From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-2?Q?Rafa=B3_Bilski?= Subject: Re: [Bug 8243] Problem with Throttling and CPU power state Date: Mon, 27 Aug 2007 22:27:11 +0200 Message-ID: <46D3339F.3090203@interia.pl> References: <20070827194633.5278D108078@picon.linux-foundation.org> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20070827194633.5278D108078@picon.linux-foundation.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="iso-8859-9"; format="flowed" To: akolisek@linuxx.hyperlinx.cz Cc: cpufreq@www.linux.org.uk > This bug is present in kernel 2.6.22(.1,2,3,4,5) too :( I don't get it. Where is the bug? > Why my CPU is not in C1 state, when works on 100%? And where is C0 state? C0 means that CPU is working so it isn't listed. I think that You have misunderstood this file. It isn't printing current=20 CPU state. It is listing all available sleep states in order from=20 low latency and higher power consumption to high latency and lower power=20 consumption. Star means state that will be used when CPU become idle.=20 "Latency" means time needed to enter sleep state and time needed to wakeup = when something will happen (interrupt or BM DMA for example). So it is=20 perfectly OK to use C4 when there it isn't much to do and C2 when CPU is=20 spending less time sleeping. Kernel compilation isn't causing 100% CPU usage. Processor is sleeping=20 during I/O wait. Well, unless You are using -j2 or higher. > state T4 is activated, but only a few seconds and then it goes back to T0= . Is > this ok? Yes. BIOS option "use throttling to rescue CPU when it is overheating"=20 interfering. Regards Rafa=B3 ---------------------------------------------------------------------- Jak najszybciej dostac sie na wymarzona plaze? Znajdz trase ekspresowa >>>http://link.interia.pl/f1b0c