* PROBLEM: Heavy iowait on 2.6 kernels
@ 2004-06-11 8:35 Guy Van Sanden
2004-06-12 6:31 ` Nick Piggin
2004-06-16 6:15 ` Clint Byrum
0 siblings, 2 replies; 6+ messages in thread
From: Guy Van Sanden @ 2004-06-11 8:35 UTC (permalink / raw)
To: linux-kernel
I recently discovered why my new Gentoo server slows to a crawl on a
intermediate load on the 2.6 kernel series. The reason seems to be an
unusual amount of iowait.
I can reproduce this on two systems, one with a KT400 and and one with
Sis735 chipset.
iostat -c 1 (or vmstat) while running something like bonnie produces
iowaits of 99%.
Any 2.6 kernel responds the same (regardless of the patchset), even
vanilla. (2.6.5-mm, 2.6.6-mm, 2.6.6-vanilla and 2.6.5-gentoo-r1).
Any 2.4-series kernel is fine.
This is a sample iostat output
--
avg-cpu: %user %nice %sys %iowait %idle
26.73 0.00 10.89 62.38 0.00
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 13.00 87.00 0.00
avg-cpu: %user %nice %sys %iowait %idle
1.01 0.00 16.16 82.83 0.00
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 11.88 88.12 0.00
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 1.01 98.99 0.00
avg-cpu: %user %nice %sys %iowait %idle
0.99 0.00 2.97 96.04 0.00
--
--
______________________________________________________________________
Guy Van Sanden
http://unixmafia.port5.com
Registered Linux user #249404 - September 1997
______________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: PROBLEM: Heavy iowait on 2.6 kernels
2004-06-11 8:35 PROBLEM: Heavy iowait on 2.6 kernels Guy Van Sanden
@ 2004-06-12 6:31 ` Nick Piggin
2004-06-16 6:15 ` Clint Byrum
1 sibling, 0 replies; 6+ messages in thread
From: Nick Piggin @ 2004-06-12 6:31 UTC (permalink / raw)
To: Guy Van Sanden; +Cc: linux-kernel
Guy Van Sanden wrote:
> I recently discovered why my new Gentoo server slows to a crawl on a
> intermediate load on the 2.6 kernel series. The reason seems to be an
> unusual amount of iowait.
> I can reproduce this on two systems, one with a KT400 and and one with
> Sis735 chipset.
>
> iostat -c 1 (or vmstat) while running something like bonnie produces
> iowaits of 99%.
> Any 2.6 kernel responds the same (regardless of the patchset), even
> vanilla. (2.6.5-mm, 2.6.6-mm, 2.6.6-vanilla and 2.6.5-gentoo-r1).
> Any 2.4-series kernel is fine.
>
Hi, can you try booting with elevator=deadline, please?
Then include a vmstat 1 output for a 2.6 and a 2.4 kernel.
I don't think 2.4 kernels will show iowait, so some real
performance measurements would be helpful.
Thanks
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PROBLEM: Heavy iowait on 2.6 kernels
2004-06-11 8:35 PROBLEM: Heavy iowait on 2.6 kernels Guy Van Sanden
2004-06-12 6:31 ` Nick Piggin
@ 2004-06-16 6:15 ` Clint Byrum
2004-06-16 7:25 ` Guy Van Sanden
1 sibling, 1 reply; 6+ messages in thread
From: Clint Byrum @ 2004-06-16 6:15 UTC (permalink / raw)
To: linux-kernel
On Fri, 2004-06-11 at 01:35, Guy Van Sanden wrote:
> I recently discovered why my new Gentoo server slows to a crawl on a
> intermediate load on the 2.6 kernel series. The reason seems to be an
> unusual amount of iowait.
This appears similar to the problem both myself and Phy Prahbab reported
about 2.6 and hitting the disks too often.
I'm wondering, what kind of workload does your machine see, and what
sort of disk system is in it?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PROBLEM: Heavy iowait on 2.6 kernels
2004-06-16 6:15 ` Clint Byrum
@ 2004-06-16 7:25 ` Guy Van Sanden
2004-06-16 7:45 ` Nick Piggin
0 siblings, 1 reply; 6+ messages in thread
From: Guy Van Sanden @ 2004-06-16 7:25 UTC (permalink / raw)
To: Clint Byrum; +Cc: linux-kernel
My machine is heavily used for all kinds of file serving (mainly nfs),
but also samba.
