Justin Bailey wrote: > Greetings! > > As part of a class project, I am interested in measuring the power vs. > performance of various cpufreq governors. On LessWatts.Org, there is a > page about a Power and Performance project[1]. Are the tests used > available for download somewhere? They make mention of a Kernel > Performance Project[2], but I don't see where that project is > measuring any power either. > > Any info is much appreciated! I will be sure to post my results back here. > > Justin > > [1] http://www.lesswatts.org/projects/power-performance/ > [2] http://kernel-perf.sourceforge.net/ > > _______________________________________________ > Discuss mailing list > [email protected] > http://mail.lesswatts.org/mailman/listinfo/discuss > Powertop will report battery usage in Watts for laptops which implement it (remember to unplug the power cable first!)
It may be that other software deliberately doesn't include this, because it's designed to be used with a special power measuring device. That presumably avoids issues with variable battery management implementations, makes it easier to compare across different computers, and allows desktops to be tested as well. Though it does mean you have to test with the power cable _plugged in_, which can make a difference on some laptops (when unplugged, some BIOS's will automatically switch some hardware to low power mode; I'm thinking of something like enabling CPU C4 deep sleep, though that shouldn't affect raw power/performance figuires). I don't know about the performance side of the tests though. Alan _______________________________________________ Discuss mailing list [email protected] http://mail.lesswatts.org/mailman/listinfo/discuss
