From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266870AbUHXFuU (ORCPT ); Tue, 24 Aug 2004 01:50:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266507AbUHXFuU (ORCPT ); Tue, 24 Aug 2004 01:50:20 -0400 Received: from adsl-209-204-138-32.sonic.net ([209.204.138.32]:34487 "EHLO server.home") by vger.kernel.org with ESMTP id S266133AbUHXFuO (ORCPT ); Tue, 24 Aug 2004 01:50:14 -0400 Date: Mon, 23 Aug 2004 22:49:31 -0700 (PDT) From: Christoph Lameter X-X-Sender: christoph@server.home To: Christoph Lameter cc: William Lee Irwin III , "David S. Miller" , raybry@sgi.com, ak@muc.de, benh@kernel.crashing.org, manfred@colorfullife.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, vrajesh@umich.edu Subject: Re: page fault scalability patch v3: use cmpxchg, make rss atomic In-Reply-To: Message-ID: References: <20040815130919.44769735.davem@redhat.com> <20040815165827.0c0c8844.davem@redhat.com> <20040815185644.24ecb247.davem@redhat.com> <20040816143903.GY11200@holomorphy.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Score: -4.9 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 23 Aug 2004, Christoph Lameter wrote: > Issue remaining: > - Figure out why performance drops for single thread. Sorry, wrong baseline... There is no issue here except using a 2GB test against a 4GB one. Unpatched: Gb Rep Threads User System Wall flt/cpu/s fault/wsec 4 3 1 0.157s 11.197s 11.035s 69261.721 69239.940 4 3 2 0.145s 11.445s 6.079s 67849.528 115681.409 4 3 4 0.182s 13.894s 4.027s 55865.834 184108.856 4 3 8 0.196s 24.874s 4.025s 31369.039 184790.767 With page fault scalability patch: Gb Rep Threads User System Wall flt/cpu/s fault/wsec 4 3 1 0.176s 11.323s 11.050s 68385.368 68345.055 4 3 2 0.174s 10.716s 5.096s 72205.329 131848.322 4 3 4 0.170s 10.694s 3.040s 72380.552 231128.569 4 3 8 0.177s 14.717s 2.064s 52796.567 297380.041