Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758895AbYBRLGD (ORCPT ); Mon, 18 Feb 2008 06:06:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756811AbYBRLFx (ORCPT ); Mon, 18 Feb 2008 06:05:53 -0500 Received: from wa-out-1112.google.com ([209.85.146.179]:62703 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753190AbYBRLFw (ORCPT ); Mon, 18 Feb 2008 06:05:52 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=cZxcb5VExlMRiByRwY4p0RgRdl+TlDlC4ELByOyuloMgLKl1YkAgrzTq1rxUNtQ7dkr2NYTQu21m5nRGLDo/L95KrWCjNanESjACtJrZt9xtDsSdJhXFORlJCF7ybVxmczV/Lzh31enLzKDivR9wUUeZJd+ktvChig6knEnu3xk= Message-ID: <661de9470802180305j1b24e5aeg70453dad991f3e05@mail.gmail.com> Date: Mon, 18 Feb 2008 16:35:52 +0530 From: "Balbir Singh" To: "Dhaval Giani" Subject: Re: sched-devel latencies Cc: "Ingo Molnar" , "Peter Zijlstra" , "Srivatsa Vaddagiri" , "Aneesh Kumar KV" , efault@gmx.de, lkml In-Reply-To: <20080218110121.GB18817@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080218104933.GA18817@linux.vnet.ibm.com> <20080218110121.GB18817@linux.vnet.ibm.com> X-Google-Sender-Auth: ce8f5b7523db7df1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1728 Lines: 51 On Feb 18, 2008 4:31 PM, Dhaval Giani wrote: > On Mon, Feb 18, 2008 at 04:19:33PM +0530, Dhaval Giani wrote: > > Hi Ingo, > > > > I am running the sched-devel tree (at HEAD > > 44e770a8750abc7e876076cda718b413bad9e654) and it is not looking good. > > > > I am running two "make -j"s for the kernel in two different cgroups and > > interactivity is going for a toss. I can see noticable lags in > > keypresses. > > > > Will get down to debugging it further a bit later on. > > > > Some more numbers, with exact scenario > > 1. Mount the cgroup > 2. Make 3 groups > 3. Start kernbench in each group > 4. Start chew. > > This is the chew output from the root cgroup > > [root@llm11 dhaval]# ./chew2 > pid 29345 preempted 544115 us after 1560 us > pid 29345 preempted 588109 us after 3935 us > pid 29345 preempted 632122 us after 3941 us > pid 29345 preempted 794259 us after 3954 us > pid 29345 preempted 972163 us after 3963 us > pid 29345 preempted 1024219 us after 3942 us > > From within one of the groups > [root@llm11 dhaval]# ./chew2 > pid 27961 preempted 4028 us after 1708 us > pid 27961 preempted 28090 us after 5466 us > pid 27961 preempted 52021 us after 6505 us > pid 27961 preempted 56100 us after 7183 us > pid 27961 preempted 61850 us after 7505 us > pid 27961 preempted 131892 us after 59 us > pid 27961 preempted 332112 us after 7607 us > Is there anything to compare this data against? Was it better earlier, if so which release? Balbir -- 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/