From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264899AbTLKLxy (ORCPT ); Thu, 11 Dec 2003 06:53:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264906AbTLKLxy (ORCPT ); Thu, 11 Dec 2003 06:53:54 -0500 Received: from holomorphy.com ([199.26.172.102]:20197 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S264899AbTLKLxw (ORCPT ); Thu, 11 Dec 2003 06:53:52 -0500 Date: Thu, 11 Dec 2003 03:52:22 -0800 From: William Lee Irwin III To: Nick Piggin Cc: linux-kernel , Ingo Molnar , Rusty Russell , Anton Blanchard , "Martin J. Bligh" , "Nakajima, Jun" , Mark Wong Subject: Re: [CFT][RFC] HT scheduler Message-ID: <20031211115222.GC8039@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Nick Piggin , linux-kernel , Ingo Molnar , Rusty Russell , Anton Blanchard , "Martin J. Bligh" , "Nakajima, Jun" , Mark Wong References: <3FD3FD52.7020001@cyberone.com.au> <20031208155904.GF19412@krispykreme> <3FD50456.3050003@cyberone.com.au> <20031209001412.GG19412@krispykreme> <3FD7F1B9.5080100@cyberone.com.au> <3FD81BA4.8070602@cyberone.com.au> <3FD8317B.4060207@cyberone.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3FD8317B.4060207@cyberone.com.au> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 11, 2003 at 07:57:31PM +1100, Nick Piggin wrote: > OK, it is spinning on .text.lock.futex. The following results are > top 10 profiles from a 120 rooms run and a 150 rooms run. The 150 > room run managed only 24.8% the throughput of the 120 room run. > Might this be a JVM problem? > I'm using Sun Java HotSpot(TM) Server VM (build 1.4.2_01-b06, mixed mode) > ROOMS 120 150 > PROFILES > total 100.0% 100.0% > default_idle 81.0% 66.8% > .text.lock.rwsem 4.6% 1.3% > schedule 1.9% 1.4% > .text.lock.futex 1.5% 19.1% > __wake_up 1.1% 1.3% > futex_wait 0.7% 2.8% > futex_wake 0.7% 0.5% > .text.lock.dev 0.6% 0.2% > rwsem_down_read_failed 0.5% > unqueue_me 3.2% If this thing is heavily threaded, it could be mm->page_table_lock. -- wli