From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: cpu governor ondemand issue Date: Mon, 29 Oct 2007 00:02:43 -0700 Message-ID: <20071029000243.9101d363.akpm@linux-foundation.org> References: <200710211316.14955.toralf.foerster@gmx.de> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <200710211316.14955.toralf.foerster@gmx.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="iso-8859-1" To: Toralf =?ISO-8859-1?B?RvZyc3Rlcg==?= Cc: linux-kernel@vger.kernel.org, cpufreq@www.linux.org.uk On Sun, 21 Oct 2007 13:16:14 +0200 Toralf F=F6rster wrote: > I use the following one liner for regression tests of the cpufreq gov= ernor and > friends: >=20 > tfoerste@n22 ~ $ time factor 819734028463158891 >=20 > which usually needs 5.5 secs to complete at 1.7 GHz of my pentium M p= rocessor. >=20 > 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.n= et client" > as a background process with nice level 19 b/c the cpu frequency stil= l stays > at 600 MHz. > After stopping dnetc the cpu frequency governor ondemand works as exp= ected again. >=20 > Tested at my ThinkPad T41 with stable Gentoo: >=20 > tfoerste@n22 ~ $ grep -e ^CONFIG_ACPI -e ^CONFIG_CPU_FREQ_GOV_ ~/deve= l/linux-2.6/.config > CONFIG_ACPI=3Dy > CONFIG_ACPI_SLEEP=3Dy > CONFIG_ACPI_PROCFS=3Dy > CONFIG_ACPI_PROC_EVENT=3Dy > CONFIG_ACPI_AC=3Dm > CONFIG_ACPI_BATTERY=3Dm > CONFIG_ACPI_BUTTON=3Dm > CONFIG_ACPI_VIDEO=3Dm > CONFIG_ACPI_FAN=3Dm > CONFIG_ACPI_PROCESSOR=3Dm > CONFIG_ACPI_THERMAL=3Dm > CONFIG_ACPI_BLACKLIST_YEAR=3D0 > CONFIG_ACPI_EC=3Dy > CONFIG_ACPI_POWER=3Dy > CONFIG_ACPI_SYSTEM=3Dy > CONFIG_CPU_FREQ_GOV_PERFORMANCE=3Dy > CONFIG_CPU_FREQ_GOV_POWERSAVE=3Dm > CONFIG_CPU_FREQ_GOV_ONDEMAND=3Dy >=20 And 2.6.23 was OK? Is this problem still present in Linus's current tree? Thanks.