hpa_thp_always.c revision 1.1.1.1
1 #include "test/jemalloc_test.h" 2 3 #include "jemalloc/internal/hpa.h" 4 #include "jemalloc/internal/nstime.h" 5 6 #define SHARD_IND 111 7 8 #define ALLOC_MAX (HUGEPAGE) 9 10 typedef struct test_data_s test_data_t; 11 struct test_data_s { 12 /* 13 * Must be the first member -- we convert back and forth between the 14 * test_data_t and the hpa_shard_t; 15 */ 16 hpa_shard_t shard; 17 hpa_central_t central; 18 base_t *base; 19 edata_cache_t shard_edata_cache; 20 21 emap_t emap; 22 }; 23 24 static hpa_shard_opts_t test_hpa_shard_opts_aggressive = { 25 /* slab_max_alloc */ 26 HUGEPAGE, 27 /* hugification_threshold */ 28 0.9 * HUGEPAGE, 29 /* dirty_mult */ 30 FXP_INIT_PERCENT(11), 31 /* deferral_allowed */ 32 true, 33 /* hugify_delay_ms */ 34 0, 35 /* hugify_sync */ 36 false, 37 /* min_purge_interval_ms */ 38 5, 39 /* experimental_max_purge_nhp */ 40 -1, 41 /* purge_threshold */ 42 HUGEPAGE - 5 * PAGE, 43 /* min_purge_delay_ms */ 44 10, 45 /* hugify_style */ 46 hpa_hugify_style_eager}; 47 48 static hpa_shard_t * 49 create_test_data(const hpa_hooks_t *hooks, hpa_shard_opts_t *opts) { 50 bool err; 51 base_t *base = base_new(TSDN_NULL, /* ind */ SHARD_IND, 52 &ehooks_default_extent_hooks, /* metadata_use_hooks */ true); 53 assert_ptr_not_null(base, ""); 54 55 test_data_t *test_data = malloc(sizeof(test_data_t)); 56 assert_ptr_not_null(test_data, ""); 57 58 test_data->base = base; 59 60 err = edata_cache_init(&test_data->shard_edata_cache, base); 61 assert_false(err, ""); 62 63 err = emap_init(&test_data->emap, test_data->base, /* zeroed */ false); 64 assert_false(err, ""); 65 66 err = hpa_central_init(&test_data->central, test_data->base, hooks); 67 assert_false(err, ""); 68 sec_opts_t sec_opts; 69 sec_opts.nshards = 0; 70 tsdn_t *tsdn = tsd_tsdn(tsd_fetch()); 71 err = hpa_shard_init(tsdn, &test_data->shard, &test_data->central, 72 &test_data->emap, test_data->base, &test_data->shard_edata_cache, 73 SHARD_IND, opts, &sec_opts); 74 assert_false(err, ""); 75 76 return (hpa_shard_t *)test_data; 77 } 78 79 static void 80 destroy_test_data(hpa_shard_t *shard) { 81 test_data_t *test_data = (test_data_t *)shard; 82 base_delete(TSDN_NULL, test_data->base); 83 free(test_data); 84 } 85 86 static uintptr_t defer_bump_ptr = HUGEPAGE * 123; 87 static void * 88 defer_test_map(size_t size) { 89 void *result = (void *)defer_bump_ptr; 90 defer_bump_ptr += size; 91 return result; 92 } 93 94 static void 95 defer_test_unmap(void *ptr, size_t size) { 96 (void)ptr; 97 (void)size; 98 } 99 100 static size_t ndefer_purge_calls = 0; 101 static size_t npurge_size = 0; 102 static void 103 defer_test_purge(void *ptr, size_t size) { 104 (void)ptr; 105 npurge_size = size; 106 ++ndefer_purge_calls; 107 } 108 109 static bool defer_vectorized_purge_called = false; 110 static bool 111 defer_vectorized_purge(void *vec, size_t vlen, size_t nbytes) { 112 (void)vec; 113 (void)nbytes; 114 ++ndefer_purge_calls; 115 defer_vectorized_purge_called = true; 116 return false; 117 } 118 119 static size_t ndefer_hugify_calls = 0; 120 static bool 121 defer_test_hugify(void *ptr, size_t size, bool sync) { 122 ++ndefer_hugify_calls; 123 return false; 124 } 125 126 static size_t ndefer_dehugify_calls = 0; 127 static void 128 defer_test_dehugify(void *ptr, size_t size) { 129 ++ndefer_dehugify_calls; 130 } 131 132 static nstime_t defer_curtime; 133 static void 134 defer_test_curtime(nstime_t *r_time, bool first_reading) { 135 *r_time = defer_curtime; 136 } 137 138 static uint64_t 139 defer_test_ms_since(nstime_t *past_time) { 140 return (nstime_ns(&defer_curtime) - nstime_ns(past_time)) / 1000 / 1000; 141 } 142 143 TEST_BEGIN(test_hpa_hugify_style_none_huge_no_syscall_thp_always) { 144 test_skip_if(!hpa_supported() || (opt_process_madvise_max_batch != 0)); 145 146 hpa_hooks_t hooks; 147 hooks.map = &defer_test_map; 148 hooks.unmap = &defer_test_unmap; 149 hooks.purge = &defer_test_purge; 150 hooks.hugify = &defer_test_hugify; 151 hooks.dehugify = &defer_test_dehugify; 152 hooks.curtime = &defer_test_curtime; 153 hooks.ms_since = &defer_test_ms_since; 154 hooks.vectorized_purge = &defer_vectorized_purge; 155 156 hpa_shard_opts_t opts = test_hpa_shard_opts_aggressive; 157 opts.deferral_allowed = true; 158 opts.purge_threshold = PAGE; 159 opts.min_purge_delay_ms = 0; 160 opts.hugification_threshold = HUGEPAGE * 0.25; 161 opts.dirty_mult = FXP_INIT_PERCENT(10); 162 opts.hugify_style = hpa_hugify_style_none; 163 opts.min_purge_interval_ms = 0; 164 opts.hugify_delay_ms = 0; 165 166 hpa_shard_t *shard = create_test_data(&hooks, &opts); 167 bool deferred_work_generated = false; 168 /* Current time = 10ms */ 169 nstime_init(&defer_curtime, 10 * 1000 * 1000); 170 171 /* Fake that system is in thp_always mode */ 172 system_thp_mode_t old_mode = init_system_thp_mode; 173 init_system_thp_mode = system_thp_mode_always; 174 175 tsdn_t *tsdn = tsd_tsdn(tsd_fetch()); 176 enum { NALLOCS = HUGEPAGE_PAGES }; 177 edata_t *edatas[NALLOCS]; 178 ndefer_purge_calls = 0; 179 for (int i = 0; i < NALLOCS / 2; i++) { 180 edatas[i] = pai_alloc(tsdn, &shard->pai, PAGE, PAGE, false, 181 false, false, &deferred_work_generated); 182 expect_ptr_not_null(edatas[i], "Unexpected null edata"); 183 } 184 hpdata_t *ps = psset_pick_alloc(&shard->psset, PAGE); 185 expect_true(hpdata_huge_get(ps), 186 "Page should be huge because thp=always and hugify_style is none"); 187 188 ndefer_hugify_calls = 0; 189 ndefer_purge_calls = 0; 190 hpa_shard_do_deferred_work(tsdn, shard); 191 expect_zu_eq(ndefer_hugify_calls, 0, "style=none, no syscall"); 192 expect_zu_eq(ndefer_dehugify_calls, 0, "style=none, no syscall"); 193 expect_zu_eq(ndefer_purge_calls, 1, "purge should happen"); 194 195 destroy_test_data(shard); 196 init_system_thp_mode = old_mode; 197 } 198 TEST_END 199 200 int 201 main(void) { 202 return test_no_reentrancy( 203 test_hpa_hugify_style_none_huge_no_syscall_thp_always); 204 } 205
Indexes created Sat Apr 25 00:22:52 UTC 2026