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 | * 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 sum all struct |
26 | * perf_record_sample.period and stash the result in total_period. |
27 | */ |
28 | struct events_stats { |
29 | u64 total_lost; |
30 | u64 total_lost_samples; |
31 | u64 total_aux_lost; |
32 | u64 total_aux_partial; |
33 | u64 total_aux_collision; |
34 | u64 total_invalid_chains; |
35 | u32 nr_events[PERF_RECORD_HEADER_MAX]; |
36 | u32 nr_lost_warned; |
37 | u32 nr_unknown_events; |
38 | u32 nr_invalid_chains; |
39 | u32 nr_unknown_id; |
40 | u32 nr_unprocessable_samples; |
41 | u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX]; |
42 | u32 nr_proc_map_timeout; |
43 | }; |
44 | |
45 | struct hists_stats { |
46 | u64 total_period; |
47 | u64 total_non_filtered_period; |
48 | u32 nr_samples; |
49 | u32 nr_non_filtered_samples; |
50 | u32 nr_lost_samples; |
51 | }; |
52 | |
53 | void events_stats__inc(struct events_stats *stats, u32 type); |
54 | |
55 | size_t events_stats__fprintf(struct events_stats *stats, FILE *fp, |
56 | bool skip_empty); |
57 | |
58 | #endif /* __PERF_EVENTS_STATS_ */ |
59 | |