1 #include "test/jemalloc_test.h" 2 3 TEST_BEGIN(test_small_extent_size) { 4 unsigned nbins, i; 5 size_t sz, extent_size; 6 size_t mib[4]; 7 size_t miblen = sizeof(mib) / sizeof(size_t); 8 9 /* 10 * Iterate over all small size classes, get their extent sizes, and 11 * verify that the quantized size is the same as the extent size. 12 */ 13 14 sz = sizeof(unsigned); 15 assert_d_eq(mallctl("arenas.nbins", (void *)&nbins, &sz, NULL, 0), 0, 16 "Unexpected mallctl failure"); 17 18 assert_d_eq(mallctlnametomib("arenas.bin.0.slab_size", mib, &miblen), 0, 19 "Unexpected mallctlnametomib failure"); 20 for (i = 0; i < nbins; i++) { 21 mib[2] = i; 22 sz = sizeof(size_t); 23 assert_d_eq(mallctlbymib(mib, miblen, (void *)&extent_size, &sz, 24 NULL, 0), 0, "Unexpected mallctlbymib failure"); 25 assert_zu_eq(extent_size, 26 extent_size_quantize_floor(extent_size), 27 "Small extent quantization should be a no-op " 28 "(extent_size=%zu)", extent_size); 29 assert_zu_eq(extent_size, 30 extent_size_quantize_ceil(extent_size), 31 "Small extent quantization should be a no-op " 32 "(extent_size=%zu)", extent_size); 33 } 34 } 35 TEST_END 36 37 TEST_BEGIN(test_large_extent_size) { 38 bool cache_oblivious; 39 unsigned nlextents, i; 40 size_t sz, extent_size_prev, ceil_prev; 41 size_t mib[4]; 42 size_t miblen = sizeof(mib) / sizeof(size_t); 43 44 /* 45 * Iterate over all large size classes, get their extent sizes, and 46 * verify that the quantized size is the same as the extent size. 47 */ 48 49 sz = sizeof(bool); 50 assert_d_eq(mallctl("config.cache_oblivious", (void *)&cache_oblivious, 51 &sz, NULL, 0), 0, "Unexpected mallctl failure"); 52 53 sz = sizeof(unsigned); 54 assert_d_eq(mallctl("arenas.nlextents", (void *)&nlextents, &sz, NULL, 55 0), 0, "Unexpected mallctl failure"); 56 57 assert_d_eq(mallctlnametomib("arenas.lextent.0.size", mib, &miblen), 0, 58 "Unexpected mallctlnametomib failure"); 59 for (i = 0; i < nlextents; i++) { 60 size_t lextent_size, extent_size, floor, ceil; 61 62 mib[2] = i; 63 sz = sizeof(size_t); 64 assert_d_eq(mallctlbymib(mib, miblen, (void *)&lextent_size, 65 &sz, NULL, 0), 0, "Unexpected mallctlbymib failure"); 66 extent_size = cache_oblivious ? lextent_size + PAGE : 67 lextent_size; 68 floor = extent_size_quantize_floor(extent_size); 69 ceil = extent_size_quantize_ceil(extent_size); 70 71 assert_zu_eq(extent_size, floor, 72 "Extent quantization should be a no-op for precise size " 73 "(lextent_size=%zu, extent_size=%zu)", lextent_size, 74 extent_size); 75 assert_zu_eq(extent_size, ceil, 76 "Extent quantization should be a no-op for precise size " 77 "(lextent_size=%zu, extent_size=%zu)", lextent_size, 78 extent_size); 79 80 if (i > 0) { 81 assert_zu_eq(extent_size_prev, 82 extent_size_quantize_floor(extent_size - PAGE), 83 "Floor should be a precise size"); 84 if (extent_size_prev < ceil_prev) { 85 assert_zu_eq(ceil_prev, extent_size, 86 "Ceiling should be a precise size " 87 "(extent_size_prev=%zu, ceil_prev=%zu, " 88 "extent_size=%zu)", extent_size_prev, 89 ceil_prev, extent_size); 90 } 91 } 92 if (i + 1 < nlextents) { 93 extent_size_prev = floor; 94 ceil_prev = extent_size_quantize_ceil(extent_size + 95 PAGE); 96 } 97 } 98 } 99 TEST_END 100 101 TEST_BEGIN(test_monotonic) { 102 #define SZ_MAX ZU(4 * 1024 * 1024) 103 unsigned i; 104 size_t floor_prev, ceil_prev; 105 106 floor_prev = 0; 107 ceil_prev = 0; 108 for (i = 1; i <= SZ_MAX >> LG_PAGE; i++) { 109 size_t extent_size, floor, ceil; 110 111 extent_size = i << LG_PAGE; 112 floor = extent_size_quantize_floor(extent_size); 113 ceil = extent_size_quantize_ceil(extent_size); 114 115 assert_zu_le(floor, extent_size, 116 "Floor should be <= (floor=%zu, extent_size=%zu, ceil=%zu)", 117 floor, extent_size, ceil); 118 assert_zu_ge(ceil, extent_size, 119 "Ceiling should be >= (floor=%zu, extent_size=%zu, " 120 "ceil=%zu)", floor, extent_size, ceil); 121 122 assert_zu_le(floor_prev, floor, "Floor should be monotonic " 123 "(floor_prev=%zu, floor=%zu, extent_size=%zu, ceil=%zu)", 124 floor_prev, floor, extent_size, ceil); 125 assert_zu_le(ceil_prev, ceil, "Ceiling should be monotonic " 126 "(floor=%zu, extent_size=%zu, ceil_prev=%zu, ceil=%zu)", 127 floor, extent_size, ceil_prev, ceil); 128 129 floor_prev = floor; 130 ceil_prev = ceil; 131 } 132 } 133 TEST_END 134 135 int 136 main(void) { 137 return test( 138 test_small_extent_size, 139 test_large_extent_size, 140 test_monotonic); 141 } 142
