On Monday 01 September 2008 20:31:15 Wannabe Tsotsi wrote:
> With OSS 4.0 and vmix simply open()'ing /dev/dsp for one second generates
> 3000 hdaudio0 interrupts (/proc/interrupts), while with OSS 4.1 with no
> vmix this drops to 400 oss_hdaudio0 interrupts.
Per the ossinfo output, vmix is still enabled on the 4.1 snapshot. It's just
integrated into osscore and not a separate driver anymore. (You can see the
number of engines is larger than the number of devices. 12/8 difference is
because vmix creates only 4 engines by default rather than 8 - if new ones are
needed they are created dynamically).
> The following config parameters seem to have no effect.
>
> /usr/lib/oss/conf/osscore.conf
>
> max_intrate=100
> src_quality=1
>
> Please could someone explain this high interrupt rate and how to reduce it,
> preferably with OSS 4.0, it's interfering with CPU power saving.
Hmm... Is the IRQ shared with some other device? 'lspci' can show this.
Second, what happens if vmix is disabled?
Yours,
Yair K.
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