From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757332AbYEHERt (ORCPT ); Thu, 8 May 2008 00:17:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752000AbYEHERj (ORCPT ); Thu, 8 May 2008 00:17:39 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:48502 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751653AbYEHERh (ORCPT ); Thu, 8 May 2008 00:17:37 -0400 Date: Wed, 7 May 2008 21:17:14 -0700 (PDT) From: Linus Torvalds To: "Zhang, Yanmin" cc: Andi Kleen , Matthew Wilcox , Ingo Molnar , LKML , Alexander Viro , Andrew Morton Subject: Re: AIM7 40% regression with 2.6.26-rc1 In-Reply-To: <1210219729.3453.97.camel@ymzhang> Message-ID: References: <1210052904.3453.30.camel@ymzhang> <20080506114449.GC32591@elte.hu> <1210126286.3453.37.camel@ymzhang> <1210131712.3453.43.camel@ymzhang> <87lk2mbcqp.fsf@basil.nowhere.org> <20080507114643.GR19219@parisc-linux.org> <87hcdab8zp.fsf@basil.nowhere.org> <1210214696.3453.87.camel@ymzhang> <1210219729.3453.97.camel@ymzhang> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 8 May 2008, Zhang, Yanmin wrote: > > On Wed, 2008-05-07 at 20:29 -0700, Linus Torvalds wrote: > > > > That said, "idle 0%" is easy when you spin. Do you also have actual > > performance numbers? > > Yes. My conclusion is based on the actual number. cpu idle 0% is just > a behavior it should be. Thanks, that's all I wanted to verify. I'll leave this overnight, and see if somebody has come up with some smart and wonderful patch. And if not, I think I'll apply mine as "known to fix a regression", and we can perhaps then improve on things further from there. Linus