From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx140.postini.com [74.125.245.140]) by kanga.kvack.org (Postfix) with SMTP id 681E16B0002 for ; Sun, 3 Feb 2013 20:03:42 -0500 (EST) Received: by mail-ie0-f176.google.com with SMTP id k13so3358007iea.21 for ; Sun, 03 Feb 2013 17:03:41 -0800 (PST) Message-ID: <1359939818.9366.1.camel@kernel.cn.ibm.com> Subject: Re: [PATCHv4 0/7] zswap: compressed swap caching From: Simon Jeons Date: Sun, 03 Feb 2013 19:03:38 -0600 In-Reply-To: <510BDB8F.5000104@linux.vnet.ibm.com> References: <1359495627-30285-1-git-send-email-sjenning@linux.vnet.ibm.com> <1359682784.3574.2.camel@kernel> <510BDB8F.5000104@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Seth Jennings Cc: Andrew Morton , Greg Kroah-Hartman , Nitin Gupta , Minchan Kim , Konrad Rzeszutek Wilk , Dan Magenheimer , Robert Jennings , Jenifer Hopper , Mel Gorman , Johannes Weiner , Rik van Riel , Larry Woodman , Benjamin Herrenschmidt , Dave Hansen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org On Fri, 2013-02-01 at 09:13 -0600, Seth Jennings wrote: > On 01/31/2013 07:39 PM, Simon Jeons wrote: > > Hi Seth, > > On Tue, 2013-01-29 at 15:40 -0600, Seth Jennings wrote: > > >> Performance, Kernel Building: > >> > >> Setup > >> ======== > >> Gentoo w/ kernel v3.7-rc7 > >> Quad-core i5-2500 @ 3.3GHz > >> 512MB DDR3 1600MHz (limited with mem=512m on boot) > >> Filesystem and swap on 80GB HDD (about 58MB/s with hdparm -t) > >> majflt are major page faults reported by the time command > >> pswpin/out is the delta of pswpin/out from /proc/vmstat before and after > >> then make -jN > >> > >> Summary > >> ======== > >> * Zswap reduces I/O and improves performance at all swap pressure levels. > >> > >> * Under heavy swaping at 24 threads, zswap reduced I/O by 76%, saving > >> over 1.5GB of I/O, and cut runtime in half. > > > > How to get your benchmark? > > It's just kernel building. So "make" :) > > I intentionally choose this workload so people wouldn't have to jump > through hoops to replicate the results. Since there already have zram which can handle anonymous pages compression, why need zswap? What's the difference of design between zram and zswap? > > Seth > -- 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/ . Don't email: email@kvack.org