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SubjectRe: Linux responsiveness under heavy load


Hi,

This was on 2.2.14-15mdk (Mandrake 7.0)

I will try to reproduce the bug ASAP, and will try the patch as well.

Thanks for the help.

On Thu, 9 Mar 2000, Andrea Arcangeli wrote:

|Date: Thu, 9 Mar 2000 00:07:52 +0100 (CET)
|From: Andrea Arcangeli <andrea@suse.de>
|To: Nicolas MONNET <nico@monnet.to>
|Cc: linux-kernel@vger.rutgers.edu
|Subject: Re: Linux responsiveness under heavy load
|
|On Wed, 8 Mar 2000, Nicolas MONNET wrote:
|
|>I've noticed that under heavy loads, and actually, not so heavy loads,
|>Linux's responsiveness is effectively very poor.
|
|Which kernel version are you using?
|
|>[..] The
|>system isn't even swapping, [..]
|
|Supposing you are using 2.2.x if it wasn't VM related it's probably the
|elevator starvation thing. Could you try again with 2.2.14aa10 (it
|includes elevator-starvation-6.gz):
|
| ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.14aa10.gz
|
|For reference the elevator-starvation-6.gz patch alone is here:
|
| ftp://ftp.*.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.14aa10/elevator-starvation-6.gz
|
|>It's not like there's a bunch of runaway processe: at most, 5 processes
|>are running.
|
|To be sure about what's going on could you provide me a `vmstat 1` log
|of before/during/after the performance drop?


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