My apologies this does not directly relate to development of OSS.
Ubuntu 6.10 - Linux/i686 2.6.25 - OSS 4.0 (b1015/200807100725) (0x00040003) GPL
and
Ubuntu 8.04 - Linux/i686 2.6.24-16-generic - OSS 4.1 (mercurial as of today)
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.
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.
thanks.
##### OSS 4.0
Version info: OSS 4.0 (b1015/200807100725) (0x00040003) GPL
Platform: Linux/i686 2.6.25 #1 SMP PREEMPT Thu Jul 10 08:04:16 BST 2008
((none))
Number of audio devices: 4
Number of audio engines: 12
Number of mixer devices: 1
Device objects
0: osscore0 OSS core services
1: vmix0 OSS transparent virtual mixer
2: hdaudio0 Intel HD Audio interrupts=188186 (188187)
HD Audio controller Intel HD Audio
Vendor ID 0x8086284b
Subvendor ID 0x80862654
Codec 0: ALC268 (0x10ec0268/0x10ec0268)
Codec 1: Unknown (0x10573055)
Mixer devices
0: High Definition Audio ALC268 (Mixer 0 of device object 2)
Audio devices
HD Audio speaker /dev/oss/hdaudio0/pcm0 (device index 0)
HD Audio headphone /dev/oss/hdaudio0/pcm1 (device index 1)
High Definition Audio rec1 /dev/oss/hdaudio0/pcmin0 (device index 2)
High Definition Audio rec2 /dev/oss/hdaudio0/pcmin1 (device index 3)
##### OSS 4.1
Version info: OSS 4.1 (b rc1/200809011546) (0x00040090)
Hg revision: changeset: 429:f399673b31ec, tag: tip, date: Mon Sep 01 17:10:10
2008 +0300, summary: Added BeOS/Haiku related files to OSS
Platform: Linux/i686 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008
Number of audio devices: 4
Number of audio engines: 8
Number of mixer devices: 1
Device objects
0: osscore0 OSS core services
1: oss_hdaudio0 Intel HD Audio interrupts=842 (129567)
HD Audio controller Intel HD Audio
Vendor ID 0x8086284b
Subvendor ID 0x80862654
Codec 0: ALC268 (0x10ec0268/0x10ec0268)
Codec 1: Unknown (0x10573055)
2: oss_usb0 USB audio core services
Mixer devices
0: High Definition Audio ALC268 (Mixer 0 of device object 1)
Audio devices
HD Audio play speaker /dev/oss/oss_hdaudio0/pcm0 (device index 0)
HD Audio play headphone /dev/oss/oss_hdaudio0/pcm1 (device index 1)
HD Audio rec select /dev/oss/oss_hdaudio0/pcmin0 (device index 2)
HD Audio rec select /dev/oss/oss_hdaudio0/pcmin1 (device index 3)
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