Re: FreeBSD sound distortion problems with SB Live! fixed with PREEMPTION

On Sat, 2004-12-11 at 15:10 -0800, Doug White wrote:
> Okay, I'm testing this now ... so far no issues, unless I force things.
> 

If this can help somehow: Running tests now, 192kbit CBR MP3 with
freshly compiled mpg321-0.2.10_4 on one of the machines mentioned in my
other email before.

As listening, the distortions are really quite heavy, maybe I just live
with them for too long that I usually don't notice all of them. There is
always some sort of quick choppines, slowdown or a *click* every 5-30
seconds (even when there are still some times, when audio plays fine for
more than a minute, so the distortions are not constant).

The system is FreeBSD 6.0-CURRENT #0: Wed Dec  8 02:43:42 CET 2004

Machine is AMD Athlon(tm) XP 3200+ (Barton), KT600-based ABIT KV7.
Sound onboard 'VT8233/33A/8235/8237 AC97 Enhanced Audio Controller'
(I can possibly test with SB Live!, but it will take a few days).

SCHED_4BSD, no PREEMPTION, apic enabled, no WITNESS/INVARIANTS.
I will try to remove apic during next stage of testing.

Testing in gnome-terminal under Gnome 2.8.

load averages:  0.06,  0.12,  0.15    up 3+11:30:48 02:02:31
112 processes: 1 running, 109 sleeping, 2 zombie
CPU states:5.5% user, 0.0% nice, 2.7% system, 0.8% interrupt, 91.0% idle
Mem: 250M Active, 102M Inact, 107M Wired, 29M Cache, 60M Buf, 1028K Free
Swap: 4096M Total, 77M Used, 4018M Free, 1% Inuse

 PID USERNAME PRI NICE   SIZE    RES STATE    TIME   WCPU    CPU COMMAND
56200 user     -8    0  5356K  1196K pcmwr    0:12  0.10%  0.10% mpg321

Interrupt layout:

irq1: atkbd0                      501350          1
irq6: fdc0                             7          0
irq8: rtc                       38522885        127
irq9: acpi0                          112          0
irq13: npx0                            1          0
irq14: ata0                      1806282          6
irq15: ata1                          127          0
irq16: nvidia0                  95992596        318
irq18: rl0                            10          0
irq21: uhci0 uhci1*              5354052         17
irq22: pcm0                     74738345        248
irq23: vr0                      30960922        102
irq0: clk                      301050337       1000
Total                          548927026       1823

Does this show something, or should I move to the test with apic
disabled?

m.

-- 
Michal Varga <varga_at_stonehenge.sk>
Stonehenge