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perf top: Save and display the drop count stats

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Add drop count to 'perf top' headers:

  # perf top --stdio
   PerfTop:    3549 irqs/sec  kernel:51.8%  exact: 100.0% lost: 0/0 drop: 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 drop: 0/0

The format is: <current period drop>/<total drop>

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-2lj87zz8tq9ye1ntax3ulw0n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2018-11-11 20:02:46 +01:00
committed by Arnaldo Carvalho de Melo
parent d63b9f6fea
commit 97f7e0b33d
4 changed files with 13 additions and 5 deletions
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2
tools/perf/util/top.h
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@@ -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, lost, lost_total;
u64 samples, lost, lost_total, drop, drop_total;
u64 kernel_samples, us_samples;
u64 exact_samples;
u64 guest_us_samples, guest_kernel_samples;