Re: [LAU] OpenMoko FreeRunner and Real Time Kernel

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To: Anders Dahnielson <anders@...>
Cc: <linux-audio-user@...>
Date: Monday, July 14, 2008 - 7:25 pm

On Mon, Jul 14, 2008 at 02:46:57PM +0200, Anders Dahnielson wrote:

Really? I've been running a home-made Ingo patched RT kernel on my laptop for over a year now, and I get this:

[ken@asus ~]$ cat /proc/version
Linux version 2.6.21-rt1-1 (root@asus) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP PREEMPT Thu May 3 00:41:41 PDT 2007

No "RT" there, but I definitely know it is an RT kernel, because I patched it myself.

But, this whole thing is merely a curiosity anyway, since the FreeRunner doesn't have enough CPU to do much audio stuff. In fact PulseAudio is so slow on this phone that the audio hiccups when just playing an OGG file using ogg123, if the terminal application is open and updating with ogg123's stderr output. I'm told this is to do with the ARM's lack of support for atomic operations, which PulseAudio requires, and the use of interrupt masking and spinlocks as a hack around that.

-ken
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Messages in current thread:
[LAU] OpenMoko FreeRunner and Real Time Kernel, Ken Restivo, (Mon Jul 14, 9:28 am)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, MarcOChapeau, (Tue Jul 15, 6:31 am)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Brad Fuller, (Mon Jul 14, 11:06 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Ken Restivo, (Tue Jul 15, 11:42 am)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Anders Dahnielson, (Mon Jul 14, 12:47 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Ken Restivo, (Mon Jul 14, 7:25 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Florian Schmidt, (Mon Jul 14, 10:09 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Rui Nuno Capela, (Mon Jul 14, 10:48 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Ken Restivo, (Tue Jul 15, 7:00 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Rui Nuno Capela, (Wed Jul 16, 7:15 am)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Thomas Vecchione, (Mon Jul 14, 7:52 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Ray Rashif, (Mon Jul 14, 1:50 pm)
Re: [LAU] OpenMoko FreeRunner and Real Time Kernel, Jeremy Henty, (Mon Jul 14, 9:42 am)