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SubjectRe: [PATCH] perf stat: Support --all-kernel/--all-user
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On 10/15/2019 12:23 AM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Oct 14, 2019 at 04:42:08PM +0200, Jiri Olsa escreveu:
>> On Fri, Oct 11, 2019 at 01:05:45PM +0800, Jin Yao wrote:
>>> perf record has supported --all-kernel / --all-user to configure all
>>> used events to run in kernel space or run in user space. But perf
>>> stat doesn't support these options.
>>>
>>> It would be useful to support these options in perf-stat too to keep
>>> the same semantics.
>>>
>>> Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
>>
>> Acked-by: Jiri Olsa <jolsa@kernel.org>
>
> What happens if one asks for both? From the patch only the --all-kernel
> will stick, right? Is that the behaviour for 'perf record'? Lemme see,
> as I recall having this discussion at that time...
>
> Yeah, same thing, and looking at that I wonder why we dong use
> perf_evsel__config() in 'perf stat'...
>
> Ok, I'm going to apply it.
>

Hi Arnaldo,

If we specify both, we will see the error.

root@kbl:~# perf stat --all-kernel --all-user -a -- sleep 1
Error: option `all-user' cannot be used with all-kernel

root@kbl:~# perf record --all-kernel --all-user -a -- sleep 1
Error: option `all-user' cannot be used with all-kernel

For why I don't set them in perf_evsel__config, because
perf_evsel__config is called in record but not called in stat.

Thanks for reviewing and applying this patch.

Thanks
Jin Yao

>> thanks,
>> jirka
>>
>>> ---
>>> tools/perf/Documentation/perf-stat.txt | 6 ++++++
>>> tools/perf/builtin-stat.c | 6 ++++++
>>> tools/perf/util/stat.c | 10 ++++++++++
>>> tools/perf/util/stat.h | 2 ++
>>> 4 files changed, 24 insertions(+)
>>>
>>> diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
>>> index 930c51c01201..a9af4e440e80 100644
>>> --- a/tools/perf/Documentation/perf-stat.txt
>>> +++ b/tools/perf/Documentation/perf-stat.txt
>>> @@ -323,6 +323,12 @@ The output is SMI cycles%, equals to (aperf - unhalted core cycles) / aperf
>>>
>>> Users who wants to get the actual value can apply --no-metric-only.
>>>
>>> +--all-kernel::
>>> +Configure all used events to run in kernel space.
>>> +
>>> +--all-user::
>>> +Configure all used events to run in user space.
>>> +
>>> EXAMPLES
>>> --------
>>>
>>> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
>>> index 468fc49420ce..c88d4e118409 100644
>>> --- a/tools/perf/builtin-stat.c
>>> +++ b/tools/perf/builtin-stat.c
>>> @@ -803,6 +803,12 @@ static struct option stat_options[] = {
>>> OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
>>> "monitor specified metrics or metric groups (separated by ,)",
>>> parse_metric_groups),
>>> + OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
>>> + "Configure all used events to run in kernel space.",
>>> + PARSE_OPT_EXCLUSIVE),
>>> + OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
>>> + "Configure all used events to run in user space.",
>>> + PARSE_OPT_EXCLUSIVE),
>>> OPT_END()
>>> };
>>>
>>> diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
>>> index ebdd130557fb..6822e4ffe224 100644
>>> --- a/tools/perf/util/stat.c
>>> +++ b/tools/perf/util/stat.c
>>> @@ -490,6 +490,16 @@ int create_perf_stat_counter(struct evsel *evsel,
>>> if (config->identifier)
>>> attr->sample_type = PERF_SAMPLE_IDENTIFIER;
>>>
>>> + if (config->all_user) {
>>> + attr->exclude_kernel = 1;
>>> + attr->exclude_user = 0;
>>> + }
>>> +
>>> + if (config->all_kernel) {
>>> + attr->exclude_kernel = 0;
>>> + attr->exclude_user = 1;
>>> + }
>>> +
>>> /*
>>> * Disabling all counters initially, they will be enabled
>>> * either manually by us or by kernel via enable_on_exec
>>> diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
>>> index edbeb2f63e8d..081c4a5113c6 100644
>>> --- a/tools/perf/util/stat.h
>>> +++ b/tools/perf/util/stat.h
>>> @@ -106,6 +106,8 @@ struct perf_stat_config {
>>> bool big_num;
>>> bool no_merge;
>>> bool walltime_run_table;
>>> + bool all_kernel;
>>> + bool all_user;
>>> FILE *output;
>>> unsigned int interval;
>>> unsigned int timeout;
>>> --
>>> 2.17.1
>>>
>

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