linux-kernel - Re: [PATCH 2/2] nohz: make nohz

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Message-ID: <1428376220.3201.5.camel@gmail.com>
Date:	Tue, 07 Apr 2015 05:10:20 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	Chris Metcalf <cmetcalf@...hip.com>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] nohz: make nohz_full imply isolcpus

On Mon, 2015-04-06 at 15:28 -0400, Rik van Riel wrote:
> On 04/03/2015 11:43 PM, Mike Galbraith wrote:
> 
> > Speaking of microsecond savers, the (ick) deferment experiment 
> > below
> > cut 60 core jitter in half.  Shooting the clocksource watchdog 
> > fixes
> > alternating ~15us/~5us tick on my desktop box.
> > 
> > With workqueue twiddles and whatnot floating around, the thing is
> > starting to look viable.
> 
> Doesn't look too bad to me, though the changes below
> could probably use some comments when turned into a
> final patch :)

The watchdog yeah, the tick thing may want to become.. anything else.

        -Mike
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