From: Jiri Olsa <[email protected]> Currently we display the "Too slow to read ring buffer.." helpline only in the slow reader thread. This patch triggers it also when the processing thread drops samples, because it has the same reason, which is too many data on input.
Acked-by: David S. Miller <[email protected]> Acked-by: Namhyung Kim <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Jiri Olsa <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/builtin-top.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 9166f6087e3f..f22c531be366 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -571,7 +571,7 @@ static void perf_top__sort_new_samples(void *arg) hists__collapse_resort(hists, NULL); perf_evsel__output_resort(evsel, NULL); - if (t->lost) + if (t->lost || t->drop) pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n"); perf_top__reset_sample_counters(t); -- 2.19.2
