For hybrid events, by default stat aggregates and reports the event counts
per pmu.
# ./perf stat -e cycles -a sleep 1
Performance counter stats for 'system wide':
14,066,877,268 cpu_core/cycles/
6,814,443,147 cpu_atom/cycles/
1.
002760625 seconds time elapsed
Sometimes, it's also useful to aggregate event counts from all PMUs.
Create a new option '--hybrid-merge' to enable that behavior and report
the counts without PMUs.
# ./perf stat -e cycles -a --hybrid-merge sleep 1
Performance counter stats for 'system wide':
20,732,982,512 cycles
1.
002776793 seconds time elapsed
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220422065635.767648-2-zhengjun.xing@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2. Aliases, which are listed immediately after the Kernel PMU events
by perf list, are used.
+--hybrid-merge::
+Merge the hybrid event counts from all PMUs.
+
+For hybrid events, by default, the stat aggregates and reports the event
+counts per PMU. But sometimes, it's also useful to aggregate event counts
+from all PMUs. This option enables that behavior and reports the counts
+without PMUs.
+
+For non-hybrid events, it should be no effect.
+
--smi-cost::
Measure SMI cost if msr/aperf/ and msr/smi/ events are supported.
OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
"disable CPU count aggregation", AGGR_NONE),
OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
+ OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
+ "Merge identical named hybrid events"),
OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
"print counts with custom separator"),
OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
return perf_pmu__has_hybrid() && !is_uncore(evsel);
}
+static bool hybrid_merge(struct evsel *counter, struct perf_stat_config *config,
+ bool check)
+{
+ if (hybrid_uniquify(counter)) {
+ if (check)
+ return config && config->hybrid_merge;
+ else
+ return config && !config->hybrid_merge;
+ }
+
+ return false;
+}
+
static bool collect_data(struct perf_stat_config *config, struct evsel *counter,
void (*cb)(struct perf_stat_config *config, struct evsel *counter, void *data,
bool first),
if (counter->merged_stat)
return false;
cb(config, counter, data, true);
- if (config->no_merge || hybrid_uniquify(counter))
+ if (config->no_merge || hybrid_merge(counter, config, false))
uniquify_event_name(counter, config);
- else if (counter->auto_merge_stats)
+ else if (counter->auto_merge_stats || hybrid_merge(counter, config, true))
collect_all_aliases(config, counter, cb, data);
return true;
}
bool ru_display;
bool big_num;
bool no_merge;
+ bool hybrid_merge;
bool walltime_run_table;
bool all_kernel;
bool all_user;