Ariff Abdullah wrote:
On Thu, 16 Mar 2006 16:50:17 -0600
Mark Kane <[EMAIL PROTECTED]> wrote:
My sound is compiled into the kernel so I'm not sure how to reload
the driver without rebooting. I did try the above suggestions
though. When trying 32768 and 65536 the crackling in the audio got
worse/louder than before when copying data.
Maybe you're experiencing resource contention caused by irq sharing.
Take a look at the output of vmstat -i. Try to move the soundcard
elsewhere (other pci slot). Another thing to consider is PCI Latency
Timer settings. If your BIOS has the option to toggle the value, try
to increase it. If not, use this:
http://people.freebsd.org/~ariff/utils/pcilattimer
Thanks again for the suggestions. So far here is what I have:
[EMAIL PROTECTED]:~]% vmstat -i
interrupt total rate
irq1: atkbd0 200599 0
irq3: sio1 1 0
irq4: sio0 1 0
irq6: fdc0 3 0
irq12: psm0 5873314 26
irq14: ata0 1285014 5
irq15: ata1 159907 0
irq16: atapci3 1100937 5
irq17: pcm0 6193491 28
irq18: fwohci0+ 2 0
irq19: skc0+ 19711298 90
cpu0: timer 435955564 2000
Total 470480131 2158
Nothing is sharing the same irq from what I can see. I have not been
able to shut this machine down yet so I have not tried moving the sound
card, but if nothing else is on the same irq will that even make a
difference?
I tried your utility to change the PCI timings as I have not been able
to check in BIOS yet (I don't believe it has those settings anyway). I
performed various tests while increasing the value for the sound card to
several different values. I have never had to do this before so I just
guessed at a bunch of numbers, and then returned it back to 32 which is
where it was originally. Some numbers I tried were 64, 96, 128, 192, 256
(which auto set it to 200), etc. None of the changes seemed to change
the crackling of the sound at all. I stopped and restarted the song each
time after changing the settings and before accessing the hard drive to
test, but still no change. I also tried increasing the timing on atapci3
which is the controller where the test HD for this round was.
Here is the listing of the unmodified times with -l:
PCI Latency Timer [EMAIL PROTECTED]:0:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:1:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:1:1: : 0
PCI Latency Timer [EMAIL PROTECTED]:2:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:2:1: : 0
PCI Latency Timer [EMAIL PROTECTED]:2:2: : 0
PCI Latency Timer [EMAIL PROTECTED]:8:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:10:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:11:0: : 16
PCI Latency Timer [EMAIL PROTECTED]:14:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:24:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:24:1: : 0
PCI Latency Timer [EMAIL PROTECTED]:24:2: : 0
PCI Latency Timer [EMAIL PROTECTED]:24:3: : 0
PCI Latency Timer [EMAIL PROTECTED]:0:0: : 32
PCI Latency Timer [EMAIL PROTECTED]:7:0: : 32
PCI Latency Timer [EMAIL PROTECTED]:9:0: : 32
PCI Latency Timer [EMAIL PROTECTED]:9:1: : 32
PCI Latency Timer [EMAIL PROTECTED]:9:2: : 32
PCI Latency Timer [EMAIL PROTECTED]:11:0: : 64
PCI Latency Timer [EMAIL PROTECTED]:12:0: : 0
PCI Latency Timer [EMAIL PROTECTED]:14:0: : 32
-Mark
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