linux-kernel - Re: Hyperthreading on 4 core CPU DECREASES performance???

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Message-ID: <e86b7d350910281411k6dfb260dlfce76e260c797a9@mail.gmail.com>
Date:	Wed, 28 Oct 2009 16:11:51 -0500
From:	Igor Chudov <ichudov@...il.com>
To:	Andreas Mohr <andi@...as.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Hyperthreading on 4 core CPU DECREASES performance???

On Wed, Oct 28, 2009 at 3:46 PM, Andreas Mohr <andi@...as.de> wrote:
>> I would like to know how can I make the scheduler to prefer to spread
>> the tasks across physical cores as opposed to bundling two on one core
>> and leaving some cores idle.
>
> Did you have /sys/devices/system/cpu/sched_smt_power_savings activated?

Andreas, no, I did not have it activated, it was set to 0. I did check
it before and double checked it now.
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