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* Strange xmms deaths under high disk load
@ 2004-01-26 23:05 Måns Rullgård
  2004-01-26 23:27 ` Nick Piggin
  0 siblings, 1 reply; 4+ messages in thread
From: Måns Rullgård @ 2004-01-26 23:05 UTC (permalink / raw)
  To: linux-kernel


I have encountered a very strange (to me, at least) error.  I can
reliably cause xmms to crash by simply doing some intensive disk IO.
Copying a few hundred megabytes usually does it.  After about 20
seconds of heavy disk IO, xmms will die with this message:

** WARNING **: snd_pcm_wait: Input/output error
Xlib: unexpected async reply (sequence 0x2ef5c)!

The hex number varies.

The machine is an Alpha SX164 running Linux 2.6.2-rc2 patched up to
ALSA 1.0.1.  The problem has been around for quite a while, probably
also with kernel 2.4.21, though I can't confirm that at the moment.
The sound card is a cmi8738.

If I play music with TCVP instead, it keeps playing, but sound is
choppy at intervals.  Below is vmstat output during a copying.

procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 0  0      0  86128   3424 165920    0    0    66    66   24     4 23 23 54  0
 0  0      0  86128   3424 165920    0    0     0     0 1131  1352 17 14 69  0
 0  0      0  86128   3424 165920    0    0     0     0 1128  1360 13  4 84  0
 0  0      0  86128   3424 165920    0    0     0     0 1129  1351 13  4 84  0
 0  0      0  86128   3424 165920    0    0     0   153 1142  1361 14  3 83  0
 0  0      0  86128   3424 165920    0    0     0     0 1127  1353 14  4 83  0
 0  0      0  86128   3424 165920    0    0     0     0 1128  1348 12  3 84  0
 0  0      0  86128   3424 165920    0    0     0     0 1130  1344 17 15 69  0
 0  0      0  86000   3424 166048    0    0   128     0 1132  1356 13  3 84  0
 1  1      0  71648   3472 179992    0    0  7064    81 1255  1540 16 26 44 14
 2  0      0  34912   3480 216296    0    0 18081    88 1409  1792 20 61  1 18
 1  0      0   2016   3464 248720    0    0 19420     0 1423  1795 20 65  0 15
14  1      0   2400   3392 246544    0    0 11632 24929 1596  1489 16 60  1 23
11  2      0   2400   3392 246368    0    0   768 26112  969   626 25 71  0  3
 3  0      0   1952   3392 248552    0    0 10112  6310 1250  1396 29 51  0 20
 1  0      0   1568   3376 248760    0    0 18328     4 1409  1794 20 63  0 17
 1  0      0   2336   1696 249464    0    0 19576     0 1417  1858 20 68  0 11
 7  1      0   2400   1704 248160    0    0  8904 22984 1230   955 16 70  1 13
11  0      0   3040   1704 248160    0    0     0 33704  696    58 10 90  0  0
 1  1      0   2016   1704 249840    0    0 13980    88 1345  1710 29 60  0 10
 0  1      0   2016   1696 250056    0    0 17920     0 1479  1903 22 65  0 13
 1  0      0   2016   1712 250616    0    0 17968     0 1605  2085 27 66  0  7
16  0      0   2016   1736 249352    0    0  3224 53457 1284   379 11 86  0  4
 4  0      0   2208   1736 250448    0    0  9736    88 1558  1793 41 45  2 12
 1  1      0   2272   1728 250368    0    0 10200   105 1406  1691 46 42  0 12
 4  1      0   2272   1728 250544    0    0 11024     0 1362  1790 53 40  0  8
 2  0      0   2336   1720 250480    0    0 16760    33 1488  1916 26 62  0 12
19  0      0   2976   1720 248904    0    0  5644 53328 1537   682 12 81  0  6
 2  0      0   1760   1744 251080    0    0 12216    73 1365  1700 31 57  0 12
 1  0      0   1568   1736 251400    0    0 18520    72 1410  1809 21 66  0 13
 0  1      0   1568   1736 251368    0    0 17316    20 1405  1759 20 61  0 19
13  0      0   1888   1736 250632    0    0  5352 32205 1090   625 11 74  0 15
 1  1      0   2528   1736 250608    0    0  1756 21332  965   590 35 56  0  8
 4  0      0   1760   1696 251352    0    0 20040     0 1428  1825 21 69  0 10
 1  1      0   1504   1696 251824    0    0 15164    16 1366  1742 24 65  0 11
 6  1      0   2400   1696 249424    0    0 16460 27005 2106  1992 19 68  0 13

Whenever there was a high value for "bo" the sound was really choppy.

I don't mind an occasional glitch in the sound too much, but the fact
that xmms died makes me a little nervous.  What's worse, yesterday it
even corrupted the playlist file on disk rather badly.

The filesystems are XFS on device-mapper on raid1 over raid0 on four
disks connected to a hpt374 controller.

Should I just call it an xmms bug, or should I start digging for
hardware problems or kernel bugs?

-- 
Måns Rullgård
mru@kth.se

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: Strange xmms deaths under high disk load
@ 2004-01-27 10:36 Piotr Kowalczyk
  0 siblings, 0 replies; 4+ messages in thread
From: Piotr Kowalczyk @ 2004-01-27 10:36 UTC (permalink / raw)
  To: linux-kernel

Hello World\n

> I have encountered a very strange (to me, at least) error.  I can
> reliably cause xmms to crash by simply doing some intensive disk IO.
> Copying a few hundred megabytes usually does it.  After about 20
> seconds of heavy disk IO, xmms will die with this message:

[...]

> Should I just call it an xmms bug, or should I start digging for
> hardware problems or kernel bugs?

Well, at least not hardware problems, I think. I don't know anything 
about messages that xmms throws, but it hangs regularly under heavy 
disk load. Usually clicking pause and play is enough to bring it back.
In case of doing anything else it hangs completely. 
I have Athlon XP 1700+, sound via via82xx, ATA-100, 
kernel 2.6.1 (with 2.6.0 was the same). 
Had no problems with 2.4, but haven't used alsa then. Maybe i'll try to
debug it a bit more if i find some time. 
chears, 

-- 
Piotr Kowalczyk <pikov@piasta.pl>
PRDKW (iols)


^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2004-01-27 10:36 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2004-01-26 23:05 Strange xmms deaths under high disk load Måns Rullgård
2004-01-26 23:27 ` Nick Piggin
2004-01-26 23:45   ` Måns Rullgård
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2004-01-27 10:36 Piotr Kowalczyk

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