Hi, I'm not on this mailing list so please cc me any replies. Here is a
description of my system and the problem.
[dwhysong@sleepy dwhysong]$ uname -a
Linux sleepy 2.3.22 #3 SMP Sat Oct 16 00:17:16 PDT 1999 i686 unknown
Hardware is a dual Celeron 300A, 256 meg ECC RAM, Tyan Tiger 100
mainboard, IDE disks, NCR 810A SCSI, Turtle Beach Tropez+, Soundblaster
Live (not in use), Matrox G400 video.
Loaded kernel modules:
[root@sleepy to_venus_and_back]# lsmod
Module Size Used by
serial 33140 1 (autoclean)
opl3 11336 0 (autoclean)
wavefront 46736 0
cs4232 2632 0
uart401 6288 0 [cs4232]
ad1848 16336 0 [cs4232]
sound 62988 0 [opl3 wavefront cs4232 uart401 ad1848]
soundcore 3204 8 [wavefront sound]
sd_mod 17436 0 (autoclean) (unused)
ncr53c8xx 51604 0
scsi_mod 64664 2 (autoclean) [sd_mod ncr53c8xx]
3c59x 19208 1 (autoclean)
nls_iso8859-1 2020 2 (autoclean)
nls_cp437 3548 2 (autoclean)
vfat 9276 2 (autoclean)
fat 31744 2 (autoclean) [vfat]
unix 17084 37 (autoclean)
Problem:
Tropez+ audio is configured via isapnp and works correctly upon bootup.
The system is stressed by simultaneously running:
2 threads of rc5des
Monte-Carlo stellar dynamics/galaxy distribution program
Radio astronomy process (CLEAN deconvolution, CPU/memory intensive)
minicom
At the same time I'm using "play" to play a .wav file. During peak load,
the sound stopped playing nicely. Instead it plays a short (perhaps
several tens of milliseconds) burst at a very regular 2 second interval.
My /var/log/messages file contains the following:
Oct 21 01:54:46 sleepy kernel: Sound: DMA (output) timed out - IRQ/DRQ
config error?
Oct 21 02:10:25 sleepy kernel: Serial driver version 4.30 with SHARE_IRQ
SERIAL_PCI PCI_IOMEM enabled
Oct 21 02:10:25 sleepy kernel: ttyS00 at 0x03f8 (irq = 4) is a 16550A
Oct 21 02:22:36 sleepy kernel: Sound: DMA (output) timed out - IRQ/DRQ
config error?
Oct 21 02:23:18 sleepy last message repeated 19 times
[many more "last message repeated N times"]
Unloading and reinstalling the driver modules does not fix the problem.
Unloading the driver modules, running isapnp again, and reloading the
drivers does not fix the problem.
Except for the serial module, no new devices were accessed around the time
when the problem was triggered.
[root@sleepy to_venus_and_back]# cat /proc/interrupts
CPU0 CPU1
0: 9989364 12306414 IO-APIC-edge timer
1: 48361 61336 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
4: 168358 210445 IO-APIC-edge serial
5: 72302 17309 IO-APIC-edge wavefront midi
7: 485022 663480 IO-APIC-edge Crystal audio controller
8: 2 0 IO-APIC-edge rtc
12: 48661 89628 IO-APIC-edge PS/2 Mouse
13: 1 0 XT-PIC fpu
14: 75466 71738 IO-APIC-edge ide0
15: 43188 53230 IO-APIC-edge ide1
17: 61522 60516 IO-APIC-level ncr53c8xx
19: 1675 2042 IO-APIC-level eth0
NMI: 22295915 22295915
LOC: 22274567 22279624
ERR: 0
[root@sleepy to_venus_and_back]# cat /proc/dma
1: Crystal audio controller
3: Crystal audio controller
4: cascade
I don't think it's an IRQ or DMA configuration problem, since it works at
bootup.
Dave
David Whysong [EMAIL PROTECTED]
Astrophysics graduate student University of California, Santa Barbara
My public PGP keys are on my web page - http://www.physics.ucsb.edu/~dwhysong
DSS PGP Key 0x903F5BD6 : FE78 91FE 4508 106F 7C88 1706 B792 6995 903F 5BD6
D-H PGP key 0x5DAB0F91 : BC33 0F36 FCCD E72C 441F 663A 72ED 7FB7 5DAB 0F91
