tools/perf/util/evlist-hybrid.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <errno.h>
   3 #include <inttypes.h>
   4 #include "cpumap.h"
   5 #include "evlist.h"
   6 #include "evsel.h"
   7 #include "../perf.h"
   8 #include "util/pmu-hybrid.h"
   9 #include "util/evlist-hybrid.h"
  10 #include "debug.h"
  11 #include <unistd.h>
  12 #include <stdlib.h>
  13 #include <linux/err.h>
  14 #include <linux/string.h>
  15 #include <perf/evlist.h>
  16 #include <perf/evsel.h>
  17 #include <perf/cpumap.h>
  18
  19 int evlist__add_default_hybrid(struct evlist *evlist, bool precise)
  20 {
  21         struct evsel *evsel;
  22         struct perf_pmu *pmu;
  23         __u64 config;
  24         struct perf_cpu_map *cpus;
  25
  26         perf_pmu__for_each_hybrid_pmu(pmu) {
  27                 config = PERF_COUNT_HW_CPU_CYCLES |
  28                          ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
  29                 evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
  30                                           config);
  31                 if (!evsel)
  32                         return -ENOMEM;
  33
  34                 cpus = perf_cpu_map__get(pmu->cpus);
  35                 evsel->core.cpus = cpus;
  36                 evsel->core.own_cpus = perf_cpu_map__get(cpus);
  37                 evsel->pmu_name = strdup(pmu->name);
  38                 evlist__add(evlist, evsel);
  39         }
  40
  41         return 0;
  42 }
  43
  44 static bool group_hybrid_conflict(struct evsel *leader)
  45 {
  46         struct evsel *pos, *prev = NULL;
  47
  48         for_each_group_evsel(pos, leader) {
  49                 if (!evsel__is_hybrid(pos))
  50                         continue;
  51
  52                 if (prev && strcmp(prev->pmu_name, pos->pmu_name))
  53                         return true;
  54
  55                 prev = pos;
  56         }
  57
  58         return false;
  59 }
  60
  61 void evlist__warn_hybrid_group(struct evlist *evlist)
  62 {
  63         struct evsel *evsel;
  64
  65         evlist__for_each_entry(evlist, evsel) {
  66                 if (evsel__is_group_leader(evsel) &&
  67                     evsel->core.nr_members > 1 &&
  68                     group_hybrid_conflict(evsel)) {
  69                         pr_warning("WARNING: events in group from "
  70                                    "different hybrid PMUs!\n");
  71                         return;
  72                 }
  73         }
  74 }
  75
  76 bool evlist__has_hybrid(struct evlist *evlist)
  77 {
  78         struct evsel *evsel;
  79
  80         evlist__for_each_entry(evlist, evsel) {
  81                 if (evsel->pmu_name &&
  82                     perf_pmu__is_hybrid(evsel->pmu_name)) {
  83                         return true;
  84                 }
  85         }
  86
  87         return false;
  88 }