AMD64 system slow/unresponsive during disk access...

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Yamakuzure · Post by **Yamakuzure** » Sat Sep 12, 2009 8:44 am

wrc1944 wrote:For those having this problem, especially if they have SATA drives, it would probably be worth a shot to try the deadline scheduler instead of cfq.
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Code: Select all
 elevator=deadline

For me this has started a nightmare. Once I rebooted the system almost stopped on the tiniest bit of disk activity. While starting openOffice Calc I had to wait 16 (sixteen!) seconds until a page in firefox started scrolling when I used the mouse wheel.

It is really frustrating that this problem seems to be so differently and widespread, that it's seemingly impossible to get a grip on (or even an idea about) what the problem actually *is*.

Elv13 · Post by **Elv13** » Sat Sep 12, 2009 5:53 pm

devsk wrote:
Elv13 wrote:So far so good for me! Kernel 2.6.30 was a huge improvement over 2.6.2[0-9] and 2.6.31 seem to ba as stable and fast. And I finally removed debugging support from my kernel, I hope to never have it enable again :p. I think this solve the issue in my case, 64bit Linux is now exploiting the whole potential of my computer!

EDIT: Ignore my comment, skip this kernel, it suck, I am reverting to 2.6.30 right now.
what happened? elaborate please.

Simple, the mouse freeze once again and the system become unresponsive when I emerge something, even the sound lagg, It was almost perfect with my old 2.6.30-rc5 kernel.

Belliash · Post by **Belliash** » Sat Sep 12, 2009 6:20 pm

Elv13 wrote:
devsk wrote:
Elv13 wrote:So far so good for me! Kernel 2.6.30 was a huge improvement over 2.6.2[0-9] and 2.6.31 seem to ba as stable and fast. And I finally removed debugging support from my kernel, I hope to never have it enable again :p. I think this solve the issue in my case, 64bit Linux is now exploiting the whole potential of my computer!

EDIT: Ignore my comment, skip this kernel, it suck, I am reverting to 2.6.30 right now.
what happened? elaborate please.
Simple, the mouse freeze once again and the system become unresponsive when I emerge something, even the sound lagg, It was almost perfect with my old 2.6.30-rc5 kernel.

i follow this thread since some time...
and it is hard for me to confirm anything from what U said.
of course it has some troubles, but i cannot say it depends on amd64 arch...

I cannot remember when mouse freezed last time

however sometime it could be a little bit faster, eg when more tabs opened in firefox...

niick · Post by **niick** » Sat Sep 12, 2009 7:16 pm

I've just tried doing what is suggested here: http://lkml.org/lkml/2009/9/10/229

This is a little subjective but the desktop does feel more responsive. YMMV

Elv13 · Post by **Elv13** » Sat Sep 12, 2009 9:09 pm

@Belliash:
Mouse freeze seem to be the common denominator of this problem, if you don't experience them, then you don't have the problem. Firefox is slow under Linux and even more in 64bit Linux (no asm optimisation). But that not related to this problem.

kernelOfTruth · Post by **kernelOfTruth** » Sat Sep 12, 2009 9:58 pm

niick wrote:I've just tried doing what is suggested here: http://lkml.org/lkml/2009/9/10/229

This is a little subjective but the desktop does feel more responsive. YMMV

++

that setting disables (un)fair scheduling but it's somewhat broken anyways

in addition I've also the following enabled:

echo "100000" > /proc/sys/kernel/sched_latency_ns
#echo "40000000" > /proc/sys/kernel/sched_latency_ns
# default: 40000000 (40.000.000)

echo "200000" > /proc/sys/kernel/sched_min_granularity_ns
#echo "8000000" > /proc/sys/kernel/sched_min_granularity_ns
# default: 8000000 (8.000.000)

lagalopex · Post by **lagalopex** » Sun Sep 13, 2009 3:54 pm

niick wrote:I've just tried doing what is suggested here: http://lkml.org/lkml/2009/9/10/229

This is a little subjective but the desktop does feel more responsive. YMMV

I did so as well. But have no time at the moment to test, but feels good at this point

But there may be some regressions: "CK is working on a new scheduler for Multimedia/Gaming PCs"

natros · Post by **natros** » Tue Sep 15, 2009 1:43 pm

What about BFS Scheduler?
http://www.phoronix.com/scan.php?page=a ... arks&num=1

mamunata · Post by **mamunata** » Wed Sep 16, 2009 6:50 am

noop is the best choice for me at the moment - with kernel 2.6.30-r6, despite in some moments load is 5 and more and mouse and start to freeze

Elv13 · Post by **Elv13** » Fri Sep 18, 2009 9:03 pm

I am back to 2.6.30-vanilla-rc5, until now, it is the best kernel I have tried (I tried 2.6.30-r* too). I think I am going to stay with this one for a long period of time. I upgraded it to GCC 4.4 and disabled kernel hacking, it work even better.

timeBandit · Post by **timeBandit** » Sat Sep 19, 2009 12:30 am

Locked for length (well over 30 pages).
Continued in [topic=793263]AMD64 system slow/unresponsive during disk access (Part 2)[/topic].