From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751397AbWGMFfi (ORCPT ); Thu, 13 Jul 2006 01:35:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751405AbWGMFfi (ORCPT ); Thu, 13 Jul 2006 01:35:38 -0400 Received: from www.polish-dvd.com ([69.222.0.225]:9947 "HELO mail.webhostingstar.com") by vger.kernel.org with SMTP id S1751397AbWGMFfi (ORCPT ); Thu, 13 Jul 2006 01:35:38 -0400 Message-ID: <20060713052037.26594.qmail@mail.webhostingstar.com> From: "art" To: linux-kernel@vger.kernel.org Cc: venkatesh.pallipadi@intel.com, alexey.y.starikovskiy@intel.com, akpm@osdl.org Subject: cpufreq ondemand governor problem on SMP DUALCORE AMD Date: Thu, 13 Jul 2006 00:20:37 -0500 Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.6.18-rc1-git5-64-smp cpufreq ondemand governor problem on SMP DUALCORE AMD 64bit system - start 2 processes with infinite loop in each - OK both cores 100% utilization cpu speed max - kill one - BAD now one core utilization ~100% but cpu speed dropped to core with lowest utilization - fluctuating from min at this level depending on system activity. any possibility to setup ondemand governor for max speed if only 1 core utilization is maxed - full speed for single-process/single-thread activity ? looks like cpufreq ondemand governor sets two frequency dependent cores to speed level ok for that one with lowest utilization slowing down process/thread working on other core. For now it is ok for independent multiprocessor bad for multicore-freq-dependent. xboom art@usfltd.com (observe cpu-freq and utilization terminal-1: awk 'BEGIN {for(i=0;i<100000;i++)for(j=0;j<10000;j++);}' terminal-2: awk 'BEGIN {for(i=0;i<100000;i++)for(j=0;j<10000;j++);}' kill one awk)