skype on current/5.x and maestro-2E sound

[cpghost]

Pyun YongHyeon wrote:

>On Sun, May 15, 2005 at 02:41:24AM -0700, Julian Elischer wrote:
> > cpghost at cordula.ws wrote:
> > >On Sat, May 14, 2005 at 06:51:48PM -0700, Julian Elischer wrote:
> > >
> > >>Has anyone run skype successfully on these versions (5 or 6) of freeBSD?
> > >>I can run it successfully on 4.x but on my 5.x machine the audio is 
> > >>completely
> > >>broken up. like someone is chopping the audio stream.
> > >
> > >
> > >I'm running Skype on 5.4 (via82c686). On an AMD Duron 1200 MHz, the
> > >sound quality is all right; on an EPIA 5000 Eden 500 MHz (also via82c686),
> > >the sound is totally chopped and it is impossible to follow.
> > 
> > hmm so maybe its the fact that my machine is too slow.. it's also 500MHz
> > my 1GHz 4.11 machine seems to run it fine.
> > 
>
>I don't think 500MHz is too slow. Check if kernel converters
>are active when you play audio samples.(cat /dev/sndstat after
>setting hw.snd.verbose=2).
>  
>
This is what I get while skype plays the chopped sound of the echo service:

epia2# cat /dev/sndstat
FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <VIA VT82C686A> at io 0xdc00 irq 10 kld snd_via82c686 (1p/1r/0v 
channels duplex default)
        [pcm0:play:0]: spd 48000, fmt 0x00000010, flags 0x00003030, 
0x00000000, pid 78793
        interrupts 18062, underruns 4824, ready 3580
        {userland} -> feeder_root(0x00000010) -> {hardware}
        [pcm0:record:0]: spd 48000, fmt 0x00000010, flags 0x00003030, 
0x00000000, pid 78793
        interrupts 16968, overruns 4808, hfree 512, sfree 3584
        {hardware} -> feeder_root(0x00000010) -> {userland}

No idea how to interpret this.

>Since the driver also needs Giant lock it may suffer from interrupt
>latencies with other devices. In addition if it share IRQ with
>other devices(e.g. USB) the issue would be noticable.
>  
>
None that I know of:

epia2# vmstat -i
interrupt                          total       rate
irq0: clk                       30624081         99
irq1: atkbd0                      416592          1
irq8: rtc                       39199914        128
irq10: pcm0                      1210380          3
irq11: vr0                        531082          1
irq12: psm0                      1354640          4
irq13: npx0                            1          0
irq14: ata0                      3681643         12
Total                           77018333        251

irc10 is not shared by any other likely interrupt source, or so it seems.

Regards,
-cpghost.

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