1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <errno.h> 4 #include <string.h> 5 #include <perf/cpumap.h> 6 #include <perf/evlist.h> 7 #include "metricgroup.h" 8 #include "tests.h" 9 #include "pmu-events/pmu-events.h" 10 #include "evlist.h" 11 #include "rblist.h" 12 #include "debug.h" 13 #include "expr.h" 14 #include "stat.h" 15 #include "pmus.h" 16 17 struct value { 18 const char *event; 19 u64 val; 20 }; 21 22 static u64 find_value(const char *name, struct value *values) 23 { 24 struct value *v = values; 25 26 while (v->event) { 27 if (!strcmp(name, v->event)) 28 return v->val; 29 v++; 30 } 31 return 0; 32 } 33 34 static void load_runtime_stat(struct evlist *evlist, struct value *vals) 35 { 36 struct evsel *evsel; 37 u64 count; 38 39 evlist__alloc_aggr_stats(evlist, 1); 40 evlist__for_each_entry(evlist, evsel) { 41 count = find_value(evsel->name, vals); 42 evsel->supported = true; 43 evsel->stats->aggr->counts.val = count; 44 if (evsel__name_is(evsel, "duration_time")) 45 update_stats(&walltime_nsecs_stats, count); 46 } 47 } 48 49 static double compute_single(struct evlist *evlist, 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(&evlist->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 const struct pmu_metrics_table *pme_test; 73 struct perf_cpu_map *cpus; 74 struct evlist *evlist; 75 int err; 76 77 /* 78 * We need to prepare evlist for stat mode running on CPU 0 79 * because that's where all the stats are going to be created. 80 */ 81 evlist = evlist__new(); 82 if (!evlist) 83 return -ENOMEM; 84 85 cpus = perf_cpu_map__new("0"); 86 if (!cpus) { 87 evlist__delete(evlist); 88 return -ENOMEM; 89 } 90 91 perf_evlist__set_maps(&evlist->core, cpus, NULL); 92 93 /* Parse the metric into metric_events list. */ 94 pme_test = find_core_metrics_table("testarch", "testcpu"); 95 err = metricgroup__parse_groups_test(evlist, pme_test, name); 96 if (err) 97 goto out; 98 99 err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false); 100 if (err) 101 goto out; 102 103 /* Load the runtime stats with given numbers for events. */ 104 load_runtime_stat(evlist, vals); 105 106 /* And execute the metric */ 107 if (name1 && ratio1) 108 *ratio1 = compute_single(evlist, name1); 109 if (name2 && ratio2) 110 *ratio2 = compute_single(evlist, name2); 111 112 out: 113 /* ... cleanup. */ 114 evlist__free_stats(evlist); 115 perf_cpu_map__put(cpus); 116 evlist__delete(evlist); 117 return err; 118 } 119 120 static int compute_metric(const char *name, struct value *vals, double *ratio) 121 { 122 return __compute_metric(name, vals, name, ratio, NULL, NULL); 123 } 124 125 static int compute_metric_group(const char *name, struct value *vals, 126 const char *name1, double *ratio1, 127 const char *name2, double *ratio2) 128 { 129 return __compute_metric(name, vals, name1, ratio1, name2, ratio2); 130 } 131 132 static int test_ipc(void) 133 { 134 double ratio; 135 struct value vals[] = { 136 { .event = "inst_retired.any", .val = 300 }, 137 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 138 { .event = NULL, }, 139 }; 140 141 TEST_ASSERT_VAL("failed to compute metric", 142 compute_metric("IPC", vals, &ratio) == 0); 143 144 TEST_ASSERT_VAL("IPC failed, wrong ratio", 145 ratio == 1.5); 146 return 0; 147 } 148 149 static int test_frontend(void) 150 { 151 double ratio; 152 struct value vals[] = { 153 { .event = "idq_uops_not_delivered.core", .val = 300 }, 154 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 155 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 }, 156 { .event = "cpu_clk_unhalted.ref_xclk", .val = 600 }, 157 { .event = NULL, }, 158 }; 159 160 TEST_ASSERT_VAL("failed to compute metric", 161 compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0); 162 163 TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio", 164 ratio == 0.45); 165 return 0; 166 } 167 168 static int test_cache_miss_cycles(void) 169 { 170 double ratio; 171 struct value vals[] = { 172 { .event = "l1d-loads-misses", .val = 300 }, 173 { .event = "l1i-loads-misses", .val = 200 }, 174 { .event = "inst_retired.any", .val = 400 }, 