From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: latencytest for PPC?
Date: Tue, 19 Oct 2004 16:57:23 +0200
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To: Martin Habets <errandir_news@mph.eclipse.co.uk>
Cc: alsa-devel@lists.sourceforge.net
List-Id: alsa-devel@alsa-project.org

At Mon, 18 Oct 2004 23:06:25 +0100,
Martin Habets wrote:
> 
> Takashi,
> 
> I'm looking into adding RTC_PIE support to the genrtc driver,
> to get latencytest working.
> 
> I noticed you added rtc_register and rtc_control to rtc.c for this.
> But why didn't you add another ioctl in stead?

Sorry I don't understand your question.  rtc_register() and
rtc_control() is a kind of replacement of open/ioctl for the kernel
modules.  It doesn't add any new functionalities.

I guess genrtc won't work properly for latency tests.  RTC was used as
a high frequenct interrupt source, but genrtc doesn't provide the
interrupt fine enough.

If you need to use the soundcard's interrupt, keep the Benno's
original version (0.42).  In this case, you won't get stack traces,
though.


ciao,

Takashi


> Just wondering. Thanks,
>      Martin
> 
> On Mon, Oct 18, 2004 at 01:37:25PM +0100, MPH Kernel wrote:
> > Hi,
> > 
> > Anyone have a latency testing tool for PPC?
> > The latest working version I have is latencytest 0.42, but it
> > never detects any xruns (where alsa does). So I'm suspicious
> > of it's output.
> > 
> > latencytest 0.5.5 won't work for PPC. It depends on RTC stuff
> > not present in the gen_rtc module.
> > 
> > Thanks,
> > 	Martin
> 


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