linux-kernel - Re: Scalability requirements for sysv ipc

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Message-Id: <1206469863.4622.6.camel@marge.simson.net>
Date:	Tue, 25 Mar 2008 19:31:03 +0100
From:	Mike Galbraith <efault@....de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Manfred Spraul <manfred@...orfullife.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	paulmck@...ux.vnet.ibm.com, Nadia Derbey <Nadia.Derbey@...l.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: Scalability requirements for sysv ipc


On Tue, 2008-03-25 at 17:13 +0100, Peter Zijlstra wrote:
> On Tue, 2008-03-25 at 16:50 +0100, Mike Galbraith wrote:

> > ...and I verified it via :-/ echo 7 > sched_features in latest.  That
> > only bought me roughly half though, so there's a part three in there
> > somewhere.
> 
> Ouch, I guess hrtimers are just way expensive on some hardware... 

That would be about on par with my luck.  I'll try to muster up the
gumption to go looking for part three, though my motivation for
searching long ago proved to be a dead end wrt sysv ipc.

	-Mike

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