From: Larry Finger <Larry.Finger@lwfinger.net>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Michael Buesch <mb@bu3sch.de>,
bcm43xx-dev@lists.berlios.de,
Linux ACPI <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: 64-bit DMA problems with BCM4312 using b43
Date: Fri, 13 Nov 2009 15:34:39 -0600 [thread overview]
Message-ID: <4AFDD0EF.7000809@lwfinger.net> (raw)
In-Reply-To: <20091113211306.GA6600@srcf.ucam.org>
On 11/13/2009 03:13 PM, Matthew Garrett wrote:
> On Fri, Nov 13, 2009 at 03:05:18PM -0600, Larry Finger wrote:
>
>> I'm in the process of creating a patch to set the latency to 200 usec. The
>> default is 2000. On my fast prosessors, it should not be anything nearly that
>> slow. If we determine this to be the problem, then we can try tuning.
>
> The latency is the amount of time it takes to get out of deep C states
> and into C0. That's a function of the processor design rather than the
> frequency.
Thanks for that info. I should have said my Turion 64 X2 is different.
Larry
next prev parent reply other threads:[~2009-11-13 21:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-13 17:21 64-bit DMA problems with BCM4312 using b43 Larry Finger
2009-11-13 20:11 ` Matthew Garrett
[not found] ` <20091113201112.GA5540-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-13 20:44 ` Michael Buesch
[not found] ` <200911132144.24110.mb-fseUSCV1ubazQB+pC5nmwQ@public.gmane.org>
2009-11-13 21:05 ` Larry Finger
2009-11-13 21:13 ` Matthew Garrett
2009-11-13 21:34 ` Larry Finger [this message]
2009-11-14 3:40 ` Larry Finger
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