Next to that, it is my home-server, so it runs apache2 (tuned to server
only few clients), imap (cyrus), postfix, bugzilla (mysql) and distcc
(used only a few times a week).
It replaces a FreeBSD system (PII-333) running the same except distcc.
Under
The disk system is just a regular IDE disk (udma5) (60GB) and one
external drive over USB2 (160 GB). The external drive is rather slow
(20-30 MB/sec), so I disabled it during the tests.
The weird thing is that I see this problem too when only running bonnie.
A friend of mine tried that too under 2.6.6, his iowait went up to
0.15%, mine to 99%.
On Wed, 2004-06-16 at 08:15, Clint Byrum wrote:
> On Fri, 2004-06-11 at 01:35, Guy Van Sanden wrote:
> > I recently discovered why my new Gentoo server slows to a crawl on a
> > intermediate load on the 2.6 kernel series. The reason seems to be an
> > unusual amount of iowait.
>
> This appears similar to the problem both myself and Phy Prahbab reported
> about 2.6 and hitting the disks too often.
>
> I'm wondering, what kind of workload does your machine see, and what
> sort of disk system is in it?
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
______________________________________________________________________
Guy Van Sanden
http://unixmafia.port5.com
Registered Linux user #249404 - September 1997
______________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PROBLEM: Heavy iowait on 2.6 kernels
2004-06-16 7:25 ` Guy Van Sanden
@ 2004-06-16 7:45 ` Nick Piggin
2004-06-16 12:21 ` Guy Van Sanden
0 siblings, 1 reply; 6+ messages in thread
From: Nick Piggin @ 2004-06-16 7:45 UTC (permalink / raw)
To: Guy Van Sanden; +Cc: Clint Byrum, linux-kernel
Guy Van Sanden wrote:
> My machine is heavily used for all kinds of file serving (mainly nfs),
> but also samba.
> Next to that, it is my home-server, so it runs apache2 (tuned to server
> only few clients), imap (cyrus), postfix, bugzilla (mysql) and distcc
> (used only a few times a week).
> It replaces a FreeBSD system (PII-333) running the same except distcc.
> Under
>
> The disk system is just a regular IDE disk (udma5) (60GB) and one
> external drive over USB2 (160 GB). The external drive is rather slow
> (20-30 MB/sec), so I disabled it during the tests.
>
> The weird thing is that I see this problem too when only running bonnie.
> A friend of mine tried that too under 2.6.6, his iowait went up to
> 0.15%, mine to 99%.
>
The CPU can very easily max out the disks of course. If bonnie is
doing IO to files much larger than memory, it wouldn't be surprising
for io-wait to get close to 100%. Possibly your friend was doing all
IO out of cache?
If you definitely have a performance problem, set "Kernel Debugging"
on in the "Kernel Hacking" menu, then set "Magic SysRq key" on. When
your system hits this iowait problem, press Alt+SysRq+T a couple of
times over a few seconds.
Then post the output of `dmesg -s 1000000`.
We'll see what is waiting where.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PROBLEM: Heavy iowait on 2.6 kernels
2004-06-16 7:45 ` Nick Piggin
@ 2004-06-16 12:21 ` Guy Van Sanden
0 siblings, 0 replies; 6+ messages in thread
From: Guy Van Sanden @ 2004-06-16 12:21 UTC (permalink / raw)
To: Nick Piggin; +Cc: linux-kernel
Below is a trace for my workstation during an rsync from the server to
the station (the station is Gentoo-rsync mirror).
