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 "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);