tools/perf/tests/parse-metric.c

   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 "pmu.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 runtime_stat *st, struct evlist *evlist,
  34                               struct value *vals)
  35 {
  36         struct evsel *evsel;
  37         u64 count;
  38
  39         perf_stat__reset_shadow_stats();
  40         evlist__for_each_entry(evlist, evsel) {
  41                 count = find_value(evsel->name, vals);
  42                 perf_stat__update_shadow_stats(evsel, count, 0, st);
  43                 if (!strcmp(evsel->name, "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                              struct runtime_stat *st, 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, st);
  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_events_table *pme_test;
  76         struct perf_cpu_map *cpus;
  77         struct runtime_stat st;
  78         struct evlist *evlist;
  79         int err;
  80
  81         /*
  82          * We need to prepare evlist for stat mode running on CPU 0
  83          * because that's where all the stats are going to be created.
  84          */
  85         evlist = evlist__new();
  86         if (!evlist)
  87                 return -ENOMEM;
  88
  89         cpus = perf_cpu_map__new("0");
  90         if (!cpus) {
  91                 evlist__delete(evlist);
  92                 return -ENOMEM;
  93         }
  94
  95         perf_evlist__set_maps(&evlist->core, cpus, NULL);
  96         runtime_stat__init(&st);
  97
  98         /* Parse the metric into metric_events list. */
  99         pme_test = find_core_events_table("testarch", "testcpu");
 100         err = metricgroup__parse_groups_test(evlist, pme_test, name,
 101                                              false, false,
 102                                              &metric_events);
 103         if (err)
 104                 goto out;
 105
 106         err = evlist__alloc_stats(/*config=*/NULL, evlist, /*alloc_raw=*/false);
 107         if (err)
 108                 goto out;
 109
 110         /* Load the runtime stats with given numbers for events. */
 111         load_runtime_stat(&st, evlist, vals);
 112
 113         /* And execute the metric */
 114         if (name1 && ratio1)
 115                 *ratio1 = compute_single(&metric_events, evlist, &st, name1);
 116         if (name2 && ratio2)
 117                 *ratio2 = compute_single(&metric_events, evlist, &st, name2);
 118
 119 out:
 120         /* ... cleanup. */
 121         metricgroup__rblist_exit(&metric_events);
 122         runtime_stat__exit(&st);
 123         evlist__free_stats(evlist);
 124         perf_cpu_map__put(cpus);
 125         evlist__delete(evlist);
 126         return err;
 127 }
 128
 129 static int compute_metric(const char *name, struct value *vals, double *ratio)
 130 {
 131         return __compute_metric(name, vals, name, ratio, NULL, NULL);
 132 }
 133
 134 static int compute_metric_group(const char *name, struct value *vals,
 135                                 const char *name1, double *ratio1,
 136                                 const char *name2, double *ratio2)
 137 {
 138         return __compute_metric(name, vals, name1, ratio1, name2, ratio2);
 139 }
 140
 141 static int test_ipc(void)
 142 {
 143         double ratio;
 144         struct value vals[] = {
 145                 { .event = "inst_retired.any",        .val = 300 },
 146                 { .event = "cpu_clk_unhalted.thread", .val = 200 },
 147                 { .event = NULL, },
 148         };
 149
 150         TEST_ASSERT_VAL("failed to compute metric",
 151                         compute_metric("IPC", vals, &ratio) == 0);
 152
 153         TEST_ASSERT_VAL("IPC failed, wrong ratio",
 154                         ratio == 1.5);
 155         return 0;
 156 }
 157
 158 static int test_frontend(void)
 159 {
 160         double ratio;
 161         struct value vals[] = {
 162                 { .event = "idq_uops_not_delivered.core",        .val = 300 },
 163                 { .event = "cpu_clk_unhalted.thread",            .val = 200 },
 164                 { .event = "cpu_clk_unhalted.one_thread_active", .val = 400 },
 165                 { .event = "cpu_clk_unhalted.ref_xclk",          .val = 600 },
 166                 { .event = NULL, },
 167         };
 168
 169         TEST_ASSERT_VAL("failed to compute metric",
 170                         compute_metric("Frontend_Bound_SMT", vals, &ratio) == 0);
 171
 172         TEST_ASSERT_VAL("Frontend_Bound_SMT failed, wrong ratio",
 173                         ratio == 0.45);
 174         return 0;
 175 }
 176
 177 static int test_cache_miss_cycles(void)
 178 {
 179         double ratio;
 180         struct value vals[] = {
 181                 { .event = "l1d-loads-misses",  .val = 300 },
 182                 { .event = "l1i-loads-misses",  .val = 200 },
 183                 { .event = "inst_retired.any",  .val = 400 },
 184                 { .event = NULL, },
 185         };
 186
 187         TEST_ASSERT_VAL("failed to compute metric",
 188                         compute_metric("cache_miss_cycles", vals, &ratio) == 0);
 189
 190         TEST_ASSERT_VAL("cache_miss_cycles failed, wrong ratio",
 191                         ratio == 1.25);
