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 rblist *metric_events, struct evlist *evlist, 49 const char *name) 50 { 51 struct metric_expr *mexp; 52 struct metric_event *me; 53 struct evsel *evsel; 54 55 evlist__for_each_entry(evlist, evsel) { 56 me = metricgroup__lookup(metric_events, evsel, false); 57 if (me != NULL) { 58 list_for_each_entry (mexp, &me->head, nd) { 59 if (strcmp(mexp->metric_name, name)) 60 continue; 61 return test_generic_metric(mexp, 0); 62 } 63 } 64 } 65 return 0.; 66 } 67 68 static int __compute_metric(const char *name, struct value *vals, 69 const char *name1, double *ratio1, 70 const char *name2, double *ratio2) 71 { 72 struct rblist metric_events = { 73 .nr_entries = 0, 74 }; 75 const struct pmu_metrics_table *pme_test; 76 struct perf_cpu_map *cpus; 77 struct evlist *evlist; 78 int err; 79 80 /* 81 * We need to prepare evlist for stat mode running on CPU 0 82 * because that's where all the stats are going to be created. 83 */ 84 evlist = evlist__new(); 85 if (!evlist) 86 return -ENOMEM; 87 88 cpus = perf_cpu_map__new("0"); 89 if (!cpus) { 90 evlist__delete(evlist); 91 return -ENOMEM; 92 } 93 94 perf_evlist__set_maps(&evlist->core, cpus, NULL); 95 96 /* Parse the metric into metric_events list. */ 97 pme_test = find_core_metrics_table("testarch", "testcpu"); 98 err = metricgroup__parse_groups_test(evlist, pme_test, name, 99 &metric_events); 100 if (err) 101 goto out; 102 103 err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false); 104 if (err) 105 goto out; 106 107 /* Load the runtime stats with given numbers for events. */ 108 load_runtime_stat(evlist, vals); 109 110 /* And execute the metric */ 111 if (name1 && ratio1) 112 *ratio1 = compute_single(&metric_events, evlist, name1); 113 if (name2 && ratio2) 114 *ratio2 = compute_single(&metric_events, evlist, name2); 115 116 out: 117 /* ... cleanup. */ 118 metricgroup__rblist_exit(&metric_events); 119 evlist__free_stats(evlist); 120 perf_cpu_map__put(cpus); 121 evlist__delete(evlist); 122 return err; 123 } 124 125 static int compute_metric(const char *name, struct value *vals, double *ratio) 126 { 127 return __compute_metric(name, vals, name, ratio, NULL, NULL); 128 } 129 130 static int compute_metric_group(const char *name, struct value *vals, 131 const char *name1, double *ratio1, 132 const char *name2, double *ratio2) 133 { 134 return __compute_metric(name, vals, name1, ratio1, name2, ratio2); 135 } 136 137 static int test_ipc(void) 138 { 139 double ratio; 140 struct value vals[] = { 141 { .event = "inst_retired.any", .val = 300 }, 142 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 143 { .event = NULL, }, 144 }; 145 146 TEST_ASSERT_VAL("failed to compute metric", 147 compute_metric("IPC", vals, &ratio) == 0); 148 149 TEST_ASSERT_VAL("IPC failed, wrong ratio", 150 ratio == 1.5); 151 return 0; 152 } 153 154 static int test_frontend(void) 155 { 156 double ratio; 157 struct value vals[] = { 158 { .event = "idq_uops_not_delivered.core", .val = 300 }, 159 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 160 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 }, 161 { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 }, 162 { .event = NULL, }, 163 }; 164 165 TEST_ASSERT_VAL("failed to compute metric", 166 compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0); 167 168 TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio", 169 ratio == 0.45); 170 return 0; 171 } 172 173 static int test_cache_miss_cycles(void) 174 { 175 double ratio; 176 struct value vals[] = { 177 { .event = "l1d-loads-misses", .val = 300 }, 178 { .event = "l1i-loads-misses", .val = 200 }, 179 { .event = "inst_retired.any", .val = 400 }, 180 { .event = NULL, }, 181 }; 182 183 TEST_ASSERT_VAL("failed to compute metric", 184 compute_metric("cache_miss_cycles", vals, &ratio) == 0); 185 186 TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio", 