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2775de0b11
To make the output more readable, I think it's better to remove 0's in
the output. Also the dummy event has no event stats so it just wasts
the space. Let's use the --skip-empty option to suppress it.
$ perf report --stat --skip-empty
Aggregated stats:
TOTAL events: 16530
MMAP events: 226
COMM events: 1596
EXIT events: 2
THROTTLE events: 121
UNTHROTTLE events: 117
FORK events: 1595
SAMPLE events: 719
MMAP2 events: 12147
CGROUP events: 2
FINISHED_ROUND events: 2
THREAD_MAP events: 1
CPU_MAP events: 1
TIME_CONV events: 1
cycles stats:
SAMPLE events: 719
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210427013717.1651674-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_EVENTS_STATS_
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#define __PERF_EVENTS_STATS_
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#include <stdio.h>
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#include <perf/event.h>
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#include <linux/types.h>
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#include "auxtrace.h"
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/*
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* The kernel collects the number of events it couldn't send in a stretch and
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* when possible sends this number in a PERF_RECORD_LOST event. The number of
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* such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while
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* total_lost tells exactly how many events the kernel in fact lost, i.e. it is
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* the sum of all struct perf_record_lost.lost fields reported.
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*
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* The kernel discards mixed up samples and sends the number in a
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* PERF_RECORD_LOST_SAMPLES event. The number of lost-samples events is stored
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* in .nr_events[PERF_RECORD_LOST_SAMPLES] while total_lost_samples tells
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* exactly how many samples the kernel in fact dropped, i.e. it is the sum of
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* all struct perf_record_lost_samples.lost fields reported.
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*
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* The total_period is needed because by default auto-freq is used, so
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* multiplying nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
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* the total number of low level events, it is necessary to to sum all struct
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* perf_record_sample.period and stash the result in total_period.
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*/
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struct events_stats {
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u64 total_lost;
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u64 total_lost_samples;
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u64 total_aux_lost;
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u64 total_aux_partial;
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u64 total_invalid_chains;
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u32 nr_events[PERF_RECORD_HEADER_MAX];
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u32 nr_lost_warned;
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u32 nr_unknown_events;
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u32 nr_invalid_chains;
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u32 nr_unknown_id;
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u32 nr_unprocessable_samples;
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u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
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u32 nr_proc_map_timeout;
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};
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struct hists_stats {
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u64 total_period;
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u64 total_non_filtered_period;
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u32 nr_samples;
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u32 nr_non_filtered_samples;
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};
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void events_stats__inc(struct events_stats *stats, u32 type);
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size_t events_stats__fprintf(struct events_stats *stats, FILE *fp,
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bool skip_empty);
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#endif /* __PERF_EVENTS_STATS_ */
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