Hi Stratos, On 4 April 2013 05:00, Stratos Karafotis <stratosk@xxxxxxxxxxxx> wrote: > I tried to do some measurements simulating a CPU load with a loop that simply counts > an integer. The first test simulates a CPU load that lasts 2 x sampling_rate = ~ 20000us. > The second ~40000us and the third ~60000us. > There are 5 runs in each test. In each run the benchmark program counts 20 times with > early_demand off and 20 times with early_demand on and takes the average times. > > I run the benchmark program on 3.9-rc5 + early_demand patch. My CPU is the i7-3770 @ 3.40 GHz > > Please find below the results, and the benchmark code attached. > Please note, that the idea of this patch is to push the CPU to max frequency few sampling > periods (1 in most cases) earlier for a more responsive system. Yes, your results show some improvements. BUT if performance is the only thing we were looking for, then we will never use ondemand governor but performance governor. I suspect this little increase in performance must have increased power numbers too (significantly). So, if you can get numbers in the form of power/performance with and without your patch, it will be great. -- viresh -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
