On Mon, Jul 09, 2018 at 12:16:27PM -0400, valdis.kletnieks@xxxxxx wrote: > On Mon, 09 Jul 2018 19:34:44 +0530, Himanshu Jha said: > > > I think for these benchmarking stuff, to evaluate the cycles and time > > correctly you should use the __rdtscp(more info at "AMD64 Architecture > > Programmer???s Manual Volume 3: General-Purpose and System Instructions" > > Pg 401) > > Just beware that many Intel (and maybe some AMD) chipsets have a non-constant > TSC frequency. Check /proc/cpuinfo for 'constant_tsc' before relying on the value. How about setting "performance" governor[1] for all CPUs ? Would that work ? I mean no throttle down, but not sure if we have a constant cpufreq. Something like the following script: for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do [ -f $CPUFREQ ] || continue; echo -n performance > $CPUFREQ; done [1] https://www.kernel.org/doc/html/v4.14/admin-guide/pm/cpufreq.html#performance -- Himanshu Jha Undergraduate Student Department of Electronics & Communication Guru Tegh Bahadur Institute of Technology _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
