From: Mike Galbraith <efault@gmx.de>
To: Carsten Emde <Carsten.Emde@osadl.org>
Cc: RT <linux-rt-users@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>, Len Brown <lenb@kernel.org>
Subject: Re: Q6600 + low frequency periodic timer + CPU_IDLE = much jitter
Date: Thu, 29 Jul 2010 13:21:34 +0200 [thread overview]
Message-ID: <1280402494.9599.53.camel@marge.simson.net> (raw)
In-Reply-To: <4C515958.60301@osadl.org>
On Thu, 2010-07-29 at 12:35 +0200, Carsten Emde wrote:
> Mike,
>
> > It's looking like my Q6600 is kinda slow at switching gears, and I'd
> > just like to verify that it is the hardware, not something odd going on
> > in cpuidle territory.
> Yes, it's the CPU. It is a known restriction of this processor and has
> been verified on a number of different systems. It appears that the
> processor is halted while the PLL is stabilizing. However, there is no
> formal confirmation from Intel AFAIK.
Thanks for the confirmation.
-Mike
prev parent reply other threads:[~2010-07-29 11:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-29 9:05 Q6600 + low frequency periodic timer + CPU_IDLE = much jitter Mike Galbraith
2010-07-29 10:35 ` Carsten Emde
2010-07-29 11:21 ` Mike Galbraith [this message]
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