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 }
  89
  90 int evlist__fix_hybrid_cpus(struct evlist *evlist, const char *cpu_list)
  91 {
  92         struct perf_cpu_map *cpus;
  93         struct evsel *evsel, *tmp;
  94         struct perf_pmu *pmu;
  95         int ret, unmatched_count = 0, events_nr = 0;
  96
  97         if (!perf_pmu__has_hybrid() || !cpu_list)
  98                 return 0;
  99
 100         cpus = perf_cpu_map__new(cpu_list);
 101         if (!cpus)
 102                 return -1;
 103
 104         /*
 105          * The evsels are created with hybrid pmu's cpus. But now we
 106          * need to check and adjust the cpus of evsel by cpu_list because
 107          * cpu_list may cause conflicts with cpus of evsel. For example,
 108          * cpus of evsel is cpu0-7, but the cpu_list is cpu6-8, we need
 109          * to adjust the cpus of evsel to cpu6-7. And then propatate maps
 110          * in evlist__create_maps().
 111          */
 112         evlist__for_each_entry_safe(evlist, tmp, evsel) {
 113                 struct perf_cpu_map *matched_cpus, *unmatched_cpus;
 114                 char buf1[128], buf2[128];
 115
 116                 pmu = perf_pmu__find_hybrid_pmu(evsel->pmu_name);
 117                 if (!pmu)
 118                         continue;
 119
 120                 ret = perf_pmu__cpus_match(pmu, cpus, &matched_cpus,
 121                                            &unmatched_cpus);
 122                 if (ret)
 123                         goto out;
 124
 125                 events_nr++;
 126
 127                 if (perf_cpu_map__nr(matched_cpus) > 0 &&
 128                     (perf_cpu_map__nr(unmatched_cpus) > 0 ||
 129                      perf_cpu_map__nr(matched_cpus) < perf_cpu_map__nr(cpus) ||
 130                      perf_cpu_map__nr(matched_cpus) < perf_cpu_map__nr(pmu->cpus))) {
 131                         perf_cpu_map__put(evsel->core.cpus);
 132                         perf_cpu_map__put(evsel->core.own_cpus);
 133                         evsel->core.cpus = perf_cpu_map__get(matched_cpus);
 134                         evsel->core.own_cpus = perf_cpu_map__get(matched_cpus);
 135
 136                         if (perf_cpu_map__nr(unmatched_cpus) > 0) {
 137                                 cpu_map__snprint(matched_cpus, buf1, sizeof(buf1));
 138                                 pr_warning("WARNING: use %s in '%s' for '%s', skip other cpus in list.\n",
 139                                            buf1, pmu->name, evsel->name);
 140                         }
 141                 }
 142
 143                 if (perf_cpu_map__nr(matched_cpus) == 0) {
 144                         evlist__remove(evlist, evsel);
 145                         evsel__delete(evsel);
 146
 147                         cpu_map__snprint(cpus, buf1, sizeof(buf1));
 148                         cpu_map__snprint(pmu->cpus, buf2, sizeof(buf2));
 149                         pr_warning("WARNING: %s isn't a '%s', please use a CPU list in the '%s' range (%s)\n",
 150                                    buf1, pmu->name, pmu->name, buf2);
 151                         unmatched_count++;
 152                 }
 153
 154                 perf_cpu_map__put(matched_cpus);
 155                 perf_cpu_map__put(unmatched_cpus);
 156         }
 157         if (events_nr)
 158                 ret = (unmatched_count == events_nr) ? -1 : 0;
 159 out:
 160         perf_cpu_map__put(cpus);
 161         return ret;
 162 }