187 ratio == 1.25); 188 return 0; 189 } 190 191 192 /* 193 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi 194 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + 195 * l2_rqsts.pf_miss + l2_rqsts.rfo_miss 196 * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss 197 * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all) 198 * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all) 199 * 200 * l2_rqsts.demand_data_rd_hit = 100 201 * l2_rqsts.pf_hit = 200 202 * l2_rqsts.rfo_hi = 300 203 * l2_rqsts.all_demand_data_rd = 400 204 * l2_rqsts.pf_miss = 500 205 * l2_rqsts.rfo_miss = 600 206 * 207 * DCache_L2_All_Hits = 600 208 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400 209 * DCache_L2_All = 600 + 1400 = 2000 210 * DCache_L2_Hits = 600 / 2000 = 0.3 211 * DCache_L2_Misses = 1400 / 2000 = 0.7 212 */ 213 static int test_dcache_l2(void) 214 { 215 double ratio; 216 struct value vals[] = { 217 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 }, 218 { .event = "l2_rqsts.pf_hit", .val = 200 }, 219 { .event = "l2_rqsts.rfo_hit", .val = 300 }, 220 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 }, 221 { .event = "l2_rqsts.pf_miss", .val = 500 }, 222 { .event = "l2_rqsts.rfo_miss", .val = 600 }, 223 { .event = NULL, }, 224 }; 225 226 TEST_ASSERT_VAL("failed to compute metric", 227 compute_metric("DCache_L2_Hits", vals, &ratio) == 0); 228 229 TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio", 230 ratio == 0.3); 231 232 TEST_ASSERT_VAL("failed to compute metric", 233 compute_metric("DCache_L2_Misses", vals, &ratio) == 0); 234 235 TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio", 236 ratio == 0.7); 237 return 0; 238 } 239 240 static int test_recursion_fail(void) 241 { 242 double ratio; 243 struct value vals[] = { 244 { .event = "inst_retired.any", .val = 300 }, 245 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 246 { .event = NULL, }, 247 }; 248 249 TEST_ASSERT_VAL("failed to find recursion", 250 compute_metric("M1", vals, &ratio) == -1); 251 252 TEST_ASSERT_VAL("failed to find recursion", 253 compute_metric("M3", vals, &ratio) == -1); 254 return 0; 255 } 256 257 static int test_memory_bandwidth(void) 258 { 259 double ratio; 260 struct value vals[] = { 261 { .event = "l1d.replacement", .val = 4000000 }, 262 { .event = "duration_time", .val = 200000000 }, 263 { .event = NULL, }, 264 }; 265 266 TEST_ASSERT_VAL("failed to compute metric", 267 compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0); 268 TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio", 269 1.28 == ratio); 270 271 return 0; 272 } 273 274 static int test_metric_group(void) 275 { 276 double ratio1, ratio2; 277 struct value vals[] = { 278 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 279 { .event = "l1d-loads-misses", .val = 300 }, 280 { .event = "l1i-loads-misses", .val = 200 }, 281 { .event = "inst_retired.any", .val = 400 }, 282 { .event = NULL, }, 283 }; 284 285 TEST_ASSERT_VAL("failed to find recursion", 286 compute_metric_group("group1", vals, 287 "IPC", &ratio1, 288 "cache_miss_cycles", &ratio2) == 0); 289 290 TEST_ASSERT_VAL("group IPC failed, wrong ratio", 291 ratio1 == 2.0); 292 293 TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio", 294 ratio2 == 1.25); 295 return 0; 296 } 297 298 static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 299 { 300 TEST_ASSERT_VAL("IPC failed", test_ipc() == 0); 301 TEST_ASSERT_VAL("frontend failed", test_frontend() == 0); 302 TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0); 303 TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0); 304 TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0); 305 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0); 306 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0); 307 return 0; 308 } 309 310 DEFINE_SUITE("Parse and process metrics", parse_metric); 311