Re: signifanctly slowdown of FreeBSD 8.0-CURRENT/amd64

From: Attilio Rao <attilio_at_freebsd.org>
Date: Sat, 30 May 2009 18:51:59 +0200
2009/5/30 Attilio Rao <attilio_at_freebsd.org>:
> 2009/5/30 O. Hartmann <ohartman_at_mail.zedat.fu-berlin.de>:
>> Attilio Rao wrote:
>>> 2009/5/30 O. Hartmann <ohartman_at_mail.zedat.fu-berlin.de>:
>>>
>>>> Hello.
>>>> I realized a significant slowdown of FreeBSD 8.0-CURRENT/amd64 on every
>>>> box I run. I have the most recent FreeBSD 8.0-CURRENT/amd64 with custom
>>>> kernel and switched off every debugging. I see a drastic slowdown
>>>> whenever heavy I/O on UFS2 and ZFS partitions is performed and whenever
>>>> some compilation is done (compiling world and kernel). This is horrible
>>>> on a single core Athlon64 CPU with 2GB RAM as well as on a 4 core Q6600
>>>> with 8GB and a server with 2 x 4-cores and 16GB RAM.
>>>>
>>>> I can not say clearly whether I/O is the bottleneck. Maybe something
>>>> with the memory subsystem, when it comes to compiler runs, when no disk
>>>> I/O is done but the box is still horrible slow. This behaviour occured
>>>> several weeks ago, not being able to specify it more precisely.
>>>>
>>>> AQre there any issues at the moment?
>>>>
>>>
>>> Your kernel is compiled from which date?
>>>
>>> Thanks,
>>> Attilio
>>>
>>>
>>>
>> Most recent, say: yesterday! As well as world.
>
> Can you try to revert only r193011 and see if something changes?

Also, did you compile the single-core athlon64 without the option SMP?

Thanks,
Attilio


-- 
Peace can only be achieved by understanding - A. Einstein
Received on Sat May 30 2009 - 14:52:01 UTC

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