linux-kernel - Re: [v7 0/8] Reduce cross CPU IPI interference

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.00.1202061218420.2799@router.home>
Date:	Mon, 6 Feb 2012 12:19:44 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Gilad Ben-Yossef <gilad@...yossef.com>
cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Avi Kivity <avi@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, Chris Metcalf <cmetcalf@...era.com>,
	Frederic Weisbecker <fweisbec@...il.com>, linux-mm@...ck.org,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andi Kleen <andi@...stfloor.org>, Mel Gorman <mel@....ul.ie>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Michal Nazarewicz <mina86@...a86.com>,
	Kosaki Motohiro <kosaki.motohiro@...il.com>,
	Milton Miller <miltonm@....com>
Subject: Re: [v7 0/8] Reduce cross CPU IPI interference

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 from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/