Messages in this thread | | | Date | Wed, 23 Feb 2022 09:14:36 +0800 | From | Leo Yan <> | Subject | Re: [PATCH] perf arm-spe: Use advertised caps/min_interval as default sample_period |
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On Mon, Feb 21, 2022 at 05:10:42PM +0000, German Gomez wrote: > When recording SPE traces, the default sample_period is currently being > set to 1 in the perf_event_attr fields, instead of the value advertised > in '/sys/devices/arm_spe_0/caps/min_interval': > > Before: > > $ perf record -e arm_spe// -vv -- sleep 1 > [...] > { sample_period, sample_freq } 1 > [...] > > Use the value from the above sysfs location as a more sensible default > (it was already being read, but the value not being used) > > After: > > $ perf record -e arm_spe// -vv -- sleep 1 > [...] > { sample_period, sample_freq } 1024 > [...] > > Signed-off-by: German Gomez <german.gomez@arm.com>
The change looks good to me:
Reviewed-by: Leo Yan <leo.yan@linaro.org>
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