1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <string.h> 4 #include <perf/cpumap.h> 5 #include <perf/evlist.h> 6 #include "metricgroup.h" 7 #include "tests.h" 8 #include "pmu-events/pmu-events.h" 9 #include "evlist.h" 10 #include "rblist.h" 11 #include "debug.h" 12 #include "expr.h" 13 #include "stat.h" 14 #include "pmus.h" 15 16 struct value { 17 const char *event; 18 u64 val; 19 }; 20 21 static u64 find_value(const char *name, struct value *values) 22 { 23 struct value *v = values; 24 25 while (v->event) { 26 if (!strcmp(name, v->event)) 27 return v->val; 28 v++; 29 } 30 return 0; 31 } 32 33 static void load_runtime_stat(struct evlist *evlist, struct value *vals) 34 { 35 struct evsel *evsel; 36 u64 count; 37 38 evlist__alloc_aggr_stats(evlist, 1); 39 evlist__for_each_entry(evlist, evsel) { 40 count = find_value(evsel->name, vals); 41 evsel->supported = true; 42 evsel->stats->aggr->counts.val = count; 43 if (evsel__name_is(evsel, "duration_time")) 44 update_stats(&walltime_nsecs_stats, count); 45 } 46 } 47 48 static double compute_single(struct evlist *evlist, const char *name) 49 { 50 struct metric_expr *mexp; 51 struct metric_event *me; 52 struct evsel *evsel; 53 54 evlist__for_each_entry(evlist, evsel) { 55 me = metricgroup__lookup(&evlist->metric_events, evsel, false); 56 if (me != NULL) { 57 list_for_each_entry (mexp, &me->head, nd) { 58 if (strcmp(mexp->metric_name, name)) 59 continue; 60 return test_generic_metric(mexp, 0); 61 } 62 } 63 } 64 return 0.; 65 } 66 67 static int __compute_metric(const char *name, struct value *vals, 68 const char *name1, double *ratio1, 69 const char *name2, double *ratio2) 70 { 71 const struct pmu_metrics_table *pme_test; 72 struct perf_cpu_map *cpus; 73 struct evlist *evlist; 74 int err; 75 76 /* 77 * We need to prepare evlist for stat mode running on CPU 0 78 * because that's where all the stats are going to be created. 79 */ 80 evlist = evlist__new(); 81 if (!evlist) 82 return -ENOMEM; 83 84 cpus = perf_cpu_map__new("0"); 85 if (!cpus) { 86 evlist__delete(evlist); 87 return -ENOMEM; 88 } 89 90 perf_evlist__set_maps(&evlist->core, cpus, NULL); 91 92 /* Parse the metric into metric_events list. */ 93 pme_test = find_core_metrics_table("testarch", "testcpu"); 94 err = metricgroup__parse_groups_test(evlist, pme_test, name); 95 if (err) 96 goto out; 97 98 err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false); 99 if (err) 100 goto out; 101 102 /* Load the runtime stats with given numbers for events. */ 103 load_runtime_stat(evlist, vals); 104 105 /* And execute the metric */ 106 if (name1 && ratio1) 107 *ratio1 = compute_single(evlist, name1); 108 if (name2 && ratio2) 109 *ratio2 = compute_single(evlist, name2); 110 111 out: 112 /* ... cleanup. */ 113 evlist__free_stats(evlist); 114 perf_cpu_map__put(cpus); 115 evlist__delete(evlist); 116 return err; 117 } 118 119 static int compute_metric(const char *name, struct value *vals, double *ratio) 120 { 121 return __compute_metric(name, vals, name, ratio, NULL, NULL); 122 } 123 124 static int compute_metric_group(const char *name, struct value *vals, 125 const char *name1, double *ratio1, 126 const char *name2, double *ratio2) 127 { 128 return __compute_metric(name, vals, name1, ratio1, name2, ratio2); 129 } 130 131 static int test_ipc(void) 132 { 133 double ratio; 134 struct value vals[] = { 135 { .event = "inst_retired.any", .val = 300 }, 136 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 137 { .event = NULL, }, 138 }; 139 140 TEST_ASSERT_VAL("failed to compute metric", 141 compute_metric("IPC", vals, &ratio) == 0); 142 143 TEST_ASSERT_VAL("IPC failed, wrong ratio", 144 ratio == 1.5); 145 return 0; 146 } 147 148 static int test_frontend(void) 149 { 150 double ratio; 151 struct value vals[] = { 152 { .event = "idq_uops_not_delivered.core", .val = 300 }, 153 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 154 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 }, 155 { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 }, 156 { .event = NULL, }, 157 }; 158 159 TEST_ASSERT_VAL("failed to compute metric", 160 compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0); 161 162 TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio", 163 ratio == 0.45); 164 return 0; 165 } 166 167 static int