060e7>] syscall_call+0x7/0xb
netstat Z C0486120 0 11825 11683 11826 (L-TLB)
d27bbf88 00200046 df0974b0 c0486120 df0974b0 00000011 00200296 d15a4180
df097508 00000000 df097548 00003eee cb7eee89 0000004b df097658 dffeea60
00000000 df0974b0 00000000 c011fa86 df0974b0 dfde9f80 df997880 df9978a0
Call Trace:
[<c011fa86>] do_exit+0x276/0x400
[<c011fcaa>] do_group_exit+0x3a/0xb0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486120 0 11826 11683 11827 11825 (NOTLB)
d2dabf10 00200086 d8521130 c0486120 00000010 c03ced0c 00000000 000000d0
62170b66 00000000 d2dabf24 000005f6 508846fc 0000009a d85212d8 000535f3
d2dabf24 d2dabf68 000007d1 c036a463 d2dabf24 000535f3 d15b1580 c048bee0
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c01648ea>] do_poll+0xaa/0xd0
[<c0164a92>] sys_poll+0x182/0x270
[<c0163e30>] __pollwait+0x0/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486150 0 11827 11826 11828 (NOTLB)
d90f9f94 00200086 d4fd8030 c0486150 00000091 d90f9f6c 00000001 d137b260
e35b4864 00000091 d4fd8030 0002f316 e35ba32a 00000091 d2dacd98 d90f8000
d90f9fc4 427368f8 d90f8000 c0105235 d90f9fb0 427368f8 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486150 0 11828 11826 11829 11827 (NOTLB)
d571df94 00200086 d4fd8030 c0486150 00000091 d571df6c 00000001 d137b260
e83b46cb 00000091 d4fd8030 00021098 e83bcfe0 00000091 d981c798 d571c000
d571dfc4 42f368f8 d571c000 c0105235 d571dfb0 42f368f8 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486150 0 11829 11826 11830 11828 (NOTLB)
d1e39f94 00200086 cdd647b0 c0486150 00000091 d1e39f6c 00000001 d137b260
e7221296 00000091 cdd647b0 0004cf22 e72ae555 00000091 d8520258 d1e38000
d1e39fc4 437688f8 d1e38000 c0105235 d1e39fb0 437688f8 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486120 0 11830 11826 11831 11829 (NOTLB)
d4f53f94 00200086 d981cb70 c0486120 d0b9cc00 c15daec0 c15daec0 c0167fe2
c15daec0 00000000 00000000 0000a626 1015bcc3 0000004c d981cd18 d4f52000
d4f53fc4 440ff908 d4f52000 c0105235 d4f53fb0 440ff908 00000008 80000000
Call Trace:
[<c0167fe2>] dput+0x22/0x270
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486120 0 11831 11826 11832 11830 (NOTLB)
d7cb3f94 00200086 d981c070 c0486120 d034fe40 d7cb3f6c 00000001 d034fe60
00000001 00000000 d981c5f0 00011d11 21a230b3 0000004c d981c218 d7cb2000
d7cb3fc4 448ff908 d7cb2000 c0105235 d7cb3fb0 448ff908 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C0486120 0 11832 11826 11838 11831 (NOTLB)
d02d9f94 00200086 d2dac0f0 c0486120 f41098f5 4898f7fd 80a4b6d0 b6ec3f14
00000000 00000000 d8521130 00005fb1 0fb81cb9 0000004c d2dac298 d02d8000
d02d9fc4 450ff908 d02d8000 c0105235 d02d9fb0 450ff908 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
evolution S C04865C8 0 11838 11826 11832 (NOTLB)
cfe4ff94 00200086 da737370 c04865c8 0000006a 00000001 d395b000 cfe4ff64
4c3caa2c 0000006a da737370 001fa233 4c531bb6 0000006a d2b918d8 cfe4e000
cfe4ffc4 459538f8 cfe4e000 c0105235 cfe4ffb0 459538f8 00000008 80000000
Call Trace:
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
kdeinit S C0486150 0 14479 11599 14834 17789 11645 (NOTLB)
cd40deb4 00200086 d4fd8b30 c0486150 0000009a 00000001 cd585930 00000010
b7a9f8bc 0000009a d4fd8b30 00001daf b7a9f8bc 0000009a cd585ad8 0005350f
