From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754325Ab0H3ICn (ORCPT ); Mon, 30 Aug 2010 04:02:43 -0400 Received: from mailout-de.gmx.net ([213.165.64.22]:35085 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1750760Ab0H3ICl (ORCPT ); Mon, 30 Aug 2010 04:02:41 -0400 X-Authenticated: #8143315 X-Provags-ID: V01U2FsdGVkX18JV057lQgJ97ENgTvdToaubDIwP2G20hE4z/253e noxGrHQqxhp4dU Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes Subject: regression in 2.6.35.4 'load is to heavy (video subsystem?)' To: "linux-kernel@vger.kernel.org" Date: Mon, 30 Aug 2010 10:02:36 +0200 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit FROM: Karsten Mehrhoff Message-ID: User-Agent: Opera Mail/10.62 (Linux) X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Using the same .config from 2.6.35.3 to compile 2.5.36.4 results in a heavy load with 2.6.35.4. Example: Difference between 2.6.35.1/2/3 and 2.6.35.4 while watching some videos: 2.6.35.4 switches the cpu for flash videos in the browser (opera or iceweasel) or other video outputs to 2200/2400/2600 MHz meanwhile 2.6.35.3 (or older) stays at 1000 Mhz. That results in a higher cpu temperature, more power consumption and so one. Using other GUI program results in nearly the same problems with 2.6.35.4, so this kernel is unusable for me. Results to see the difference for the same action 2.6.35.4 Core0 Temp: +45.0°C Core1 Temp: +43.0°C cpu MHz: 2200.000 or higher 2.6.35.3 Core0 Temp: +32.0°C Core1 Temp: +31.0°C cpu MHz: 1000.000 (max. 1800, but falling back to 1000) kernel compiled with 'CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y' results for me in 1000, 1800, 2000, 2200, 2400, 2600 MHz. I'm not the only one with this problem, other users experienced the same behavior on other systems on 386 systems, i.e. a regression for glxgears about 30% on slower systems. We all uses differnet AMD cpus and nNida graphic controllers. Same results for the nvidia-kernel from the repos or the nVidia driver from nvidia.com. There must something be wrong in the video subsystem, which is causing this regression. My system (overview using 2.5.35.3): ===================== Processor: 2x AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ Memory: 4060MB Display Resolution: 1920x1080 pixels OpenGL Renderer: GeForce 9500 GT/PCI/SSE2 X11 Vendor: The X.Org Foundation Version: 1.7.7 Version Kernel: Linux 2.6.35.3-kmt (x86_64) Compiled: SMP Mon Aug 23 00:58:37 CEST 2010 C Library: GNU C Library version 2.11.2 (stable) Default C Compiler: GNU C Compiler version 4.4.5 20100824 (prerelease) (Debian 4.4.4-11) Distribution: Debian GNU/Linux squeeze/sid OpenGL Vendor: NVIDIA Corporation Renderer: GeForce 9500 GT/PCI/SSE2 Version: 3.3.0 NVIDIA 256.44 Direct Rendering: Yes Regards Karsten --