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57 lines
1.9 KiB
57 lines
1.9 KiB
/* 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_aux_collision; |
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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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