175 { .event = NULL, }, 176 }; 177 178 TEST_ASSERT_VAL("failed to compute metric", 179 compute_metric("cache_miss_cycles", vals, &ratio) == 0); 180 181 TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio", 182 ratio == 1.25); 183 return 0; 184 } 185 186 187 /* 188 * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi 189 * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) + 190 * l2_rqsts.pf_miss + l2_rqsts.rfo_miss 191 * DCache_L2_All = dcache_l2_all_hits + dcache_l2_all_miss 192 * DCache_L2_Hits = d_ratio(dcache_l2_all_hits, dcache_l2_all) 193 * DCache_L2_Misses = d_ratio(dcache_l2_all_miss, dcache_l2_all) 194 * 195 * l2_rqsts.demand_data_rd_hit = 100 196 * l2_rqsts.pf_hit = 200 197 * l2_rqsts.rfo_hi = 300 198 * l2_rqsts.all_demand_data_rd = 400 199 * l2_rqsts.pf_miss = 500 200 * l2_rqsts.rfo_miss = 600 201 * 202 * DCache_L2_All_Hits = 600 203 * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400 204 * DCache_L2_All = 600 + 1400 = 2000 205 * DCache_L2_Hits = 600 / 2000 = 0.3 206 * DCache_L2_Misses = 1400 / 2000 = 0.7 207 */ 208 static int test_dcache_l2(void) 209 { 210 double ratio; 211 struct value vals[] = { 212 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 }, 213 { .event = "l2_rqsts.pf_hit", .val = 200 }, 214 { .event = "l2_rqsts.rfo_hit", .val = 300 }, 215 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 }, 216 { .event = "l2_rqsts.pf_miss", .val = 500 }, 217 { .event = "l2_rqsts.rfo_miss", .val = 600 }, 218 { .event = NULL, }, 219 }; 220 221 TEST_ASSERT_VAL("failed to compute metric", 222 compute_metric("DCache_L2_Hits", vals, &ratio) == 0); 223 224 TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio", 225 ratio == 0.3); 226 227 TEST_ASSERT_VAL("failed to compute metric", 228 compute_metric("DCache_L2_Misses", vals, &ratio) == 0); 229 230 TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio", 231 ratio == 0.7); 232 return 0; 233 } 234 235 static int test_recursion_fail(void) 236 { 237 double ratio; 238 struct value vals[] = { 239 { .event = "inst_retired.any", .val = 300 }, 240 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 241 { .event = NULL, }, 242 }; 243 244 TEST_ASSERT_VAL("failed to find recursion", 245 compute_metric("M1", vals, &ratio) == -1); 246 247 TEST_ASSERT_VAL("failed to find recursion", 248 compute_metric("M3", vals, &ratio) == -1); 249 return 0; 250 } 251 252 static int test_memory_bandwidth(void) 253 { 254 double ratio; 255 struct value vals[] = { 256 { .event = "l1d.replacement", .val = 4000000 }, 257 { .event = "duration_time", .val = 200000000 }, 258 { .event = NULL, }, 259 }; 260 261 TEST_ASSERT_VAL("failed to compute metric", 262 compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0); 263 TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio", 264 1.28 == ratio); 265 266 return 0; 267 } 268 269 static int test_metric_group(void) 270 { 271 double ratio1, ratio2; 272 struct value vals[] = { 273 { .event = "cpu_clk_unhalted.thread", .val = 200 }, 274 { .event = "l1d-loads-misses", .val = 300 }, 275 { .event = "l1i-loads-misses", .val = 200 }, 276 { .event = "inst_retired.any", .val = 400 }, 277 { .event = NULL, }, 278 }; 279 280 TEST_ASSERT_VAL("failed to find recursion", 281 compute_metric_group("group1", vals, 282 "IPC", &ratio1, 283 "cache_miss_cycles", &ratio2) == 0); 284 285 TEST_ASSERT_VAL("group IPC failed, wrong ratio", 286 ratio1 == 2.0); 287 288 TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio", 289 ratio2 == 1.25); 290 return 0; 291 } 292 293 static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 294 { 295 TEST_ASSERT_VAL("IPC failed", test_ipc() == 0); 296 TEST_ASSERT_VAL("frontend failed", test_frontend() == 0); 297 TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0); 298 TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0); 299 TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0); 300 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0); 301 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0); 302 return 0; 303 } 304 305 DEFINE_SUITE("Parse and process metrics", parse_metric); 306