On Fri, Aug 28, 2015 at 05:48:07AM -0400, Kan Liang wrote: > From: Kan Liang <[email protected]> > > The group read results from cycles/ref-cycles/TSC/ASTATE/MSTATE event > can be used to calculate the frequency, CPU Utilization and percent > performance during each sampling period. > This patch shows them in report -D. > > Here is an example: > > $ perf record -e > '{cycles,ref-cycles,msr/tsc/,msr/mperf/,msr/aperf/}:S' ~/tchain_edit
so this perf cord set of events is set when you want to get the freq data/ratios.. I think we should not force user to specify this on command line and provide short option for that like $ perf record --freq ~/tchain_edit we already do this in perf stat for transactions.. you can also check the existence of particular events and warn user appropriatelly if any is missing jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
