* pmdisk performance problem
@ 2003-10-09 19:11 Narayan Desai
2003-10-09 19:21 ` Patrick Mochel
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Narayan Desai @ 2003-10-09 19:11 UTC (permalink / raw)
To: linux-kernel
When using 2.6.0-test7 on an ibm thinkpad t21, pmdisk works properly,
though it takes quite a while to write out pages to disk. On my last
suspend to disk, it took on the order of 8-10 minutes. After this
completed, i was able to successfully resume, fairly speedily, however
my hardware clock was 8-10 minutes behind. Does anyone have any ideas
why this is happening? thanks...
-nld
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:11 pmdisk performance problem Narayan Desai
@ 2003-10-09 19:21 ` Patrick Mochel
2003-10-09 19:39 ` Narayan Desai
2003-10-09 19:39 ` Nigel Cunningham
2003-10-11 11:53 ` Pavel Machek
2 siblings, 1 reply; 7+ messages in thread
From: Patrick Mochel @ 2003-10-09 19:21 UTC (permalink / raw)
To: Narayan Desai; +Cc: linux-kernel
> When using 2.6.0-test7 on an ibm thinkpad t21, pmdisk works properly,
> though it takes quite a while to write out pages to disk. On my last
> suspend to disk, it took on the order of 8-10 minutes. After this
> completed, i was able to successfully resume, fairly speedily, however
> my hardware clock was 8-10 minutes behind. Does anyone have any ideas
> why this is happening? thanks...
Do you know if this was just for the write operation, or also included
stopping all processes?
Could you increase the log-level before you suspend and let me know -- by
looking at the debug messages -- what seems to take the most time?
Thanks,
Pat
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:39 ` Narayan Desai
@ 2003-10-09 19:36 ` Patrick Mochel
2003-10-10 0:29 ` Narayan Desai
0 siblings, 1 reply; 7+ messages in thread
From: Patrick Mochel @ 2003-10-09 19:36 UTC (permalink / raw)
To: Narayan Desai; +Cc: linux-kernel
> Pat> Do you know if this was just for the write operation, or also
> Pat> included stopping all processes?
>
> This was during the write of ~4600 pages to disk.
Hm, that's definitely bad.
> Pat> Could you increase the log-level before you suspend and let me
> Pat> know -- by looking at the debug messages -- what seems to take
> Pat> the most time?
>
> sorry, but how do i do this?
Sorry,
dmesg -n 8
should do it.
Pat
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:11 pmdisk performance problem Narayan Desai
2003-10-09 19:21 ` Patrick Mochel
@ 2003-10-09 19:39 ` Nigel Cunningham
2003-10-11 11:53 ` Pavel Machek
2 siblings, 0 replies; 7+ messages in thread
From: Nigel Cunningham @ 2003-10-09 19:39 UTC (permalink / raw)
To: Narayan Desai; +Cc: Linux Kernel Mailing List
For the clock issue, you need to run /sbin/hwclock --hctosys post resume
(this is not a bug in Software Suspend).
Regards,
Nigel
On Fri, 2003-10-10 at 08:11, Narayan Desai wrote:
> When using 2.6.0-test7 on an ibm thinkpad t21, pmdisk works properly,
> though it takes quite a while to write out pages to disk. On my last
> suspend to disk, it took on the order of 8-10 minutes. After this
> completed, i was able to successfully resume, fairly speedily, however
> my hardware clock was 8-10 minutes behind. Does anyone have any ideas
> why this is happening? thanks...
> -nld
> -
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Evolution (n): A process whereby infinitely improbable events occur with
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:21 ` Patrick Mochel
@ 2003-10-09 19:39 ` Narayan Desai
2003-10-09 19:36 ` Patrick Mochel
0 siblings, 1 reply; 7+ messages in thread
From: Narayan Desai @ 2003-10-09 19:39 UTC (permalink / raw)
To: Patrick Mochel; +Cc: linux-kernel
>>>>> "Pat" == Patrick Mochel <mochel@osdl.org> writes:
>> When using 2.6.0-test7 on an ibm thinkpad t21, pmdisk works
>> properly, though it takes quite a while to write out pages to
>> disk. On my last suspend to disk, it took on the order of 8-10
>> minutes. After this completed, i was able to successfully resume,
>> fairly speedily, however my hardware clock was 8-10 minutes
>> behind. Does anyone have any ideas why this is happening?
>> thanks...
Pat> Do you know if this was just for the write operation, or also
Pat> included stopping all processes?
This was during the write of ~4600 pages to disk.
Pat> Could you increase the log-level before you suspend and let me
Pat> know -- by looking at the debug messages -- what seems to take
Pat> the most time?
sorry, but how do i do this?
thanks..
-nld
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:36 ` Patrick Mochel
@ 2003-10-10 0:29 ` Narayan Desai
0 siblings, 0 replies; 7+ messages in thread
From: Narayan Desai @ 2003-10-10 0:29 UTC (permalink / raw)
To: Patrick Mochel; +Cc: linux-kernel
>>>>> "Pat" == Patrick Mochel <mochel@osdl.org> writes:
Pat> Do you know if this was just for the write operation, or also
Pat> included stopping all processes?
>>
>> This was during the write of ~4600 pages to disk.
Pat> Hm, that's definitely bad.
Pat> Could you increase the log-level before you suspend and let me
Pat> know -- by looking at the debug messages -- what seems to take
Pat> the most time?
>>
>> sorry, but how do i do this?
the particular line that takes the most time is the writing 4700 pages
to disk followed by the dots. each dot takes about 10 seconds to
appear on screen.
I also notice that both hda and hdc are both suspended and resumed
before this point. Is this intentional?
-nld
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: pmdisk performance problem
2003-10-09 19:11 pmdisk performance problem Narayan Desai
2003-10-09 19:21 ` Patrick Mochel
2003-10-09 19:39 ` Nigel Cunningham
@ 2003-10-11 11:53 ` Pavel Machek
2 siblings, 0 replies; 7+ messages in thread
From: Pavel Machek @ 2003-10-11 11:53 UTC (permalink / raw)
To: Narayan Desai; +Cc: linux-kernel
Hi!
> When using 2.6.0-test7 on an ibm thinkpad t21, pmdisk works properly,
> though it takes quite a while to write out pages to disk. On my last
> suspend to disk, it took on the order of 8-10 minutes. After this
> completed, i was able to successfully resume, fairly speedily, however
> my hardware clock was 8-10 minutes behind. Does anyone have any ideas
> why this is happening? thanks...
I have seen this too, with swsusp on x86-64 machine. Suspend took
awfully long, in "writing data" phase.
Pavel
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2003-10-11 11:53 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2003-10-09 19:11 pmdisk performance problem Narayan Desai
2003-10-09 19:21 ` Patrick Mochel
2003-10-09 19:39 ` Narayan Desai
2003-10-09 19:36 ` Patrick Mochel
2003-10-10 0:29 ` Narayan Desai
2003-10-09 19:39 ` Nigel Cunningham
2003-10-11 11:53 ` Pavel Machek
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