test_cache_miss_cycles(void) 168 { 169 double ratio; 170 struct value vals[] = { 171 { .event = "l1d-loads-misses", .val = 300 }, 172 { .event = "l1i-loads-misses", .val = 200 }, 173 { .event = "inst_retired.any", .val = 400 }, 174 { .event = NULL, }, 175 }; 176 177 TEST_ASSERT_VAL("failed to compute metric", 178 compute_metric("cache_miss_cycles", vals, &ratio) == 0); 179 180 TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio", 181 ratio == 1.25); 182 return 0; 183 } 184 185 186 /* 187 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi 188 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + 189 * l2_rqsts.pf_miss + l2_rqsts.rfo_miss 190 * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss 191 * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all) 192 * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all) 193 * 194 * l2_rqsts.demand_data_rd_hit = 100 195 * l2_rqsts.pf_hit = 200 196 * l2_rqsts.rfo_hi = 300 197 * l2_rqsts.all_demand_data_rd = 400 198 * l2_rqsts.pf_miss = 500 199 * l2_rqsts.rfo_miss = 600 200 * 201 * DCache_L2_All_Hits = 600 202 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400 203 * DCache_L2_All = 600 + 1400 = 2000 204 * DCache_L2_Hits = 600 / 2000 = 0.3 205 * DCache_L2_Misses = 1400 / 2000 = 0.7 206 */ 207 static int test_dcache_l2(void) 208 { 209 double ratio; 210 struct value vals[] = { 211 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 }, 212 { .event = "l2_rqsts.pf_hit", .val = 200 }, 213 { .event = "l2_rqsts.rfo_hit", .val = 300 }, 214 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 }, 215 { .event = "l2_rqsts.pf_miss", .val = 500 }, 216 { .event = "l2_rqsts.rfo_miss", .val = 600 }, 217 { .event = NULL, }, 218 }; 219 220 TEST_ASSERT_VAL("failed to compute metric", 221 compute_metric("DCache_L2_Hits", vals, &ratio) == 0); 222 223 TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio", 224 ratio == 0.3); 225 226 TEST_ASSERT_VAL("failed to compute metric", 227 compute_metric("DCache_L2_Misses", vals, &ratio) == 0); 228 229 TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio", 230 ratio == 0.7); 231 return 0; 232 } 233 234 static int test_recursion_fail(void) 235 { 236 double ratio; 237 struct value vals[] = { 238 { .event = "inst_retired.any", .val = 300 }, 239 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 240 { .event = NULL, }, 241 }; 242 243 TEST_ASSERT_VAL("failed to find recursion", 244 compute_metric("M1", vals, &ratio) == -1); 245 246 TEST_ASSERT_VAL("failed to find recursion", 247 compute_metric("M3", vals, &ratio) == -1); 248 return 0; 249 } 250 251 static int test_memory_bandwidth(void) 252 { 253 double ratio; 254 struct value vals[] = { 255 { .event = "l1d.replacement", .val = 4000000 }, 256 { .event = "duration_time", .val = 200000000 }, 257 { .event = NULL, }, 258 }; 259 260 TEST_ASSERT_VAL("failed to compute metric", 261 compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0); 262 TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio", 263 1.28 == ratio); 264 265 return 0; 266 } 267 268 static int test_metric_group(void) 269 { 270 double ratio1, ratio2; 271 struct value vals[] = { 272 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 273 { .event = "l1d-loads-misses", .val = 300 }, 274 { .event = "l1i-loads-misses", .val = 200 }, 275 { .event = "inst_retired.any", .val = 400 }, 276 { .event = NULL, }, 277 }; 278 279 TEST_ASSERT_VAL("failed to find recursion", 280 compute_metric_group("group1", vals, 281 "IPC", &ratio1, 282 "cache_miss_cycles", &ratio2) == 0); 283 284 TEST_ASSERT_VAL("group IPC failed, wrong ratio", 285 ratio1 == 2.0); 286 287 TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio", 288 ratio2 == 1.25); 289 return 0; 290 } 291 292 static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 293 { 294 TEST_ASSERT_VAL("IPC failed", test_ipc() == 0); 295 TEST_ASSERT_VAL("frontend failed", test_frontend() == 0); 296 TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0); 297 TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0); 298 TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0); 299 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0); 300 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0); 301 return 0; 302 } 303 304 DEFINE_SUITE("Parse and process metrics", parse_metric); 305