Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 1/2] perf stat: Clear sample_(type|period) for counting | Date | Wed, 25 Nov 2015 16:36:54 +0100 |
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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 ...
Link: http://lkml.kernel.org/n/tip-cmf4xlq43o2i28a2nhex7bik@git.kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- 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)); -- 2.4.3
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