linux-kernel - Re: [PATCH] clockevents: Per cpu tick skew boot option

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Message-ID: <1336447221.7364.2.camel@marge.simpson.net>
Date:	Tue, 08 May 2012 05:20:21 +0200
From:	Mike Galbraith <mgalbraith@...e.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clockevents: Per cpu tick skew boot option

On Mon, 2012-05-07 at 21:17 +0200, Thomas Gleixner wrote: 
> On Sun, 6 May 2012, Mike Galbraith wrote:
> >  
> > +	skew_tick=	[KNL] Offset the periodic timer tick per cpu to mitigate
> > +			xtime_lock contention on larger systems.  Note: increases
> > +			power consumption, and should only be enabled if running
> > +			jitter sensitive (HPC/RT) workloads.
> > +
> 
> The "=" is wrong as skew_tick should not take parameters. It's
> disabled by default. So "skew_tick" simply enables it, right ?

Unless as I have RT set up, it's turned on by default, so '=' lets the
user turn it back off.

-Mike

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