From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754989Ab2BFSTv (ORCPT ); Mon, 6 Feb 2012 13:19:51 -0500 Received: from smtp107.prem.mail.ac4.yahoo.com ([76.13.13.46]:48551 "HELO smtp107.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750797Ab2BFSTu (ORCPT ); Mon, 6 Feb 2012 13:19:50 -0500 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 5pQxkjYVM1lIXClNyDpp9sIyeRwrVqDjFD5dlpTySS.qNdO bP6ipK4bySqK2d7DlBAIo83uydQf.Z1nBajXcBWHMCrruB0BD.6zG2r2BsAp FQKvcj4UNq45SVplfDVg2RpYjJTC7Qn0SRx08HZeIMv2LFP3RFly7zo0TTuI KApHTVQy.MtWCc.qCOBFRfcl6u5br_4QbhxtCN6A5_wOak7AjKxXh46P3_11 Wu6uSERLOPLSAO6ML32LKWHptXoiRnzZki1IW3swAQ_WqVWEAYvAcvjeWVXK xMzSse7Pl_4FuqOpwNrBjSxf5OXbDLVdqrnHb0cMh7bdQmK20Nid9se_6ZIu s3hF2N7DUOlBtBsdjHt75e9TUKJmGpzXP9qLEjLhRhLuaGB.7ka2bab7ziec XIA.mv3pUD4.4ZoWPkQpPys9eI8dpDIDvSsoz3akdygce.63Trcbm9rf9LBY 9YmpnTabpkD5XucksCQvzfJUa8aF4gJ0- X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- Date: Mon, 6 Feb 2012 12:19:44 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@router.home To: Gilad Ben-Yossef cc: "Paul E. McKenney" , Avi Kivity , Peter Zijlstra , linux-kernel@vger.kernel.org, Chris Metcalf , Frederic Weisbecker , linux-mm@kvack.org, Pekka Enberg , Matt Mackall , Sasha Levin , Rik van Riel , Andi Kleen , Mel Gorman , Andrew Morton , Alexander Viro , Michal Nazarewicz , Kosaki Motohiro , Milton Miller Subject: Re: [v7 0/8] Reduce cross CPU IPI interference In-Reply-To: Message-ID: References: <1327572121-13673-1-git-send-email-gilad@benyossef.com> <1327591185.2446.102.camel@twins> <1328117722.2446.262.camel@twins> <20120201184045.GG2382@linux.vnet.ibm.com> <20120201201336.GI2382@linux.vnet.ibm.com> <4F2A58A1.90800@redhat.com> <20120202153437.GD2518@linux.vnet.ibm.com> <4F2AB66C.2030309@redhat.com> <20120202170134.GM2518@linux.vnet.ibm.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) 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 Sun, 5 Feb 2012, Gilad Ben-Yossef wrote > > Frederic has the latest version in a git tree here: > > git://github.com/fweisbec/linux-dynticks.git > nohz/cpuset-v2-pre-20120117 > > It's on top latest rcu/core. Hmmm.. A pull vs upstream leads to lots of conflicts. > But the good news is that with these hacks applied I managed to run a 100% > CPU task with zero interrupts (ticks or otherwise) on an isolated cpu. Cool. > Disregarding TLB overhead, you get bare metal performance with Linux user > space manageability and debug capabilities. Pretty magical really: It's like > eating your cake and having it too :-) We definitely need that.