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Date: Fri, 10 Sep 2010 23:54:51 +0900 From: Norbert Preining <preining@...ic.at> To: "Shi, Alex" <alex.shi@...el.com> Cc: Peter Zijlstra <peterz@...radead.org>, "Chen, Tim C" <tim.c.chen@...el.com>, "arjan@...radead.org" <arjan@...radead.org>, "efault@....de" <efault@....de>, "Li, Shaohua" <shaohua.li@...el.com>, tglx <tglx@...utronix.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: high power consumption in recent kernels On Fr, 10 Sep 2010, Shi, Alex wrote: > In the powertop source code, the "extra timer interrupt" come from /proc/timer_stats. If my understanding is correct, so many "extra timer interrupt" and the nohz_ratemlimit checking make your system can not go to deep C states. but don't know what the effect for "load balancing tick" come from "extra timer interrupt". So maybe reduce the "extra timer interrupt" is helpful on your system. Could you like to try this? Can you be more specific how to do that? - revert the nohz patch (can you send me a patch for that) - how to reduce the "extra timer interrupt"? Thanks Best wishes Norbert ------------------------------------------------------------------------ Norbert Preining preining@...ist.ac.jp, logic.at, debian.org} JAIST, Japan TeX Live & Debian Developer DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094 ------------------------------------------------------------------------ CAIRNPAT (n.) A large piece of dried dung found in mountainous terrain above the cowline which leads the experienced tracker to believe that hikers have recently passed. --- Douglas Adams, The Meaning of Liff -- 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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