81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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#include "test/jemalloc_test.h"
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/* Note that this test relies on the unusual slab sizes set in slab_sizes.sh. */
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TEST_BEGIN(test_slab_sizes) {
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unsigned nbins;
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size_t page;
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size_t sizemib[4];
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size_t slabmib[4];
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size_t len;
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len = sizeof(nbins);
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assert_d_eq(mallctl("arenas.nbins", &nbins, &len, NULL, 0), 0,
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"nbins mallctl failure");
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len = sizeof(page);
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assert_d_eq(mallctl("arenas.page", &page, &len, NULL, 0), 0,
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"page mallctl failure");
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len = 4;
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assert_d_eq(mallctlnametomib("arenas.bin.0.size", sizemib, &len), 0,
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"bin size mallctlnametomib failure");
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len = 4;
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assert_d_eq(mallctlnametomib("arenas.bin.0.slab_size", slabmib, &len),
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0, "slab size mallctlnametomib failure");
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size_t biggest_slab_seen = 0;
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for (unsigned i = 0; i < nbins; i++) {
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size_t bin_size;
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size_t slab_size;
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len = sizeof(size_t);
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sizemib[2] = i;
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slabmib[2] = i;
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assert_d_eq(mallctlbymib(sizemib, 4, (void *)&bin_size, &len,
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NULL, 0), 0, "bin size mallctlbymib failure");
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len = sizeof(size_t);
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assert_d_eq(mallctlbymib(slabmib, 4, (void *)&slab_size, &len,
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NULL, 0), 0, "slab size mallctlbymib failure");
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if (bin_size < 100) {
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/*
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* Then we should be as close to 17 as possible. Since
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* not all page sizes are valid (because of bitmap
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* limitations on the number of items in a slab), we
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* should at least make sure that the number of pages
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* goes up.
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*/
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assert_zu_ge(slab_size, biggest_slab_seen,
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"Slab sizes should go up");
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biggest_slab_seen = slab_size;
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} else if (
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(100 <= bin_size && bin_size < 128)
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|| (128 < bin_size && bin_size <= 200)) {
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assert_zu_eq(slab_size, page,
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"Forced-small slabs should be small");
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} else if (bin_size == 128) {
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assert_zu_eq(slab_size, 2 * page,
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"Forced-2-page slab should be 2 pages");
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} else if (200 < bin_size && bin_size <= 4096) {
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assert_zu_ge(slab_size, biggest_slab_seen,
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"Slab sizes should go up");
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biggest_slab_seen = slab_size;
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}
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}
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/*
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* For any reasonable configuration, 17 pages should be a valid slab
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* size for 4096-byte items.
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*/
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assert_zu_eq(biggest_slab_seen, 17 * page, "Didn't hit page target");
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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_slab_sizes);
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}
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