Re: [gentoo-amd64] Bad performance on doom3 with alsa and oss

[Etienne Imguimbert]

Dear all

Here is the alsa section of the FAQ about Linux version of doom3:
http://zerowing.idsoftware.com/linux/doom/#head-8c36163f1dfc3a253ef72c0f821b0b0dd2fc17b1

This FAQ says about amd64 system:
"on amd64 systems you may need to get the snd-ioctl32 module loaded in "

What does it mean? I don't understand the meaning of this sentence (excuse
me but english is not my mother tongue). What is the snd-ioctl32 module ?

Thanks in advance,
Best regards,

Etienne



2006/1/16, Etienne Imguimbert <eimguimbert@×××××.com>:
>
> Le Dimanche 15 Janvier 2006 05:48, Eric Augustus a écrit:
> > On Fri, Jan 13, 2006 at 09:34:32AM +0100, Etienne Imguimbert wrote:
> > >    Dear gentoo amd64 users
> > >
> > >    I've installed doom3 via the emerge command, and I have several
> > >    problems of performance. I tried several configurations:
> > >
> > >    - when I switch to alsa in doom3, I get very noisy sounds (I get
> > >    several messages of rejected packets by alsa in the shell)
> >
> > You could try changing to the alsa PCM setting, "seta s_alsa_pcm" to
> > "surround51" or anything else besides "default" in your DoomConfig.cfg.
> I
> > had issues with the default setting on my setup and switched. Now I get
> > pretty decent sound.
> >
> > >    - when I switch to oss, I get huge slowdowns in the game (I think
> > >    there is a problem with the OSS emulation by alsa)
> > >
> > >    - when playing timedemo demo1 in the doom3 prompt, I get a good
> number
> > >    of fps (about 60), but this benchmark is played without sound, so I
> > >    deduce that I have problem with sounds.
> >
> > The demo is not supposed to have sound.
> >
> >
> > --
> > Eric Augustus
> > shrike@×××××××××.com
> > -----------------
> > For the sake of argument I'll ignore all your fighting words.
> >              -- Larry Wall in <199710221710.KAA24242@××××.org>
>
> Dear Eric,
> I've modified the file DoomConfig.cfg as you indicate, and there is no
> sound
> at all when I switch to alsa. The message I get is:
>
> ------------- Warnings ---------------
> during DOOM 3 initialization...
> WARNING: idPort::SendPacket: bad address type NA_BAD - ignored
> WARNING: sound subsystem disabled
>
> 2 warnings
>
> When I specify seta s_alsa_pcm "default" in the config file, I get very
> noisy
> sounds, and the messages in the shell are:
> ....
> idAudioHardwareALSA::Write: 4096 frames overflowed and dropped
> snd_pcm_writei failed: Resource temporarily unavailable
> snd_pcm_writei short write: 940 out of 1024
> snd_pcm_writei short write: 1880 out of 2048
> snd_pcm_writei short write: 940 out of 1024
> idAudioHardwareALSA::Write: 4096 frames overflowed and dropped
> snd_pcm_writei short write: 1880 out of 2048
> snd_pcm_writei short write: 940 out of 1024
> snd_pcm_writei short write: 940 out of 1024
> snd_pcm_writei short write: 940 out of 1024
> idAudioHardwareALSA::Write: 4096 frames overflowed and dropped
> snd_pcm_writei failed: Resource temporarily unavailable
> snd_pcm_writei short write: 940 out of 1024
> ....
>
> I precise:
> I've got arts running using alsa output, but I specify it to suspend if
> inactive during 30 secondes. I tested sounds in doom3 with and without
> arts
> launched: it changes nothing.
>
> Also when running doom3, the cpu frequency is max (2.2 GHz), so I don't
> think
> that my problem would come from bad configured cpuscaling...
>
> I don't know what to do to have good perfs with good sounds. (Remember if
> I
> switch to oss backend, perfs are low and sounds are just acceptable).
>
> Best regards,
>
> Etienne Imguimbert
>
>
>
> --
> gentoo-amd64@g.o mailing list
>
>