On Mon, Jul 17, 2017 at 01:37:58PM +0200, Jiri Olsa wrote: > On Fri, Jul 14, 2017 at 10:22:49AM -0700, Andi Kleen wrote: > > Jiri Olsa <[email protected]> writes: > > > > > > Setting the reset field to 0 for freq events. > > > > Looks good to me. > > > > Reviewed-by: Andi Kleen <[email protected]> > > > > BTW I suspect there's a related bug that > > > > perf record -e '{cycles:pp,branches}:S' .. > > > > would enable multi record PEBS, even though it shouldn't because > > we need the PMI to read the other events. > > there's PERF_SAMPLE_READ om cycles's sample_type for this example > so it won't pass the x86_pmu::free_running_flags filter
Good thanks for checking. > > also PERF_SAMPLE_TIME and PERF_SAMPLE_PERIOD will be set > in your example which will prevent that, but those > could be unset via record's '-c xxxx' and '--no-timestamp' PERF_SAMPLE_TIME works with Skylake/goldmont, but yes forgot the -c. -Andi
