Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755528Ab0LNCgO (ORCPT ); Mon, 13 Dec 2010 21:36:14 -0500 Received: from mail-iw0-f174.google.com ([209.85.214.174]:59962 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752157Ab0LNCgN convert rfc822-to-8bit (ORCPT ); Mon, 13 Dec 2010 21:36:13 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=lEHkE+rYmhFORFIuEjFW08rOr5+B9KRvMNxaueV56za+5xjs4Nl/ksMAm+jkgxzp3z j4p56PVSUO6BeIen67/5i6No1xLxluuU4ybuyGW6bHVYMJTTsb9pEKdl1tvOvM75OYdf X2IN8wJrEfsXW34+JyK9/DvEQaHmnxKzqfGW8= MIME-Version: 1.0 In-Reply-To: <87lj3t30a9.fsf@gmail.com> References: <0724024711222476a0c8deadb5b366265b8e5824.1291568905.git.minchan.kim@gmail.com> <20101208170504.1750.A69D9226@jp.fujitsu.com> <87oc8wa063.fsf@gmail.com> <20101213153105.GA2344@barrios-desktop> <87lj3t30a9.fsf@gmail.com> Date: Tue, 14 Dec 2010 11:36:12 +0900 Message-ID: Subject: Re: [PATCH v4 4/7] Reclaim invalidated page ASAP From: Minchan Kim To: Ben Gamari Cc: KOSAKI Motohiro , Andrew Morton , Rik van Riel , linux-mm , LKML , Wu Fengguang , Johannes Weiner , Nick Piggin Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1833 Lines: 55 Hi Ben, On Tue, Dec 14, 2010 at 5:06 AM, Ben Gamari wrote: > On Tue, 14 Dec 2010 00:31:05 +0900, Minchan Kim wrote: >> In summary, my patch enhances a littie bit about elapsed time in >> memory pressure environment and enhance reclaim effectivness(reclaim/reclaim) >> with x2. It means reclaim latency is short and doesn't evict working set >> pages due to invalidated pages. >> > Thank you very much for this testing! I'm very sorry I've been unable to > contribute more recently. My last exam is on Wednesday and besides some > grading that is the end of the semester. ?Is there anything you would No worry. I hope you have great grade in your exam. :) > like me to do? Perhaps reproducing these results on my setup would be > useful? Thanks very much if you do. > >> Look at reclaim effectivness. Patched rsync enhances x2 about reclaim >> effectiveness and compared to mmotm-12-03, mmotm-12-03-fadvise enhances >> 3 minute about elapsed time in stress environment. >> I think it's due to reduce scanning, reclaim overhead. >> > Good good. This looks quite promising. Thanks, Ben. > >> In no-stress enviroment, fadivse makes program little bit slow. >> I think because there are many pgfault. I don't know why it happens. >> Could you guess why it happens? >> > Hmm, nothing comes to mind. As I've said in the past, rsync should > require each page only once. Perhaps perf might offer some insight into > where this time is being spent? Maybe. I will have a plan to look into that. > > - Ben > -- Kind regards, Minchan Kim -- 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/