Re: [LAD] Kontakt Spikes

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To: Michael Ost <most@...>
Cc: <linux-audio-dev@...>
Date: Monday, October 10, 2011 - 10:05 pm

Michael Ost wrote:

This shouldn't happen.

> I was curious about "migration" since

When migrating threads to another CPU (core), there is no big delay
because real-time threads have well-defined scheduling behaviour and
either interrupt the running thread immediately or go into the runnable
queue like other threads that already are on that CPU.

The reason that the cost is set so high is that the new thread will run
slower because it has to pull over its data from the other cache.

I guess I can rule out SMIs because those should happen even when there
is one thread per core.

How big are the latencies you're seeing? They are not from being
interrupted by another RR thread at the same priority (see "man
sched_rr_get_interval")?

Regards,
Clemens
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Messages in current thread:
[LAD] Kontakt Spikes, Michael Ost, (Sat Oct 8, 1:26 am)
Re: [LAD] Kontakt Spikes, Clemens Ladisch, (Sat Oct 8, 11:03 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Mon Oct 10, 5:56 pm)
Re: [LAD] Kontakt Spikes, Clemens Ladisch, (Mon Oct 10, 10:05 pm)
Re: [LAD] Kontakt Spikes, Michael Ost, (Tue Oct 11, 12:42 am)
Re: [LAD] Kontakt Spikes, Clemens Ladisch, (Tue Oct 11, 8:24 am)
Re: [LAD] Kontakt Spikes, Clemens Ladisch, (Tue Oct 11, 8:52 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Tue Oct 11, 4:33 pm)
Re: [LAD] Kontakt Spikes, Paul Davis, (Tue Oct 11, 10:10 pm)
Re: [LAD] Kontakt Spikes, Michael Ost, (Tue Oct 25, 12:28 am)
Re: [LAD] Kontakt Spikes, Paul Davis, (Tue Oct 25, 12:36 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Tue Oct 11, 10:25 pm)
Re: [LAD] Kontakt Spikes, Robin Gareus, (Mon Oct 10, 7:05 pm)
Re: [LAD] Kontakt Spikes, Robin Gareus, (Mon Oct 10, 7:09 pm)
Re: [LAD] Kontakt Spikes, Nick Copeland, (Mon Oct 10, 8:37 pm)
Re: [LAD] Kontakt Spikes, Michael Ost, (Mon Oct 10, 8:48 pm)
Re: [LAD] Kontakt Spikes, Fons Adriaensen, (Mon Oct 10, 7:31 pm)
Re: [LAD] Kontakt Spikes, Robin Gareus, (Mon Oct 10, 7:37 pm)
Re: [LAD] Kontakt Spikes, Robin Gareus, (Sat Oct 8, 3:08 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Wed Oct 12, 11:28 pm)
Re: [LAD] Kontakt Spikes, Robin Gareus, (Thu Oct 13, 2:20 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Mon Oct 10, 6:03 pm)
Re: [LAD] Kontakt Spikes, Devin Anderson, (Sat Oct 8, 2:46 am)
Re: [LAD] Kontakt Spikes, Michael Ost, (Mon Oct 10, 7:38 pm)
Re: [LAD] Kontakt Spikes, Devin Anderson, (Mon Oct 10, 8:14 pm)