Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262130AbVDVVGm (ORCPT ); Fri, 22 Apr 2005 17:06:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262131AbVDVVGm (ORCPT ); Fri, 22 Apr 2005 17:06:42 -0400 Received: from fmr18.intel.com ([134.134.136.17]:59074 "EHLO orsfmr003.jf.intel.com") by vger.kernel.org with ESMTP id S262130AbVDVVGi (ORCPT ); Fri, 22 Apr 2005 17:06:38 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <17001.26444.246648.14231@sodium.jf.intel.com> Date: Fri, 22 Apr 2005 14:06:20 -0700 To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Daniel Walker Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-01 In-Reply-To: <20050422073408.GA5470@elte.hu> References: <20050325145908.GA7146@elte.hu> <20050331085541.GA21306@elte.hu> <20050401104724.GA31971@elte.hu> <20050405071911.GA23653@elte.hu> <20050421073537.GA1004@elte.hu> <20050422062714.GA23667@elte.hu> <20050422073408.GA5470@elte.hu> X-Mailer: VM 7.19 under Emacs 21.3.1 From: Inaky Perez-Gonzalez Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1767 Lines: 67 >>>>> Ingo Molnar writes: >> this includes fixes from Daniel Walker, which could fix the plist >> related slowdown bugs: > there are still some problems remaining: i just ran Esben Nielsen's > priority-inheritance validation testsuite, and the plist code gives > a worst-case latency of 9.0 msecs. With which machine is this? I tried to reproduce with V0.7.45-01 in my 2xPIII 0.9 Ghz I cannot get more than 1.9ms when doing 2000 samples repeatedly (60 iterations and counting). Did you use other parameters to 'test'? # cnt=0 # while true > do echo -n "$cnt " > ./test --samples 2000 file.hist 2>&1 | grep maximum; cnt=$(($cnt+1)) > done With 2.6.12-rc3-V0.7.46-02 I get: ... 2 maximum cycle time: 0.003ms 3 maximum cycle time: 1.706ms 4 maximum cycle time: 1.538ms 5 maximum cycle time: 1.168ms 6 maximum cycle time: 0.003ms 7 maximum cycle time: 0.008ms 8 maximum cycle time: 1.821ms 9 maximum cycle time: 1.013ms 10 maximum cycle time: 1.043ms 11 maximum cycle time: 1.787ms 12 maximum cycle time: 1.519ms 13 ... roughly the same as with 0.7.45-01: 0 maximum cycle time: 1.872ms 1 maximum cycle time: 0.008ms 2 maximum cycle time: 1.947ms 3 maximum cycle time: 1.902ms 4 maximum cycle time: 1.925ms 5 maximum cycle time: 0.002ms 6 maximum cycle time: 1.950ms 7 maximum cycle time: 0.008ms 8 maximum cycle time: 0.008ms 9 maximum cycle time: 0.008ms 10 maximum cycle time: 1.943ms 11 maximum cycle time: 1.173ms 12 maximum cycle time: 0.008ms 13 maximum cycle time: 0.008ms ... -- Inaky - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/