From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- tools/perf/util/events_stats.h | 58 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 tools/perf/util/events_stats.h (limited to 'tools/perf/util/events_stats.h') diff --git a/tools/perf/util/events_stats.h b/tools/perf/util/events_stats.h new file mode 100644 index 000000000..8fecc9fba --- /dev/null +++ b/tools/perf/util/events_stats.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_EVENTS_STATS_ +#define __PERF_EVENTS_STATS_ + +#include +#include +#include +#include "auxtrace.h" + +/* + * The kernel collects the number of events it couldn't send in a stretch and + * when possible sends this number in a PERF_RECORD_LOST event. The number of + * such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while + * total_lost tells exactly how many events the kernel in fact lost, i.e. it is + * the sum of all struct perf_record_lost.lost fields reported. + * + * The kernel discards mixed up samples and sends the number in a + * PERF_RECORD_LOST_SAMPLES event. The number of lost-samples events is stored + * in .nr_events[PERF_RECORD_LOST_SAMPLES] while total_lost_samples tells + * exactly how many samples the kernel in fact dropped, i.e. it is the sum of + * all struct perf_record_lost_samples.lost fields reported. + * + * The total_period is needed because by default auto-freq is used, so + * multiplying nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get + * the total number of low level events, it is necessary to sum all struct + * perf_record_sample.period and stash the result in total_period. + */ +struct events_stats { + u64 total_lost; + u64 total_lost_samples; + u64 total_aux_lost; + u64 total_aux_partial; + u64 total_aux_collision; + u64 total_invalid_chains; + u32 nr_events[PERF_RECORD_HEADER_MAX]; + u32 nr_lost_warned; + u32 nr_unknown_events; + u32 nr_invalid_chains; + u32 nr_unknown_id; + u32 nr_unprocessable_samples; + u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX]; + u32 nr_proc_map_timeout; +}; + +struct hists_stats { + u64 total_period; + u64 total_non_filtered_period; + u32 nr_samples; + u32 nr_non_filtered_samples; + u32 nr_lost_samples; +}; + +void events_stats__inc(struct events_stats *stats, u32 type); + +size_t events_stats__fprintf(struct events_stats *stats, FILE *fp, + bool skip_empty); + +#endif /* __PERF_EVENTS_STATS_ */ -- cgit v1.2.3