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Date:      Sat, 28 Jun 2003 01:02:38 -0700
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Glenn Johnson <gjohnson@srrc.ars.usda.gov>
Cc:        current@freebsd.org
Subject:   Re: Hyperthreading
Message-ID:  <3EFD4B9E.85A20B31@mindspring.com>
References:  <20030627181836.GA81335@node1.cluster.srrc.usda.gov> <20030627233912.GA90348@gforce.johnson.home>

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Glenn Johnson wrote:
> Thanks.  I had read the smp manual page.  I know _how_ to enable HTT; I
> was wondering whether I _should_ enable it.  It seems the answer is that
> it is not beneficial in its current state because the scheduler does not
> yet differentiate between physical and logical processors.

Windows does a lot better on the SPECmarks benchmark if you
*disable* it.  Your mileage may vary, but to me it has always
seemed like "Computer Marketecture"...

-- Terry



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