From 6acd8e9271cdeaec458fd4eec4a6765d16e0e61c Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 25 Nov 2015 16:36:54 +0100 Subject: [PATCH] perf stat: Clear sample_(type|period) for counting Clear sample_(type|period) for counting, as it only confuses debug output with unwanted sampling details: Before: $ sudo perf stat -e 'raw_syscalls:sys_enter' -vv ls ------------------------------------------------------------ perf_event_attr: type 2 size 112 config 0x11 { sample_period, sample_freq } 1 sample_type TIME|CPU|PERIOD|RAW read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ... After: $ sudo perf stat -e 'raw_syscalls:sys_enter' -vv ls ------------------------------------------------------------ perf_event_attr: type 2 size 112 config 0x11 read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 enable_on_exec 1 exclude_guest 1 ... Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1448465815-27404-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-stat.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index e77880b5094d..df2fbf046ee2 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -161,6 +161,13 @@ static int create_perf_stat_counter(struct perf_evsel *evsel) attr->inherit = !no_inherit; + /* + * Some events get initialized with sample_(period/type) set, + * like tracepoints. Clear it up for counting. + */ + attr->sample_period = 0; + attr->sample_type = 0; + if (target__has_cpu(&target)) return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); -- GitLab