From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752793Ab2BYFeK (ORCPT ); Sat, 25 Feb 2012 00:34:10 -0500 Received: from mail-bk0-f46.google.com ([209.85.214.46]:62397 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751206Ab2BYFeI (ORCPT ); Sat, 25 Feb 2012 00:34:08 -0500 Authentication-Results: mr.google.com; spf=pass (google.com: domain of koct9i@gmail.com designates 10.205.117.4 as permitted sender) smtp.mail=koct9i@gmail.com; dkim=pass header.i=koct9i@gmail.com Message-ID: <4F4872CC.1000702@openvz.org> Date: Sat, 25 Feb 2012 09:34:04 +0400 From: Konstantin Khlebnikov User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.19) Gecko/20120201 Iceape/2.0.14 MIME-Version: 1.0 To: Tim Chen CC: Hugh Dickins , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , Johannes Weiner , Andrew Morton , KAMEZAWA Hiroyuki , Andi Kleen 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 >