Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261185AbUK0Kmf (ORCPT ); Sat, 27 Nov 2004 05:42:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261186AbUK0Kmf (ORCPT ); Sat, 27 Nov 2004 05:42:35 -0500 Received: from [213.85.13.118] ([213.85.13.118]:15232 "EHLO tau.rusteko.ru") by vger.kernel.org with ESMTP id S261185AbUK0Kmd (ORCPT ); Sat, 27 Nov 2004 05:42:33 -0500 From: Nikita Danilov MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16808.23030.312384.635657@gargle.gargle.HOWL> Date: Sat, 27 Nov 2004 13:41:58 +0300 To: Marcelo Tosatti Cc: Linux Kernel Mailing List , Andrew Morton , Linux MM Mailing List Subject: Re: [PATCH]: 1/4 batch mark_page_accessed() In-Reply-To: <20041126185833.GA7740@logos.cnet> References: <16800.47044.75874.56255@gargle.gargle.HOWL> <20041126185833.GA7740@logos.cnet> X-Mailer: VM 7.17 under 21.5 (patch 17) "chayote" (+CVS-20040321) XEmacs Lucid Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1090 Lines: 26 Marcelo Tosatti writes: [...] > > Average Half Load -j 4 Run: Average Half Load -j 4 Run: > Elapsed Time 274.916 Elapsed Time 245.026 > User Time 833.63 User Time 832.34 > System Time 73.704 System Time 73.41 > Percent CPU 335.8 Percent CPU 373.6 > Context Switches 12984.8 Context Switches 13427.4 > Sleeps 21459.2 Sleeps 21642 What is "System Time" here? Does in include CPU consumption by, say, kswapd? If not, then one may conjecture that mark_page_accessed batching modifies ordering of pages on zone "LRU" lists in a way that measurably changes efficiency of VM scanning, and mostly affects process that scans most---kswapd. Nikita. - 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/