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Message-Id: <20071029000243.9101d363.akpm@linux-foundation.org> Date: Mon, 29 Oct 2007 00:02:43 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Toralf Förster <toralf.foerster@....de> Cc: linux-kernel@...r.kernel.org, cpufreq@....linux.org.uk Subject: Re: cpu governor ondemand issue On Sun, 21 Oct 2007 13:16:14 +0200 Toralf Förster <toralf.foerster@....de> wrote: > I use the following one liner for regression tests of the cpufreq governor and > friends: > > tfoerste@n22 ~ $ time factor 819734028463158891 > > which usually needs 5.5 secs to complete at 1.7 GHz of my pentium M processor. > > With the current git sources (commit cfa76f0 at Sat Oct 20 20:19:15 2007 -0700) > instead this command needs 3 times longer if I run the "distributed.net client" > as a background process with nice level 19 b/c the cpu frequency still stays > at 600 MHz. > After stopping dnetc the cpu frequency governor ondemand works as expected again. > > Tested at my ThinkPad T41 with stable Gentoo: > > tfoerste@n22 ~ $ grep -e ^CONFIG_ACPI -e ^CONFIG_CPU_FREQ_GOV_ ~/devel/linux-2.6/.config > CONFIG_ACPI=y > CONFIG_ACPI_SLEEP=y > CONFIG_ACPI_PROCFS=y > CONFIG_ACPI_PROC_EVENT=y > CONFIG_ACPI_AC=m > CONFIG_ACPI_BATTERY=m > CONFIG_ACPI_BUTTON=m > CONFIG_ACPI_VIDEO=m > CONFIG_ACPI_FAN=m > CONFIG_ACPI_PROCESSOR=m > CONFIG_ACPI_THERMAL=m > CONFIG_ACPI_BLACKLIST_YEAR=0 > CONFIG_ACPI_EC=y > CONFIG_ACPI_POWER=y > CONFIG_ACPI_SYSTEM=y > CONFIG_CPU_FREQ_GOV_PERFORMANCE=y > CONFIG_CPU_FREQ_GOV_POWERSAVE=m > CONFIG_CPU_FREQ_GOV_ONDEMAND=y > And 2.6.23 was OK? Is this problem still present in Linus's current tree? Thanks. - 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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