cd40dec8 0000000e 0000000e c036a463 cd40dec8 0005350f d581891c cee87f64
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c01060e7>] syscall_call+0x7/0xb
ssh S C0486120 0 14834 14479 18109 (NOTLB)
cd3ebeb4 00200086 cd5848b0 c0486120 0000009a c03ced0c 00000000 000000d0
b0a5dbd8 0000009a cd585930 000000a2 b0a6da5f 0000009a cd584a58 00000000
7fffffff 00000005 00000005 c036a4b5 c026ee1c d581f000 d581f91c cd3ebf44
Call Trace:
[<c036a4b5>] schedule_timeout+0xb5/0xc0
[<c026ee1c>] normal_poll+0x10c/0x150
[<c026a9e5>] tty_poll+0x65/0x80
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c0151be1>] vfs_write+0xd1/0x130
[<c01060e7>] syscall_call+0x7/0xb
xmms S C0486150 0 17789 11599 17790 18369 14479 (NOTLB)
ce703f10 00200086 cdd647b0 c0486150 0000009a 000000d0 d224b980 ce703fa0
b977b106 0000009a cdd647b0 000024b7 b978a5f6 0000009a d2b902d8 0005350d
ce703f24 ce703f68 0000000a c036a463 ce703f24 0005350d ced44600 c048b7b0
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c01648ea>] do_poll+0xaa/0xd0
[<c0164a92>] sys_poll+0x182/0x270
[<c0163e30>] __pollwait+0x0/0xd0
[<c01060e7>] syscall_call+0x7/0xb
xmms S C0486150 0 17790 17789 17791 (NOTLB)
cee8df10 00200086 d2b90130 c0486150 0000009a c03ced0c 00000000 000000d0
ac137123 0000009a d2b90130 0000244d ac13b2c1 0000009a d2b91358 00053bf3
cee8df24 cee8df68 000007d1 c036a463 cee8df24 00053bf3 cfab2500 c048c120
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c01648ea>] do_poll+0xaa/0xd0
[<c0164a92>] sys_poll+0x182/0x270
[<c0163e30>] __pollwait+0x0/0xd0
[<c01060e7>] syscall_call+0x7/0xb
xmms S C0486120 0 17791 17790 17792 (NOTLB)
ce90feb4 00200086 d2b906b0 c0486120 cd311b00 00000001 d2b906b0 00000010
c03ced0c 00000000 cdd64d30 000007d6 b960190b 0000009a d2b90858 00053565
ce90fec8 00000005 00000005 c036a463 ce90fec8 00053565 00000004 c048ba70
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c01529fb>] __fput+0xbb/0x120
[<c01511f1>] sys_close+0x61/0xa0
[<c01060e7>] syscall_call+0x7/0xb
xmms S C04865C8 0 17792 17790 17793 17791 (NOTLB)
cd3dfeb4 00200086 cd585930 c04865c8 00000082 00000001 cdd65830 00000010
8a6587cc 00000082 cd585930 000001f2 8a67a067 00000082 cdd659d8 00000000
7fffffff 0000000b 0000000b c036a4b5 d084d500 00000400 0000000a c034fa8b
Call Trace:
[<c036a4b5>] schedule_timeout+0xb5/0xc0
[<c034fa8b>] unix_poll+0x2b/0xa0
[<c03027a9>] sock_poll+0x29/0x40
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c0151a10>] vfs_read+0xf0/0x130
[<c01060e7>] syscall_call+0x7/0xb
xmms S C04865C8 0 17793 17790 17797 17792 (NOTLB)
cd9dff94 00200086 cdd65830 c04865c8 00000082 c0107ead 00100100 00200200
8a5c6663 00000082 cdd65830 00000a8e 8a678ee1 00000082 cdd65458 cd9de000
cd9dffc4 4303f9d8 cd9de000 c0105235 cd9dffb0 4303f9d8 00000008 80000000
Call Trace:
[<c0107ead>] do_IRQ+0xfd/0x130
[<c0105235>] sys_rt_sigsuspend+0xa5/0xd0
[<c01060e7>] syscall_call+0x7/0xb
xmms S C0486120 0 17797 17790 18294 17793 (NOTLB)
cee87f50 00200086 d2b90c30 c0486120 00000099 cdd64d30 c0486120 00000001
8f1392d6 00000000 cee87f64 00004e6a 9c45ebe0 0000009a d2b90dd8 0005350f
cee87f64 1ddca6a7 00000000 c036a463 cee87f64 0005350f cee87f64 c048b7c0
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c012566e>] sys_nanosleep+0xde/0x170
[<c01060e7>] syscall_call+0x7/0xb
