[linux-audio-user] Kernel 2.6.15.4-rt tests (+sound samples)

Hi, cheers,

Listen to the ogg files from here:
http://www.musix.org.ar/ogg/
1)
http://www.musix.org.ar/ogg/kernel-2.6.15.4-rt_tests_zyn+hydrogen+timemachine-musix_gnu+linux.ogg
2)
http://www.musix.org.ar/ogg/kernel-2.6.15.4-rt_tests_zyn+hydrogen+timemachine+jamin-musix_gnu+linux.ogg

* rtirq status

  PID CLS RTPRIO NI PRI %CPU STAT COMMAND
  660 FF 90 - 130 0.0 S< IRQ 8 [........./ 0] rtc
 1099 FF 80 - 120 0.0 S< IRQ 10 [........./ 0]
uhci_hcd
 1229 FF 79 - 119 0.0 S< IRQ 5 [........./ 0]
uhci_hcd
 2525 FF 70 - 110 0.0 S< IRQ 11 [........./ 0]
ehci_hcd
  674 FF 69 - 109 0.0 S< IRQ 6 [........./ 0]
uhci_hcd
  757 FF 60 - 100 0.0 S< IRQ 1 [........./ 0] i
  671 FF 59 - 99 0.0 S< IRQ 12 [........./ 0] i
  692 FF 46 - 86 0.3 S< IRQ 14 [........./ 0] ide
  695 FF 45 - 85 0.0 S< IRQ 15 [........./ 0] ide
 1471 FF 41 - 81 0.0 S< IRQ 4

That works OK
Apps test:

1)
/usr/bin/jackd -R -P89 -t1000 -m -dalsa -dhw:0 -r48000 -p64 -n2 -P -s -S
(2.67 ms latency)

I can play Hydrogen with a heavy (weighted) drum kit, and i had only 1
(2) xruns into JACK (qjackctl)

2)
usr/bin/jackd -R -P89 -t1000 -m -dalsa -dhw:0 -r48000 -p128 -n2 -P -s -S
(5.33 ms latency)

I can play Hydrogen with a heavy (weighted) drum kit, and i had no xruns
into JACK(qjackctl)
I loaded zynaddsubfx and play with some instruments when listening to
Hydrogen drums, and had no xruns (that's fine!), but, when i opened
timemachine to record my demo song, it produced more xruns (whit hard
disk read/write), so I will use a more conservative setup for jack

3)
/usr/bin/jackd -R -P89 -t1000 -m -dalsa -dhw:0 -r44100 -p256 -n2 -P -s
-S
(11.6ms latency)

I can play Hydrogen with a heavy (weighted) drum kit, and i had no xruns
into JACK(qjackctl)
I loaded zynaddsubfx and play with some instruments when listening to
Hydrogen drums, and had no xruns (that's fine!), then i opened
timemachine to record my demo song (there were some sound artifacts,
some clicks when connecting jack virtual cables).

Ok, press REC into timemachine to record a live jamin and it works just
fine: no xruns.

3.1)
Then i opened Jamin to master in a live mode.... and it produces 1 (2)
xruns when loading itself.

When I played my keyboard with zynaddsubfx it produced 3(4) xruns. Then
when I recorded with timemachine connected to Jamin, it produced 5 (6)
xruns, but it sounded ok.

* I think that all of these xruns have something to be with HD settings
and with my 120Mb RAM memory Duron1800Mhz, SB Live!

These test are ok for me... but we must test this kernel into a better
PC.

Download this kernel from:
http://tapsa.terae.net/linux/knoppix/suomiknoppix/linux-2.6.15.4-rt/

-- 
Marcos Guglielmetti  
Coordinador del desarrollo de Musix GNU+Linux 
(www.musix.org.ar) 
Mirrors: (www.musix.distrux.net) (www.pc-musica.com.ar/musix) 
(www.k-maleon.com/musix)
		
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