Re: VM issue causing high CPU loads

From: Yohan
Date: Mon Aug 31 2009 - 16:39:32 EST

Yohan wrote:
Andrew Morton wrote:
On Mon, 24 Aug 2009 16:23:22 +0200
Yohan <kernel@xxxxxxxxxxxxxxxxxxxxxx> wrote:

Is someone have an idea for that :
Please generate a kernel profile to work out where all the CPU tie is
being spent. Documentation/basic_profiling.txt is a starting point.
I post some new reports, it seems that the problem is in rpcauth_lookup_credcache ...

for information, this is an imap mail server that mounts ~10 netapp over ~300 mountpoints..
I saw that :

I did only:

--- linux- 2009-03-23 23:04:09.000000000 +0100
+++ linux- 2009-05-19 16:02:35.000000000 +0200
@@ -62,8 +62,12 @@ */

And i test it in prod since sunday: i only have 36% of one core used by system
versus more than 3 cores used by system in another server that did a drop_caches at morning...

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