Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934211AbXEGO3G (ORCPT ); Mon, 7 May 2007 10:29:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934189AbXEGO3C (ORCPT ); Mon, 7 May 2007 10:29:02 -0400 Received: from main.gmane.org ([80.91.229.2]:36494 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934192AbXEGO3A (ORCPT ); Mon, 7 May 2007 10:29:00 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Bill Davidsen Subject: Re: swap-prefetch: 2.6.22 -mm merge plans Date: Mon, 07 May 2007 10:28:56 -0400 Message-ID: <463F37A8.1020009@tmr.com> References: <20070430162007.ad46e153.akpm@linux-foundation.org> <463AE1EB.1020909@yahoo.com.au> <20070504085201.GA24666@elte.hu> <200705042210.15953.kernel@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: mail.tmr.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061105 SeaMonkey/1.0.6 In-Reply-To: <200705042210.15953.kernel@kolivas.org> Cc: linux-mm@kvack.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1499 Lines: 26 Con Kolivas wrote: > On Friday 04 May 2007 18:52, Ingo Molnar wrote: >> agreed. Con, IIRC you wrote a testcase for this, right? Could you please >> send us the results of that testing? > > Yes, sorry it's a crappy test app but works on 32bit. Timed with prefetch > disabled and then enabled swap prefetch saves ~5 seconds on average hardware > on this one test case. I had many users try this and the results were between > 2 and 10 seconds, but always showed a saving on this testcase. This effect > easily occurs on printing a big picture, editing a large file, compressing an > iso image or whatever in real world workloads. Smaller, but much more > frequent effects of this over the course of a day obviously also occur and do > add up. > I'll try this when I get the scheduler stuff done, and also dig out the "resp1" stuff for "back when." I see the most recent datasets were comparing 2.5.43-mm2 responsiveness with 2.4.19-ck7, you know I always test your stuff ;-) Guess it might need a bit of polish for current hardware, I was testing on *small* machines, deliberately. -- Bill Davidsen "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot - 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/