From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from psmtp.com (na3sys010amx126.postini.com [74.125.245.126])
	by kanga.kvack.org (Postfix) with SMTP id 131076B13F0
	for <linux-mm@kvack.org>; Mon,  6 Feb 2012 13:19:50 -0500 (EST)
Date: Mon, 6 Feb 2012 12:19:44 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
Subject: Re: [v7 0/8] Reduce cross CPU IPI interference
In-Reply-To: <CAOtvUMdCZpQuSvutKHpMxthktTm_VkA1R99yxpNhxpsYN9wTRQ@mail.gmail.com>
Message-ID: <alpine.DEB.2.00.1202061218420.2799@router.home>
References: <1327572121-13673-1-git-send-email-gilad@benyossef.com> <1327591185.2446.102.camel@twins> <CAOtvUMeAkPzcZtiPggacMQGa0EywTH5SzcXgWjMtssR6a5KFqA@mail.gmail.com> <1328117722.2446.262.camel@twins> <20120201184045.GG2382@linux.vnet.ibm.com>
 <alpine.DEB.2.00.1202011404500.2074@router.home> <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>
 <alpine.DEB.2.00.1202021124520.6338@router.home> <CAOtvUMdCZpQuSvutKHpMxthktTm_VkA1R99yxpNhxpsYN9wTRQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Avi Kivity <avi@redhat.com>, Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-kernel@vger.kernel.org, Chris Metcalf <cmetcalf@tilera.com>, Frederic Weisbecker <fweisbec@gmail.com>, linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>, Sasha Levin <levinsasha928@gmail.com>, Rik van Riel <riel@redhat.com>, Andi Kleen <andi@firstfloor.org>, Mel Gorman <mel@csn.ul.ie>, Andrew Morton <akpm@linux-foundation.org>, Alexander Viro <viro@zeniv.linux.org.uk>, Michal Nazarewicz <mina86@mina86.com>, Kosaki Motohiro <kosaki.motohiro@gmail.com>, Milton Miller <miltonm@bga.com>

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.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>