On 22 May 2014, at 13:27, Christos Zoulas <chris...@astron.com> wrote:

> In article <0e8bfcfc-c4cd-4ce3-8bac-22eb8ebd3...@eis.cs.tu-bs.de>,
> J. Hannken-Illjes <hann...@eis.cs.tu-bs.de> wrote:
>> On 22 May 2014, at 03:15, Christos Zoulas <chris...@astron.com> wrote:
>> 
>>> In article <lljiob$ha3$1...@ger.gmane.org>,
>>> Christos Zoulas <chris...@astron.com> wrote:
<snip>
>>> Although this improves the situation the machine still has large pauses.
>>> - compile a kernel with lockdebug.
>> 
>> No performance tests with LOCKDEBUG or DEBUG please.  These options
>> are known to be very expensive.
> 
> LOCKDEBUG and DEBUG were usable before. Now they are not. They are just
> mentioned here to easily demonstrate the problem.

Ok, so I tried a kernel with DEBUG+LOCKDEBUG and get the same problems
you describe:  every 10 to 20 seconds I get hickups of 1 to 2 seconds.

Christos, just to make it clear:  Do you have these problems when
running a GENERIC or better GENERIC -DIAGNOSTICS kernel?

--
J. Hannken-Illjes - hann...@eis.cs.tu-bs.de - TU Braunschweig (Germany)

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