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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Bruce Evans <brde@optusnet.com.au>
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Date: Thu, 12 Nov 2009 17:31:22 +0100
In-Reply-To: <20091113022937.P1408@besplex.bde.org> (Bruce Evans's message of
	"Fri, 13 Nov 2009 03:02:45 +1100 (EST)")
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Cc: src-committers@FreeBSD.org, d@delphij.net,
	Peter Jeremy <peterjeremy@acm.org>, svn-src-all@FreeBSD.org,
	Xin LI <delphij@FreeBSD.org>, svn-src-head@FreeBSD.org
Subject: Re: svn commit: r198848 - head/bin/ps
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Bruce Evans <brde@optusnet.com.au> writes:
> Can you imagine NCPU hitting a power wall or other technical barrier at
> not much larger than 64?

Do you have any idea how many threads a modern GPU has?  We're talking
high three to low four digits per die...

SGI built a 51,200-core single system image Itanium cluster for NASA.
Supposedly, it runs a stock Linux kernel.

Closer to home, the Sun T2 has 64 threads per die, and there are
four-way T2 systems (256 threads) on the market already.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no