1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_EVENTS_STATS_
3 #define __PERF_EVENTS_STATS_
6 #include <perf/event.h>
7 #include <linux/types.h>
11 * The kernel collects the number of events it couldn't send in a stretch and
12 * when possible sends this number in a PERF_RECORD_LOST event. The number of
13 * such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while
14 * total_lost tells exactly how many events the kernel in fact lost, i.e. it is
15 * the sum of all struct perf_record_lost.lost fields reported.
17 * The kernel discards mixed up samples and sends the number in a
18 * PERF_RECORD_LOST_SAMPLES event. The number of lost-samples events is stored
19 * in .nr_events[PERF_RECORD_LOST_SAMPLES] while total_lost_samples tells
20 * exactly how many samples the kernel in fact dropped, i.e. it is the sum of
21 * all struct perf_record_lost_samples.lost fields reported.
23 * The total_period is needed because by default auto-freq is used, so
24 * multiplying nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
25 * the total number of low level events, it is necessary to to sum all struct
26 * perf_record_sample.period and stash the result in total_period.
30 u64 total_lost_samples;
32 u64 total_aux_partial;
33 u64 total_aux_collision;
34 u64 total_invalid_chains;
35 u32 nr_events[PERF_RECORD_HEADER_MAX];
37 u32 nr_unknown_events;
38 u32 nr_invalid_chains;
40 u32 nr_unprocessable_samples;
41 u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
42 u32 nr_proc_map_timeout;
47 u64 total_non_filtered_period;
49 u32 nr_non_filtered_samples;
52 void events_stats__inc(struct events_stats *stats, u32 type);
54 size_t events_stats__fprintf(struct events_stats *stats, FILE *fp,
57 #endif /* __PERF_EVENTS_STATS_ */