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| author |   Jiri Olsa <jolsa@kernel.org> | 2018-11-06 15:45:14 +0100 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-17 14:57:36 -0300 |
| commit | d24e3c98ac11b941669885cc09d88b3b970e9d66 (patch) | |
| tree | b21fc9e0d45e4cb113eba4bbdddd5dc3b4685f1a /tools/perf/util/top.c | |
| parent | perf ordered_events: Add private data member (diff) | |
| download | linux-dev-d24e3c98ac11b941669885cc09d88b3b970e9d66.tar.xz linux-dev-d24e3c98ac11b941669885cc09d88b3b970e9d66.zip | |
perf top: Save and display the lost count stats
Add a '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>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/n/tip-zo11rn270gij5jtp8fknpf8u@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/top.c')
| -rw-r--r-- | tools/perf/util/top.c | 6 |
1 files changed, 3 insertions, 3 deletions
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; } |