Adding lost count to perf top headers: # perf top --stdio PerfTop: 3850 irqs/sec kernel:49.0% exact: 100.0% lost: 0/0 [4000Hz cycles:ppp], (all, 8 CPUs)
# perf top Samples: 0 of event 'cycles:ppp', 4000 Hz, Event count (approx.): 0 lost: 0/0 The format is: <current period lost>/<total lost> Link: http://lkml.kernel.org/n/tip-3emb7g87k872rbr4pzmc4...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/builtin-top.c | 27 +++++++++++++++++++++++++++ tools/perf/ui/browsers/hists.c | 4 ++++ tools/perf/util/top.c | 6 +++--- tools/perf/util/top.h | 2 +- 4 files changed, 35 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index aa0c73e57924..047e99de09f3 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -800,6 +800,29 @@ static void perf_event__process_sample(struct perf_tool *tool, addr_location__put(&al); } +static void +perf_top__process_lost(struct perf_top *top, union perf_event *event, + struct perf_evsel *evsel) +{ + struct hists *hists = evsel__hists(evsel); + + top->lost += event->lost.lost; + top->lost_total += event->lost.lost; + hists->stats.total_lost += event->lost.lost; +} + +static void +perf_top__process_lost_samples(struct perf_top *top, + union perf_event *event, + struct perf_evsel *evsel) +{ + struct hists *hists = evsel__hists(evsel); + + top->lost += event->lost_samples.lost; + top->lost_total += event->lost_samples.lost; + hists->stats.total_lost_samples += event->lost_samples.lost; +} + static void perf_top__mmap_read_idx(struct perf_top *top, int idx) { struct record_opts *opts = &top->record_opts; @@ -865,6 +888,10 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx) if (event->header.type == PERF_RECORD_SAMPLE) { perf_event__process_sample(&top->tool, event, evsel, &sample, machine); + } else if (event->header.type == PERF_RECORD_LOST) { + perf_top__process_lost(top, event, evsel); + } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) { + perf_top__process_lost_samples(top, event, evsel); } else if (event->header.type < PERF_RECORD_MAX) { hists__inc_nr_events(evsel__hists(evsel), event->header.type); machine__process_event(machine, event, &sample); diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index a96f62ca984a..ae208c16c8a3 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -2219,6 +2219,10 @@ static int hists_browser__scnprintf_title(struct hist_browser *browser, char *bf if (!is_report_browser(hbt)) { struct perf_top *top = hbt->arg; + printed += scnprintf(bf + printed, size - printed, + " lost: %" PRIu64 "/%" PRIu64, + top->lost, top->lost_total); + if (top->zero) printed += scnprintf(bf + printed, size - printed, " [z]"); } diff --git a/tools/perf/util/top.c b/tools/perf/util/top.c index 8e517def925b..e6582fa6a4db 100644 --- a/tools/perf/util/top.c +++ b/tools/perf/util/top.c @@ -46,8 +46,8 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size) samples_per_sec; ret = SNPRINTF(bf, size, " PerfTop:%8.0f irqs/sec kernel:%4.1f%%" - " exact: %4.1f%% [", samples_per_sec, - ksamples_percent, esamples_percent); + " exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " [", samples_per_sec, + ksamples_percent, esamples_percent, top->lost, top->lost_total); } else { float us_samples_per_sec = top->us_samples / top->delay_secs; float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs; @@ -113,5 +113,5 @@ void perf_top__reset_sample_counters(struct perf_top *top) { top->samples = top->us_samples = top->kernel_samples = top->exact_samples = top->guest_kernel_samples = - top->guest_us_samples = 0; + top->guest_us_samples = top->lost = 0; } diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index 9add1f72ce95..1fbcbd79720a 100644 --- a/tools/perf/util/top.h +++ b/tools/perf/util/top.h @@ -22,7 +22,7 @@ struct perf_top { * Symbols will be added here in perf_event__process_sample and will * get out after decayed. */ - u64 samples; + u64 samples, lost, lost_total; u64 kernel_samples, us_samples; u64 exact_samples; u64 guest_us_samples, guest_kernel_samples; -- 2.17.2
