; + size_t size; + int flags; +}; + +static size_t +batch_alloc_wrapper(void **ptrs, size_t num, size_t size, int flags) { + batch_alloc_packet_t batch_alloc_packet = {ptrs, num, size, flags}; + size_t filled; + size_t len = sizeof(size_t); + assert_d_eq(mallctl("experimental.batch_alloc", &filled, &len, + &batch_alloc_packet, sizeof(batch_alloc_packet)), 0, ""); + return filled; +} + +static void +test_wrapper(size_t size, size_t alignment, bool zero, unsigned arena_flag) { + tsd_t *tsd = tsd_fetch(); + assert(tsd != NULL); + const size_t usize = + (alignment != 0 ? sz_sa2u(size, alignment) : sz_s2u(size)); + const szind_t ind = sz_size2index(usize); + const bin_info_t *bin_info = &bin_infos[ind]; + const unsigned nregs = bin_info->nregs; + assert(nregs > 0); + arena_t *arena; + if (arena_flag != 0) { + arena = arena_get(tsd_tsdn(tsd), MALLOCX_ARENA_GET(arena_flag), + false); + } else { + arena = arena_choose(tsd, NULL); + } + assert(arena != NULL); + int flags = arena_flag; + if (alignment != 0) { + flags |= MALLOCX_ALIGN(alignment); + } + if (zero) { + flags |= MALLOCX_ZERO; + } + + /* + * Allocate for the purpose of bootstrapping arena_tdata, so that the + * change in bin stats won't contaminate the stats to be verified below. + */ + void *p = mallocx(size, flags | MALLOCX_TCACHE_NONE); + + for (size_t i = 0; i < 4; ++i) { + size_t base = 0; + if (i == 1) { + base = nregs; + } else if (i == 2) { + base = nregs * 2; + } else if (i == 3) { + base = (1 << 16); + } + for (int j = -1; j <= 1; ++j) { + if (base == 0 && j == -1) { + continue; + } + size_t batch = base + (size_t)j; + assert(batch < BATCH_MAX); + size_t filled = batch_alloc_wrapper(global_ptrs, batch, + size, flags); + assert_zu_eq(filled, batch, ""); + verify_batch_basic(tsd, global_ptrs, batch, usize, + zero); + verify_batch_locality(tsd, global_ptrs, batch, usize, + arena, nregs); + release_batch(global_ptrs, batch, usize); + } + } + + free(p); +} + +TEST_BEGIN(test_batch_alloc) { + test_wrapper(11, 0, false, 0); +} +TEST_END + +TEST_BEGIN(test_batch_alloc_zero) { + test_wrapper(11, 0, true, 0); +} +TEST_END + +TEST_BEGIN(test_batch_alloc_aligned) { + test_wrapper(7, 16, false, 0); +} +TEST_END + +TEST_BEGIN(test_batch_alloc_manual_arena) { + unsigned arena_ind; + size_t len_unsigned = sizeof(unsigned); + assert_d_eq(mallctl("arenas.create", &arena_ind, &len_unsigned, NULL, + 0), 0, ""); + test_wrapper(11, 0, false, MALLOCX_ARENA(arena_ind)); +} +TEST_END + +TEST_BEGIN(test_batch_alloc_large) { + size_t size = SC_LARGE_MINCLASS; + for (size_t batch = 0; batch < 4; ++batch) { + assert(batch < BATCH_MAX); + size_t filled = batch_alloc(global_ptrs, batch, size, 0); + assert_zu_eq(filled, batch, ""); + release_batch(global_ptrs, batch, size); + } + size = tcache_maxclass + 1; + for (size_t batch = 0; batch < 4; ++batch) { + assert(batch < BATCH_MAX); + size_t filled = batch_alloc(global_ptrs, batch, size, 0); + assert_zu_eq(filled, batch, ""); + release_batch(global_ptrs, batch, size); + } +} +TEST_END + +int +main(void) { + return test( + test_batch_alloc, + test_batch_alloc_zero, + test_batch_alloc_aligned, + test_batch_alloc_manual_arena, + test_batch_alloc_large); +} |