bash S C04865C8 0 18109 14479 14834 (NOTLB)
cdd63e8c 00200086 da737370 c04865c8 00000081 d5816000 d395b000 cdd63e68
4a511536 00000081 da737370 00006ebc 4a53fbd1 00000081 cd7f8f18 00000001
7fffffff cd39f2c0 cc8f5000 c036a4b5 cdd63fc4 cdd63f08 00000011 c01058ed
Call Trace:
[<c036a4b5>] schedule_timeout+0xb5/0xc0
[<c01058ed>] setup_frame+0xed/0x1f0
[<c0134f95>] unlock_page+0x15/0x60
[<c026e958>] read_chan+0x678/0x810
[<c011a4f0>] default_wake_function+0x0/0x20
[<c011a4f0>] default_wake_function+0x0/0x20
[<c026960d>] tty_write+0x17d/0x290
[<c026e2e0>] read_chan+0x0/0x810
[<c0269467>] tty_read+0x127/0x150
[<c0269490>] tty_write+0x0/0x290
[<c01519d8>] vfs_read+0xb8/0x130
[<c0151c82>] sys_read+0x42/0x70
[<c01060e7>] syscall_call+0x7/0xb
xmms S C0486120 0 18294 17790 18295 17797 (NOTLB)
cc0e9f50 00200086 cdd64d30 c0486120 0000000c cd5f26c0 d988d4ac cc0e9e5c
cc0e9f2c 00000000 cbb55a30 0000024f b9646012 0000009a cdd64ed8 0005350d
cc0e9f64 00a7d827 00000000 c036a463 cc0e9f64 0005350d 00000000 ce703f24
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c012566e>] sys_nanosleep+0xde/0x170
[<c01060e7>] syscall_call+0x7/0xb
xmms-arts-hel S C0486120 0 18295 18294 (NOTLB)
cc0a5eb4 00000086 cdd647b0 c0486120 0000009a 00000001 cdd647b0 00000010
b976cc55 00000000 cbb55a30 000000bd b978ad5a 0000009a cdd64958 00053517
cc0a5ec8 0000000d 0000000d c036a463 cc0a5ec8 00053517 0000000c c048b800
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c01060e7>] syscall_call+0x7/0xb
kdeinit S C0486150 0 18369 11599 18370 18373 17789 (NOTLB)
cd39beb4 00200086 df1039f0 c0486150 0000009a 00000001 cdd64230 00000010
b7a78990 0000009a df1039f0 000025d9 b7a78990 0000009a cdd643d8 0005350d
cd39bec8 0000000c 0000000c c036a463 cd39bec8 0005350d d581c91c cc0e9f64
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c01060e7>] syscall_call+0x7/0xb
ssh S C0486120 0 18370 18369 (NOTLB)
cc2c7eb4 00200086 cd584330 c0486120 00000010 c03ced0c 00000000 000000d0
d581c000 000000d0 cf1b40c0 00000410 a31c0c2b 0000009a cd5844d8 00000000
7fffffff 00000005 00000005 c036a4b5 c026ee1c d4c8e000 d4c8e91c cc2c7f44
Call Trace:
[<c036a4b5>] schedule_timeout+0xb5/0xc0
[<c026ee1c>] normal_poll+0x10c/0x150
[<c026a9e5>] tty_poll+0x65/0x80
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c0151be1>] vfs_write+0xd1/0x130
[<c01060e7>] syscall_call+0x7/0xb
kdeinit S C0486120 0 18373 11599 18374 18369 (NOTLB)
cc561eb4 00200086 cd5853b0 c0486120 0000009a 00000001 cd5853b0 00000010
c03ced0c 00000000 cc561ec8 000034bf b8182bbc 0000009a cd585558 0005351e
cc561ec8 0000000c 0000000c c036a463 cc561ec8 0005351e d581991c c048b838
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c016416f>] do_select+0x18f/0x2d0
[<c0163e30>] __pollwait+0x0/0xd0
[<c016459f>] sys_select+0x2bf/0x4d0
[<c01060e7>] syscall_call+0x7/0xb
bash S C0486150 0 18374 18373 18425 (NOTLB)
cc57ff3c 00200086 cdd647b0 c0486150 00000092 cd584e30 c0118bdc cd4a4dc0
d94980dc 00000092 cdd647b0 00025359 d958bf7c 00000092 cd584fd8 fffffe00
cc57e000 cd584ec8 cd584ec8 c0120304 ffffffff 00000002 cd7f92f0 0000001d
Call Trace:
[<c0118bdc>] do_page_fault+0x32c/0x50c
[<c0120304>] sys_wait4+0x194/0x270
[<c011a4f0>] default_wake_function+0x0/0x20
[<c023666e>] copy_to_user+0x3e/0x50
