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Date: Tue, 25 Dec 2007 06:36:54 +0200 From: "Denys Fedoryshchenko" <denys@...p.net.lb> To: linux-kernel@...r.kernel.org Subject: nmi_watchdog killing tickless feature Hi Please CC me on reply, i am not subscribed to list. I did small test, and notice that if nmi_watchdog is enabled mpstat 1 06:11:00 CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 06:11:01 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 993.07 06:11:02 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 1007.00 06:11:03 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 1005.00 if disabled 06:13:52 CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 06:13:53 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 1.00 06:13:54 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 9.00 06:13:55 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 4.00 06:13:56 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 2.00 06:13:57 all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 2.00 The difference is huge, probably in power consumption too. Kernel is relatively standard (2.6.24-rc6-git1), if required i can attach .config If it is not bug, probably good to document, that it is killing powersaving features? -- Denys Fedoryshchenko Technical Manager Virtual ISP S.A.L. -- 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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