[LAU] rtirq - what does it improve, and how can I measure it?

[Kaj Ailomaa]

On 05/07/2012 02:06 PM, Kaj Ailomaa wrote:
> I understand that the rtirq script is designed to raise rtprio for audio
> devices, which is made possible on the vanilla kernel since 2.6.39(?),
> if passing the threadirqs option to the kernel at boot, and having built
> it with the CONFIG_FORCE_THREADIRQ.

I meant CONFIG_IRQ_FORCED_THREADING=y, of course..

>
>  From my experience, I have not had any performance boost using the
> rtirq script, but I have read about it helping those who are getting
> xruns due to irq sharing.
>
> So, I'm wondering. What picture do others have of the benefit of the
> rtirq script?
>
> ..and are there other ways to measure improvement for audio operation
> other than spotting xruns at different latency settings, and reading the
> rtprio for various devices using the 'ps' command?
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