[<c011a4f0>] default_wake_function+0x0/0x20
[<c0128080>] sys_rt_sigprocmask+0xa0/0x100
[<c0120407>] sys_waitpid+0x27/0x2b
[<c01060e7>] syscall_call+0x7/0xb
vmstat S C0486120 0 18425 18374 (NOTLB)
cca95f50 00200086 cd7f92f0 c0486120 cca94000 dbe29000 cd591440 cca95f30
cc034440 00000000 cca95f64 00003244 8fe75458 0000009a cd7f9498 00053633
cca95f64 000f41a7 00000001 c036a463 cca95f64 00053633 00000000 dec85f64
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c012566e>] sys_nanosleep+0xde/0x170
[<c01060e7>] syscall_call+0x7/0xb
rsync R running 0 18509 9259 (NOTLB)
udev S C04865C8 0 18544 141 18546 (NOTLB)
dec85f50 00000082 da737370 c04865c8 0000009a dec85f38 d395b000 dec84000
91e55ead 0000009a da737370 00007683 91e55ead 0000009a df723998 00053655
dec85f64 000f41a7 00000001 c036a463 dec85f64 00053655 00000000 df747f64
Call Trace:
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c012566e>] sys_nanosleep+0xde/0x170
[<c01060e7>] syscall_call+0x7/0xb
udev S C0486120 0 18546 141 18544 (NOTLB)
df747f50 00000082 df82e730 c0486120 df747f7c df747f38 bffff3fc df746000
c015af1f 00000000 cd7f87f0 00007133 98b02a4f 0000009a df82e8d8 000536c7
df747f64 000f41a7 00000001 c036a463 df747f64 000536c7 00000000 c048c0f8
Call Trace:
[<c015af1f>] vfs_stat+0x1f/0x60
[<c036a463>] schedule_timeout+0x63/0xc0
[<c0125570>] process_timeout+0x0/0x10
[<c012566e>] sys_nanosleep+0xde/0x170
[<c01060e7>] syscall_call+0x7/0xb
bash S C0486120 0 18575 11444 (NOTLB)
c8341e8c 00000082 cbb554b0 c0486120 c026c890 dfbc5000 00000000 c8341e68
00000001 31305b07 df7221f0 00014d01 29ca1466 0000009a cbb55658 00000001
7fffffff dba87ec0 da359000 c036a4b5 dfbc5000 c0273d98 00000000 403c6001
Call Trace:
[<c026c890>] opost_block+0xe0/0x190
[<c036a4b5>] schedule_timeout+0xb5/0xc0
[<c0273d98>] clear_selection+0x18/0x60
[<c026e958>] read_chan+0x678/0x810
[<c011a4f0>] default_wake_function+0x0/0x20
[<c011a4f0>] default_wake_function+0x0/0x20
[<c026960d>] tty_write+0x17d/0x290
[<c026e2e0>] read_chan+0x0/0x810
[<c0269467>] tty_read+0x127/0x150
[<c0269490>] tty_write+0x0/0x290
[<c01519d8>] vfs_read+0xb8/0x130
[<c0151c82>] sys_read+0x42/0x70
[<c01060e7>] syscall_call+0x7/0xb
cron R running 0 18605 9518 18606 (NOTLB)
bash S C0486150 0 18606 18605 18632 (NOTLB)
cb88df3c 00000082 cdd647b0 c0486150 0000009a cbb54430 c0118bdc db082940
b89230fd 0000009a cdd647b0 0000fa65 b8a06d09 0000009a cbb545d8 fffffe00
cb88c000 cbb544c8 cbb544c8 c0120304 ffffffff 00000000 cbb55a30 bffff8c0
Call Trace:
[<c0118bdc>] do_page_fault+0x32c/0x50c
[<c0120304>] sys_wait4+0x194/0x270
[<c011a4f0>] default_wake_function+0x0/0x20
[<c011a4f0>] default_wake_function+0x0/0x20
[<c0128080>] sys_rt_sigprocmask+0xa0/0x100
[<c0120407>] sys_waitpid+0x27/0x2b
[<c01060e7>] syscall_call+0x7/0xb
run-crons R running 0 18632 18606 18638 (NOTLB)
rm R running 0 18638 18632 (NOTLB)
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2004-06-16 12:22 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2004-06-11 8:35 PROBLEM: Heavy iowait on 2.6 kernels Guy Van Sanden
2004-06-12 6:31 ` Nick Piggin
2004-06-16 6:15 ` Clint Byrum
2004-06-16 7:25 ` Guy Van Sanden
2004-06-16 7:45 ` Nick Piggin
2004-06-16 12:21 ` Guy Van Sanden
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