linuxaudio.org

On 05/07/12 14:06, Kaj Ailomaa wrote:

quoted text
> 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.

>

>  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.

>

Hello Kaj,
rtirq allows you to elevate the prios of softirq's which could enhance

the performance of those prioritized softirq's. So it doesn't really

boost the overall performance of a system.
> So, I'm wondering. What picture do others have of the benefit of the

quoted text
> rtirq script?

>

Without rtirq I simply can't use my FireWire card on my notebook for

example. The FireWire controller shares its IRQ with a plethora of other

devices (GPU, WiFi, cardreader) and if I don't use rtirq jackd simply

won't start.
> ..and are there other ways to measure improvement for audio operation

quoted text
> other than spotting xruns at different latency settings, and reading the

> rtprio for various devices using the 'ps' command?

Yes, htop and latencytop for example.
Best,
Jeremy
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