From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id 122476B0093 for ; Mon, 13 Dec 2010 21:36:13 -0500 (EST) Received: by iyj17 with SMTP id 17so77600iyj.14 for ; Mon, 13 Dec 2010 18:36:12 -0800 (PST) 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 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org To: Ben Gamari Cc: KOSAKI Motohiro , Andrew Morton , Rik van Riel , linux-mm , LKML , Wu Fengguang , Johannes Weiner , Nick Piggin List-ID: 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 w= rote: >> In summary, my patch enhances a littie bit about elapsed time in >> memory pressure environment and enhance reclaim effectivness(reclaim/rec= laim) >> 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. =A0Is 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 > --=20 Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org