[PATCH v5 7/7] perf test: Add a test for default perf stat command

[James Clark]

On 30/08/2024 7:32 am, Namhyung Kim wrote:
> Hello,
> 
> On Wed, Aug 28, 2024 at 03:07:21PM +0100, James Clark wrote:
>> Test that one cycles event is opened for each core PMU when "perf stat"
>> is run without arguments.
>>
>> The event line can either be output as "pmu/cycles/" or just "cycles" if
>> there is only one PMU. Include 2 spaces for padding in the one PMU case
>> to avoid matching when the word cycles is included in metric
>> descriptions.
>>
>> Signed-off-by: James Clark <james.clark at linaro.org>
>> ---
>>   tools/perf/tests/shell/stat.sh | 21 +++++++++++++++++++++
>>   1 file changed, 21 insertions(+)
>>
>> diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
>> index 525d0c44fdc6..24ace1de71cc 100755
>> --- a/tools/perf/tests/shell/stat.sh
>> +++ b/tools/perf/tests/shell/stat.sh
>> @@ -148,6 +148,26 @@ test_cputype() {
>>     echo "cputype test [Success]"
>>   }
>>   
>> +test_hybrid() {
>> +  # Test the default stat command on hybrid devices opens one cycles event for
>> +  # each CPU type.
>> +  echo "hybrid test"
>> +
>> +  # Count the number of core PMUs
>> +  pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l)
> 
> Is it working on non-hybrid systems?  I don't think they have cpus file
> in the core PMU.
> 
> Thanks,
> Namhyung
> 

Good point I only tested on Arm non-hybrid. I can change it to assume 1 
PMU for no cpus files?