1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __PERF_EVENTS_STATS_
 3#define __PERF_EVENTS_STATS_
 4
 5#include <stdio.h>
 6#include <perf/event.h>
 7#include <linux/types.h>
 8#include "auxtrace.h"
 9
10/*
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.
16 *
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.
 
 
 
 
 
 
 
 
 
 
 
22 *
23 * The total_period is needed because by default auto-freq is used, so
24 * multipling 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.
27 */
28struct events_stats {
29	u64 total_period;
30	u64 total_non_filtered_period;
31	u64 total_lost;
32	u64 total_lost_samples;
 
33	u64 total_aux_lost;
34	u64 total_aux_partial;
 
35	u64 total_invalid_chains;
36	u32 nr_events[PERF_RECORD_HEADER_MAX];
37	u32 nr_non_filtered_samples;
38	u32 nr_lost_warned;
39	u32 nr_unknown_events;
40	u32 nr_invalid_chains;
41	u32 nr_unknown_id;
42	u32 nr_unprocessable_samples;
43	u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
44	u32 nr_proc_map_timeout;
 
 
 
 
 
 
 
 
 
45};
46
47void events_stats__inc(struct events_stats *stats, u32 type);
48
49size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
50
51#endif /* __PERF_EVENTS_STATS_ */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __PERF_EVENTS_STATS_
 3#define __PERF_EVENTS_STATS_
 4
 5#include <stdio.h>
 6#include <perf/event.h>
 7#include <linux/types.h>
 8#include "auxtrace.h"
 9
10/*
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.
16 *
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 without setting the
22 * misc field in the header.
23 *
24 * The BPF program can discard samples according to the filter expressions given
25 * by the user.  This number is kept in a BPF map and dumped at the end of perf
26 * record in a PERF_RECORD_LOST_SAMPLES event.  To differentiate it from other
27 * lost samples, perf tools sets PERF_RECORD_MISC_LOST_SAMPLES_BPF flag in the
28 * header.misc field.  The number of dropped-samples events is stored in
29 * .nr_events[PERF_RECORD_LOST_SAMPLES] while total_dropped_samples tells
30 * exactly how many samples the BPF program in fact dropped, i.e. it is the sum
31 * of all struct perf_record_lost_samples.lost fields reported with the misc
32 * field set in the header.
33 *
34 * The total_period is needed because by default auto-freq is used, so
35 * multiplying nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
36 * the total number of low level events, it is necessary to sum all struct
37 * perf_record_sample.period and stash the result in total_period.
38 */
39struct events_stats {
 
 
40	u64 total_lost;
41	u64 total_lost_samples;
42	u64 total_dropped_samples;
43	u64 total_aux_lost;
44	u64 total_aux_partial;
45	u64 total_aux_collision;
46	u64 total_invalid_chains;
47	u32 nr_events[PERF_RECORD_HEADER_MAX];
 
48	u32 nr_lost_warned;
49	u32 nr_unknown_events;
50	u32 nr_invalid_chains;
51	u32 nr_unknown_id;
52	u32 nr_unprocessable_samples;
53	u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
54	u32 nr_proc_map_timeout;
55};
56
57struct hists_stats {
58	u64 total_period;
59	u64 total_non_filtered_period;
60	u32 nr_samples;
61	u32 nr_non_filtered_samples;
62	u32 nr_lost_samples;
63	u32 nr_dropped_samples;
64};
65
66void events_stats__inc(struct events_stats *stats, u32 type);
67
68size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
69
70#endif /* __PERF_EVENTS_STATS_ */