From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx192.postini.com [74.125.245.192]) by kanga.kvack.org (Postfix) with SMTP id 0E51E6B004D for ; Sat, 25 Feb 2012 00:34:09 -0500 (EST) Received: by bkty12 with SMTP id y12so3463363bkt.14 for ; Fri, 24 Feb 2012 21:34:07 -0800 (PST) Message-ID: <4F4872CC.1000702@openvz.org> Date: Sat, 25 Feb 2012 09:34:04 +0400 From: Konstantin Khlebnikov MIME-Version: 1.0 Subject: Re: [PATCH v3 00/21] mm: lru_lock splitting References: <20120223133728.12988.5432.stgit@zurg> <1330128354.13358.43.camel@schen9-DESK> In-Reply-To: <1330128354.13358.43.camel@schen9-DESK> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Tim Chen Cc: Hugh Dickins , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , Johannes Weiner , Andrew Morton , KAMEZAWA Hiroyuki , Andi Kleen Tim Chen wrote: > On Thu, 2012-02-23 at 17:51 +0400, Konstantin Khlebnikov wrote: >> v3 changes: >> * inactive-ratio reworked again, now it always calculated from from scratch >> * hierarchical pte reference bits filter in memory-cgroup reclaimer >> * fixed two bugs in locking, found by Hugh Dickins >> * locking functions slightly simplified >> * new patch for isolated pages accounting >> * new patch with lru interleaving >> >> This patchset is based on next-20120210 >> >> git: https://github.com/koct9i/linux/commits/lruvec-v3 >> >> --- > > I am seeing an improvement of about 7% in throughput in a workload where > I am doing parallel reading of files that are mmaped. The contention on > lru_lock used to be 13% in the cpu profile on the __pagevec_lru_add code > path. Now lock contention on this path drops to about 0.6%. I have 40 > hyper-threaded enabled cpu cores running 80 mmaped file reading > processes. > > So initial testing of this patch set looks encouraging. That's great! > > Tim > -- 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 internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org