From: Peter Williams <pwil3058@bigpond.net.au>
To: Rich Paredes <rparedes@gmail.com>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>, linux-kernel@vger.kernel.org
Subject: Re: SMP Affinity and nice
Date: Thu, 24 Aug 2006 11:30:09 +1000 [thread overview]
Message-ID: <44ED0121.5080702@bigpond.net.au> (raw)
In-Reply-To: <Pine.LNX.4.61.0608231735210.9588@yvahk01.tjqt.qr>
Jan Engelhardt wrote:
>> Subject: SMP Affinity and nice
>>
>> I am trying to come to an understanding as to why 1 process is getting
>> less cpu time than identical processes with a higher "nice" value.
>> Server has 2 physical processors with hyperthreading (cpu 0,1,2,3)
>>
>> I am starting 5 processes that perform a square root loop to max out a
>> cpu. They use the exact same code but are renamed for identification:
>> cpumax1, cpumax2, cpumax3, cpumax4, cpumax5
> [...]
>
> What you describe should be addressed in the -ck patchset (smpnice-...diff)
> Not sure if it is in mainline already, though.
It's coming in 2.6.18.
Rich,
What kernel version are you using when you see this phenomenon?
Peter
--
Peter Williams pwil3058@bigpond.net.au
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
next prev parent reply other threads:[~2006-08-24 1:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-23 15:24 SMP Affinity and nice Rich Paredes
2006-08-23 15:36 ` Jan Engelhardt
2006-08-24 1:30 ` Peter Williams [this message]
[not found] ` <3bfa83ed0608231920h5d9ef2bbxee71badedb38e3f7@mail.gmail.com>
2006-08-24 4:39 ` Peter Williams
2006-08-23 20:54 ` Chris Friesen
2006-08-24 5:24 ` Peter Williams
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