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From: Dirk Heinrichs <dirk.heinrichs@altum.de>
Newsgroups: comp.lang.ada
Subject: Re: Ada 2012 automatic concurrency?
Date: Thu, 27 Dec 2012 09:59:44 +0100
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Date: 2012-12-27T09:59:44+01:00
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charleshixsn@earthlink.net wrote:

> IIUC, there shouldn't be more than about twice as many tasks as cores.  Is
> this about right?

Hmm, taking into account that your application isn't alone on your system 
and task switches have their price, too, I think you'd better go with "# of 
CPUs/Cores + 1", like the Gentoo Linux Handbook suggests for the level of 
parallel compilation:

"A good choice is the number of CPUs (or CPU cores) in your system plus one, 
but this guideline isn't always perfect." [1]

However, I'm still confused about the "+1".

Sometimes it may also be application dependent, so you should try different 
models to find the one that suits you best.

HTH...

	Dirk

[1]: http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=5
-- 
Dirk Heinrichs <dirk.heinrichs@altum.de>
Tel: +49 (0)2471 209385 | Mobil: +49 (0)176 34473913
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