Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 25 Sep 2002 18:09:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 25 Sep 2002 18:09:16 -0400 Received: from air-2.osdl.org ([65.172.181.6]:10254 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id ; Wed, 25 Sep 2002 18:09:14 -0400 Message-Id: <200209252214.g8PMEQd06269@mail.osdl.org> X-Mailer: exmh version 2.2 06/23/2000 with nmh-1.0.4 To: Con Kolivas cc: linux-kernel@vger.kernel.org, Andrew Morton , cliffw@osdl.org Subject: Re: [BENCHMARK] fork_load module tested for contest In-Reply-To: Message from Con Kolivas of "Thu, 26 Sep 2002 00:42:16 +1000." <1032964936.3d91cb48b1cca@kolivas.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 25 Sep 2002 15:14:26 -0700 From: Cliff White Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2028 Lines: 54 > > > I've been trialling a new load module for the contest benchmark > (http://contest.kolivas.net) which simply forks a process that does nothing, > waits for it to die, then repeats. Here are the results I have obtained so far: > > noload: > Kernel Time CPU Ratio > 2.4.19 72.90 99% 1.00 > 2.4.19-ck7 71.55 100% 0.98 > 2.5.38 73.86 99% 1.01 > 2.5.38-mm2 73.93 99% 1.01 > > fork_load: > Kernel Time CPU Ratio > 2.4.19 100.05 69% 1.37 > 2.4.19-ck7 74.65 95% 1.02 > 2.5.38 77.35 95% 1.06 > 2.5.38-mm2 76.99 95% 1.06 > > ck7 uses O1, preempt, low latency > Preempt=N for all other kernels > > Clearly you can see the 2.5 kernels have a substantial lead over the current > stable kernel. > > This load module is not part of the contest package yet. I could certainly > change it to fork n processes but I'm not really sure just how many n should be. I think for OSDL/STP, it would be nice if n == number of CPU's, so maybe make 'n' an arg? When you say the process 'does nothing', what do you mean? It forks, then the child does exit() ? cliffw > > Comments? > > Con Kolivas > > P.S. Results have negligible differences on repeat testing. > - > 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/ > - 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/