Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Martin Pool wrote: > To reassign it you need to click on the "Affects Baltix" link, click > "Also affects distribution", then choose "Ubuntu". Then you can mark > the report for Baltix as invalid. This is perhaps not the most obvious > way to correct a fairly easy mistake :} but that's how you d

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Martin Pool
On 23 Jun 2006, Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: > The dstat results are vastly different across the two kernels > even though the hdparm settings are identical. OK, it's good to eliminate it. > I've raised an Ubuntu bug against linux-image-2.6.15-25-686 : > > https://launchpa

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Andrew Bennetts
Erik de Castro Lopo wrote: [...] > > I've raised an Ubuntu bug against linux-image-2.6.15-25-686 : > > https://launchpad.net/distros/baltix/+bug/50741 > > Unfortunately, I screwed up an logged it under Baltix (wtf is that?) > instead of Ubuntu. Is there some way I can fix that? Click the "D

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Steve Kowalik
On Fri, 23 Jun 2006 14:20:25 +1000, Erik de Castro Lopo uttered > https://launchpad.net/distros/baltix/+bug/50741 > > Unfortunately, I screwed up an logged it under Baltix (wtf is that?) > instead of Ubuntu. Is there some way I can fix that? > I just had a look at the bug, and it looks like y

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Erik de Castro Lopo wrote: > I think I'll go back to kernel 2.6.15-23-686 and get some dstat > results and then compare those results with what I'm getting with > 2.6.15-25-686. The dstat results are vastly different across the two kernels even though the hdparm settings are identical. I've rais

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Matthew Hannigan
On Fri, Jun 23, 2006 at 01:39:20PM +1000, Phil Scarratt wrote: > In most cases it doesn't - just that in my case it was and was slowing > things right down - something was borked. As I don't use locate that > much, it didn't bother me stopping it. Bit of random data for y'all: updatedb (almost)

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Phil Scarratt
Simon Wong wrote: On Fri, 2006-06-23 at 10:00 +1000, Phil Scarratt wrote: I stopped it from running altogether, which I believe means you have to stop using locate (no big deal). It shouldn't take too long to update anyway. I find locate very useful to have. In most cases it doesn't - just

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Simon Wong wrote: > It shouldn't take too long to update anyway. I find locate very useful > to have. I have proved to myself that updated is not the problem so I'll be keeping it :-). Erik -- +---+ Erik de Castro Lopo +---

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Simon Wong
On Fri, 2006-06-23 at 10:00 +1000, Phil Scarratt wrote: > I stopped it from running altogether, which I believe means you have to > stop using locate (no big deal). It shouldn't take too long to update anyway. I find locate very useful to have. -- Simon Wong <[EMAIL PROTECTED]> -- SLUG - Sy

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Martin Visser
Yeah, this is a classic - i have one breezy box that is a little old , and occasionally the DMA reverts to disabled - performance becomes bog slow. Running hdparm -d 1 /dev/hda fixies it again. If you do a simple file copy of a large file, you should be able to sustain 5MB/s read and write simult

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Martin Pool wrote: > sudo hdparm /dev/hda Well the existing setting were not too bad: /dev/hda: multcount= 0 (off) IO_support = 0 (default 16-bit) unmaskirq= 0 (off) using_dma= 1 (on) keepsettings = 0 (off) readonly = 0 (off) reada

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Martin Pool
On 23 Jun 2006, Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: > Anyway, it does seem to be spending way too much time in wait and idle > when it should doing some bloody processing. You might want to try changing hdparm parameters; in particular something like sudo hdparm /dev/hda sudo hdp

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Martin Visser wrote: > I'd suggest you install and run "dstat" and look for whether the CPU > is in wait a lot - this would indicate some sort of I'O related issue. Ok, got it. Running it in 2.6.15-25-686 with my test program an very little else running I get: > dstat total-cpu-usage -d

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Phil Scarratt
Erik de Castro Lopo wrote: Erik de Castro Lopo wrote: Problem disappears with 2.6.15-23-686. Looks like 2.6.15-25-686 is borked. Ooops, I spoke too soon. First run on my test suite after booting to 2.6.15-23-686 ran fine. Second run was slow again. I do notice that when things are running sl

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Jeff Waugh
> Jeff Waugh wrote: > > > You shouldn't be seeing updatedb at all, unless it's being run by cron > > (in the morning) or anacron (after boot). > > That was within about 5 minutes of a boot. > Weird. updatedb running at startup on a laptop isn't very weird. :-) - Jeff -- GUADEC 2006: Vilano

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Martin Visser
I'd suggest you install and run "dstat" and look for whether the CPU is in wait a lot - this would indicate some sort of I'O related issue. On 6/23/06, Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: Erik de Castro Lopo wrote: > Problem disappears with 2.6.15-23-686. Looks like 2.6.15-25-686 > i

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Jeff Waugh wrote: > You shouldn't be seeing updatedb at all, unless it's being run by cron (in > the morning) or anacron (after boot). That was within about 5 minutes of a boot. This problem is somewhat elusive. On my machine 2.6.15-25-686 is definitely borked, but I have seen the problem on 2.6

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Jeff Waugh
>8227 root 26 10 1788 732 504 R 2.3 0.1 0:06.15 updatedb > > I don't think I should be seeing those at the top. You shouldn't be seeing updatedb at all, unless it's being run by cron (in the morning) or anacron (after boot). - Jeff -- GUADEC 2006: Vilanova i la GeltrĂș, Spain

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Erik de Castro Lopo wrote: > Problem disappears with 2.6.15-23-686. Looks like 2.6.15-25-686 > is borked. Ooops, I spoke too soon. First run on my test suite after booting to 2.6.15-23-686 ran fine. Second run was slow again. I do notice that when things are running slow, top shows these two pro

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Andrew Bennetts wrote: > I've found my system (or just X?) I'm not noticing X, or general CPU performance, only disk access. > seems very sluggish in general for me with > 2.6.15-25-686, compared to 2.6.15-23-686. Problem disappears with 2.6.15-23-686. Looks like 2.6.15-25-686 is borked. Erik

Re: [SLUG] Dapper : slow disk access?

2006-06-22 Thread Andrew Bennetts
On Thu, Jun 22, 2006 at 10:50:39PM +1000, Erik de Castro Lopo wrote: > Hi all, > > I've been running Dapper on my laptop for over month now, but just > in the last day or so I've been noticing really slow disk access. > > For instance, one of the test suite programs for libsndfile is taking > ove

[SLUG] Dapper : slow disk access?

2006-06-22 Thread Erik de Castro Lopo
Hi all, I've been running Dapper on my laptop for over month now, but just in the last day or so I've been noticing really slow disk access. For instance, one of the test suite programs for libsndfile is taking over a minute to run on the laptop (1.1GHz CPU) and runs in under 6 seconds on my anci