snd_emu10k1 tremendous interrupt load?

Rink Springer rink at
Sat Feb 17 10:51:14 UTC 2007

Hi People,

On Sat, Feb 10, 2007 at 10:02:45PM +0300, Yuriy Tsibizov wrote:
> >Hi people,
> >
> >Over the last few days, my CURRENT box has started to slow down to a
> >crawl. top(1) reports most CPU load is spent on interrupts, and a quick
> >vmstat -i to support this completely:
> >
> >interrupt                          total       rate
> >irq1: atkbd0                        1631          0
> >irq15: ata1                        14197          2
> >irq16: pcm0                   1056243398     160109
> Rate for emu10k1 cards should be arount 48 interrupts/s. Do you record or 
> play sound?
Switching snd_emu10kx1 doesn't make difference. In fact, all of a
sudden, the onboard fxp(4) (which I don't use) shows exactly the same
behaviour (and I have seen this happen the nVidia driver as well). This
makes me believe the problems is elsewhere, and not in emu10k1/emu10kx
at all.

I will update my machine to the latest CURRENT and see how that goes.
Could the recently-added MSI changes perhaps contribute to this odd
behaviour? It looks to me either my machine is broken (even though
Windows XP works fine on it), or something changed in CURRENT.

To be continued...

Rink P.W. Springer                                -
"It is such a quiet thing, to fall. But yet a far more terrible thing,
 to admit it."                                    - Darth Traya
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