From mboxrd@z Thu Jan  1 00:00:00 1970
From: ron minnich <rminnich@lanl.gov>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] design clairvoyance & the 9 way
In-Reply-To: <Pine.SOL.3.96.1030508210526.4986D-100000@robin.cooper.edu>
Message-ID: <Pine.LNX.4.44.0305082050210.1958-100000@maxroach.lanl.gov>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Date: Thu,  8 May 2003 20:53:33 -0600
Topicbox-Message-UUID: a599a218-eacb-11e9-9e20-41e7f4b1d025

On Thu, 8 May 2003, Joel Salomon wrote:

> On Thu, 8 May 2003, Dan Cross wrote:
> > The current trends seem to be *away* from SMP machines and towards
> > clusters of single-CPU machines
>
> Then why has Intel been pushing hyperthreading? (SMP on a chip)

I wish somebody would tell me. The 1152-node MCR cluster has turned it
off, our 1024-node cluster has turned it off, and a 400-node I know of has
turned it off, and .... darn shame, as it seems like it ought to be a neat
thing, but in practice it's not working out.

An IBM study showed that hyperthreading is great for running chat rooms.
Is that the market?

ron