From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933583AbXCaDml (ORCPT ); Fri, 30 Mar 2007 23:42:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933589AbXCaDml (ORCPT ); Fri, 30 Mar 2007 23:42:41 -0400 Received: from mail.gmx.net ([213.165.64.20]:49630 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S933583AbXCaDmk (ORCPT ); Fri, 30 Mar 2007 23:42:40 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX19hh0Ikmt9hpz73/nO905Ua+4IAcneh0yiSIG8+O3 mhL0ceL9vrG7bg Subject: Re: [test] hackbench.c interactivity results: vanilla versus SD/RSDL From: Mike Galbraith To: Xenofon Antidides Cc: Ingo Molnar , Con Kolivas , linux list , Andrew Morton In-Reply-To: <1175311424.6927.6.camel@Homer.simpson.net> References: <20070331023615.98478.qmail@web26704.mail.ukl.yahoo.com> <1175311424.6927.6.camel@Homer.simpson.net> Content-Type: text/plain Date: Sat, 31 Mar 2007 05:42:37 +0200 Message-Id: <1175312557.6927.14.camel@Homer.simpson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2007-03-31 at 05:23 +0200, Mike Galbraith wrote: > On Fri, 2007-03-30 at 19:36 -0700, Xenofon Antidides wrote: > > > Something different on many cpus? Sorry I was thinking > > something other. I try 50% run + 50% sleep on one cpu > > and mainline has big problem. Sorry for bad code I > > copy bits to make it work. Start program first then > > run bash 100% cpu (while : ; do : ; done). Try change > > program forks from 1 till 3 or more mainline kernel > > and bash gets 0%. > > top - 05:16:41 up 43 min, 13 users, load average: 9.51, 4.32, 5.67 > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ P COMMAND > 7146 root 15 0 1564 104 24 R 43 0.0 0:20.74 0 fiftypercent > 7142 root 15 0 1564 104 24 S 37 0.0 0:18.08 0 fiftypercent > 7140 root 15 0 1564 436 356 R 21 0.0 0:18.94 1 fiftypercent > 7144 root 15 0 1564 104 24 R 21 0.0 0:18.75 1 fiftypercent > 7143 root 15 0 1564 104 24 R 20 0.0 0:18.85 1 fiftypercent > 7145 root 15 0 1564 104 24 R 19 0.0 0:18.30 1 fiftypercent > 7147 root 15 0 1564 104 24 R 19 0.0 0:18.03 1 fiftypercent > 7141 root 16 0 1564 104 24 R 10 0.0 0:18.29 0 fiftypercent > 6245 root 16 0 3368 1876 1376 R 7 0.2 0:49.81 0 bash > > That's mainline with the below (which I'm trying various ideas to improve). Note: that's not an sh -c started at the same time as the 50% duty cycle dos, the pertinent data is that bash is getting into the loop. Yesterday, I piddled around with tracking interactive backlog as a way to detect when the load isn't really an interactive load, that's very simple and has potential. -Mike