linux-kernel - Re: HT (Hyper Threading) aware process scheduling doesn't work as it should

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Message-ID: <20111030151256.27b2b20e@infradead.org>
Date:	Sun, 30 Oct 2011 15:12:56 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Artem S. Tashkinov" <t.artem@...os.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: HT (Hyper Threading) aware process scheduling doesn't work as
 it should

On Sun, 30 Oct 2011 19:57:12 +0000 (GMT)
"Artem S. Tashkinov" <t.artem@...os.com> wrote:

> Hello,
> 
> It's known that if you want to reach maximum performance on HT
> enabled Intel CPUs you should distribute the load evenly between
> physical cores, and when you have loaded all of them you should then
> load the remaining virtual cores.

this is a bold statement, and patently false if you have to threads of
one process that heavily share data between eachother...
(but true for more independent workloads)

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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