 192         return 0;
 193 }
 194
 195
 196 /*
 197  * DCache_L2_All_Hits = l2_rqsts.demand_data_rd_hit + l2_rqsts.pf_hit + l2_rqsts.rfo_hi
 198  * DCache_L2_All_Miss = max(l2_rqsts.all_demand_data_rd - l2_rqsts.demand_data_rd_hit, 0) +
 199  *                      l2_rqsts.pf_miss + l2_rqsts.rfo_miss
 200  * DCache_L2_All      = dcache_l2_all_hits + dcache_l2_all_miss
 201  * DCache_L2_Hits     = d_ratio(dcache_l2_all_hits, dcache_l2_all)
 202  * DCache_L2_Misses   = d_ratio(dcache_l2_all_miss, dcache_l2_all)
 203  *
 204  * l2_rqsts.demand_data_rd_hit = 100
 205  * l2_rqsts.pf_hit             = 200
 206  * l2_rqsts.rfo_hi             = 300
 207  * l2_rqsts.all_demand_data_rd = 400
 208  * l2_rqsts.pf_miss            = 500
 209  * l2_rqsts.rfo_miss           = 600
 210  *
 211  * DCache_L2_All_Hits = 600
 212  * DCache_L2_All_Miss = MAX(400 - 100, 0) + 500 + 600 = 1400
 213  * DCache_L2_All      = 600 + 1400  = 2000
 214  * DCache_L2_Hits     = 600 / 2000  = 0.3
 215  * DCache_L2_Misses   = 1400 / 2000 = 0.7
 216  */
 217 static int test_dcache_l2(void)
 218 {
 219         double ratio;
 220         struct value vals[] = {
 221                 { .event = "l2_rqsts.demand_data_rd_hit", .val = 100 },
 222                 { .event = "l2_rqsts.pf_hit",             .val = 200 },
 223                 { .event = "l2_rqsts.rfo_hit",            .val = 300 },
 224                 { .event = "l2_rqsts.all_demand_data_rd", .val = 400 },
 225                 { .event = "l2_rqsts.pf_miss",            .val = 500 },
 226                 { .event = "l2_rqsts.rfo_miss",           .val = 600 },
 227                 { .event = NULL, },
 228         };
 229
 230         TEST_ASSERT_VAL("failed to compute metric",
 231                         compute_metric("DCache_L2_Hits", vals, &ratio) == 0);
 232
 233         TEST_ASSERT_VAL("DCache_L2_Hits failed, wrong ratio",
 234                         ratio == 0.3);
 235
 236         TEST_ASSERT_VAL("failed to compute metric",
 237                         compute_metric("DCache_L2_Misses", vals, &ratio) == 0);
 238
 239         TEST_ASSERT_VAL("DCache_L2_Misses failed, wrong ratio",
 240                         ratio == 0.7);
 241         return 0;
 242 }
 243
 244 static int test_recursion_fail(void)
 245 {
 246         double ratio;
 247         struct value vals[] = {
 248                 { .event = "inst_retired.any",        .val = 300 },
 249                 { .event = "cpu_clk_unhalted.thread", .val = 200 },
 250                 { .event = NULL, },
 251         };
 252
 253         TEST_ASSERT_VAL("failed to find recursion",
 254                         compute_metric("M1", vals, &ratio) == -1);
 255
 256         TEST_ASSERT_VAL("failed to find recursion",
 257                         compute_metric("M3", vals, &ratio) == -1);
 258         return 0;
 259 }
 260
 261 static int test_memory_bandwidth(void)
 262 {
 263         double ratio;
 264         struct value vals[] = {
 265                 { .event = "l1d.replacement", .val = 4000000 },
 266                 { .event = "duration_time",  .val = 200000000 },
 267                 { .event = NULL, },
 268         };
 269
 270         TEST_ASSERT_VAL("failed to compute metric",
 271                         compute_metric("L1D_Cache_Fill_BW", vals, &ratio) == 0);
 272         TEST_ASSERT_VAL("L1D_Cache_Fill_BW, wrong ratio",
 273                         1.28 == ratio);
 274
 275         return 0;
 276 }
 277
 278 static int test_metric_group(void)
 279 {
 280         double ratio1, ratio2;
 281         struct value vals[] = {
 282                 { .event = "cpu_clk_unhalted.thread", .val = 200 },
 283                 { .event = "l1d-loads-misses",        .val = 300 },
 284                 { .event = "l1i-loads-misses",        .val = 200 },
 285                 { .event = "inst_retired.any",        .val = 400 },
 286                 { .event = NULL, },
 287         };
 288
 289         TEST_ASSERT_VAL("failed to find recursion",
 290                         compute_metric_group("group1", vals,
 291                                              "IPC", &ratio1,
 292                                              "cache_miss_cycles", &ratio2) == 0);
 293
 294         TEST_ASSERT_VAL("group IPC failed, wrong ratio",
 295                         ratio1 == 2.0);
 296
 297         TEST_ASSERT_VAL("group cache_miss_cycles failed, wrong ratio",
 298                         ratio2 == 1.25);
 299         return 0;
 300 }
 301
 302 static int test__parse_metric(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 303 {
 304         TEST_ASSERT_VAL("IPC failed", test_ipc() == 0);
 305         TEST_ASSERT_VAL("frontend failed", test_frontend() == 0);
 306         TEST_ASSERT_VAL("DCache_L2 failed", test_dcache_l2() == 0);
 307         TEST_ASSERT_VAL("recursion fail failed", test_recursion_fail() == 0);
 308         TEST_ASSERT_VAL("Memory bandwidth", test_memory_bandwidth() == 0);
 309
 310         if (!perf_pmu__has_hybrid()) {
 311                 TEST_ASSERT_VAL("cache_miss_cycles failed", test_cache_miss_cycles() == 0);
 312                 TEST_ASSERT_VAL("test metric group", test_metric_group() == 0);
 313         }
 314         return 0;
 315 }
 316
 317 DEFINE_SUITE("Parse and process metrics", parse_metric);