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Date: Fri, 11 Jul 2014 18:57:10 +0200 From: Pavel Machek <pavel@....cz> To: Stratos Karafotis <stratosk@...aphore.gr> Cc: rjw@...ysocki.net, viresh.kumar@...aro.org, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 2/2] cpufreq: ondemand: Eliminate the deadband effect Hi! > Tested on Intel i7-3770 CPU @ 3.40GHz and on ARM quad core 1500MHz Krait > (Android smartphone). > Benchmarks on Intel i7 shows a performance improvement on low and medium > work loads with lower power consumption. Specifics: > > Phoronix Linux Kernel Compilation 3.1: > Time: -0.40%, energy: -0.07% > Phoronix Apache: > Time: -4.98%, energy: -2.35% > Phoronix FFMPEG: > Time: -6.29%, energy: -4.02% Hmm. Intel i7 should be race-to-idle machine. So basically rule like if (load > 0) go to max frequency else go to lowest frequency would do the right thing in your test, right? So... should we do that, or do we need better benchmark? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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