On Thu, Mar 31, 2016 at 7:55 PM, Srinivas Pandruvada <srinivas.pandruv...@linux.intel.com> wrote: > On Thu, 2016-03-31 at 19:27 +0200, Jörg Otte wrote: >> 2016-03-31 17:43 GMT+02:00 Rafael J. Wysocki <r...@rjwysocki.net>: >> > On Thursday, March 31, 2016 05:25:18 PM Jörg Otte wrote: >> > > 2016-03-31 13:42 GMT+02:00 Rafael J. Wysocki <r...@rjwysocki.net>: >> > > > On Thursday, March 31, 2016 11:05:56 AM Jörg Otte wrote: >> > > >
[cut] >> >> OK, patch is applied. >> After some configurations and compilations I'm there. >> Under pstate_sample I see: >> enable filter format id trigger >> >> what to do now ? (never did tracing before)' > > # cd /sys/kernel/debug/tracing/ > # echo 1 > events/power/pstate_sample/enable > # echo 1 > events/power/cpu_frequency/enable > # cat trace > Send us the trace file. Here's what I do, for completeness: # echo 0 > /sys/kernel/debug/tracing/tracing_on # echo global > /sys/kernel/debug/tracing/trace_clock # echo nop > /sys/kernel/debug/tracing/current_tracer # echo 1000 > /sys/kernel/debug/tracing/buffer_size_kb # echo 1 > /sys/kernel/debug/tracing/events/power/pstate_sample/enable # echo "" > /sys/kernel/debug/tracing/trace # echo 1 > /sys/kernel/debug/tracing/tracing_on Then, (after a while) make a copy of the trace file.
