142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
#include "test/jemalloc_test.h"
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TEST_BEGIN(test_small_extent_size) {
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unsigned nbins, i;
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size_t sz, extent_size;
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size_t mib[4];
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size_t miblen = sizeof(mib) / sizeof(size_t);
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/*
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* Iterate over all small size classes, get their extent sizes, and
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* verify that the quantized size is the same as the extent size.
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*/
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sz = sizeof(unsigned);
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expect_d_eq(mallctl("arenas.nbins", (void *)&nbins, &sz, NULL, 0), 0,
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"Unexpected mallctl failure");
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expect_d_eq(mallctlnametomib("arenas.bin.0.slab_size", mib, &miblen), 0,
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"Unexpected mallctlnametomib failure");
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for (i = 0; i < nbins; i++) {
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mib[2] = i;
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sz = sizeof(size_t);
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expect_d_eq(mallctlbymib(mib, miblen, (void *)&extent_size, &sz,
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NULL, 0), 0, "Unexpected mallctlbymib failure");
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expect_zu_eq(extent_size,
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sz_psz_quantize_floor(extent_size),
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"Small extent quantization should be a no-op "
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"(extent_size=%zu)", extent_size);
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expect_zu_eq(extent_size,
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sz_psz_quantize_ceil(extent_size),
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"Small extent quantization should be a no-op "
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"(extent_size=%zu)", extent_size);
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}
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}
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TEST_END
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TEST_BEGIN(test_large_extent_size) {
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bool cache_oblivious;
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unsigned nlextents, i;
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size_t sz, extent_size_prev, ceil_prev;
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size_t mib[4];
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size_t miblen = sizeof(mib) / sizeof(size_t);
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/*
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* Iterate over all large size classes, get their extent sizes, and
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* verify that the quantized size is the same as the extent size.
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*/
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sz = sizeof(bool);
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expect_d_eq(mallctl("opt.cache_oblivious", (void *)&cache_oblivious,
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&sz, NULL, 0), 0, "Unexpected mallctl failure");
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sz = sizeof(unsigned);
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expect_d_eq(mallctl("arenas.nlextents", (void *)&nlextents, &sz, NULL,
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0), 0, "Unexpected mallctl failure");
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expect_d_eq(mallctlnametomib("arenas.lextent.0.size", mib, &miblen), 0,
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"Unexpected mallctlnametomib failure");
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for (i = 0; i < nlextents; i++) {
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size_t lextent_size, extent_size, floor, ceil;
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mib[2] = i;
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sz = sizeof(size_t);
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expect_d_eq(mallctlbymib(mib, miblen, (void *)&lextent_size,
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&sz, NULL, 0), 0, "Unexpected mallctlbymib failure");
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extent_size = cache_oblivious ? lextent_size + PAGE :
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lextent_size;
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floor = sz_psz_quantize_floor(extent_size);
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ceil = sz_psz_quantize_ceil(extent_size);
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expect_zu_eq(extent_size, floor,
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"Extent quantization should be a no-op for precise size "
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"(lextent_size=%zu, extent_size=%zu)", lextent_size,
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extent_size);
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expect_zu_eq(extent_size, ceil,
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"Extent quantization should be a no-op for precise size "
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"(lextent_size=%zu, extent_size=%zu)", lextent_size,
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extent_size);
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if (i > 0) {
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expect_zu_eq(extent_size_prev,
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sz_psz_quantize_floor(extent_size - PAGE),
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"Floor should be a precise size");
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if (extent_size_prev < ceil_prev) {
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expect_zu_eq(ceil_prev, extent_size,
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"Ceiling should be a precise size "
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"(extent_size_prev=%zu, ceil_prev=%zu, "
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"extent_size=%zu)", extent_size_prev,
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ceil_prev, extent_size);
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}
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}
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if (i + 1 < nlextents) {
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extent_size_prev = floor;
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ceil_prev = sz_psz_quantize_ceil(extent_size +
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PAGE);
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}
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}
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}
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TEST_END
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TEST_BEGIN(test_monotonic) {
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#define SZ_MAX ZU(4 * 1024 * 1024)
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unsigned i;
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size_t floor_prev, ceil_prev;
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floor_prev = 0;
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ceil_prev = 0;
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for (i = 1; i <= SZ_MAX >> LG_PAGE; i++) {
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size_t extent_size, floor, ceil;
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extent_size = i << LG_PAGE;
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floor = sz_psz_quantize_floor(extent_size);
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ceil = sz_psz_quantize_ceil(extent_size);
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expect_zu_le(floor, extent_size,
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"Floor should be <= (floor=%zu, extent_size=%zu, ceil=%zu)",
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floor, extent_size, ceil);
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expect_zu_ge(ceil, extent_size,
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"Ceiling should be >= (floor=%zu, extent_size=%zu, "
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"ceil=%zu)", floor, extent_size, ceil);
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expect_zu_le(floor_prev, floor, "Floor should be monotonic "
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"(floor_prev=%zu, floor=%zu, extent_size=%zu, ceil=%zu)",
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floor_prev, floor, extent_size, ceil);
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expect_zu_le(ceil_prev, ceil, "Ceiling should be monotonic "
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"(floor=%zu, extent_size=%zu, ceil_prev=%zu, ceil=%zu)",
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floor, extent_size, ceil_prev, ceil);
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floor_prev = floor;
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ceil_prev = ceil;
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}
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}
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TEST_END
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int
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main(void) {
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return test(
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test_small_extent_size,
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test_large_extent_size,
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test_monotonic);
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}
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