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Re: Hyperthreading/SMT and NetBSD; how well does it work?

To: Andrew Doran <ad%netbsd.org@localhost>
Subject: Re: Hyperthreading/SMT and NetBSD; how well does it work?
From: David Laight <david%l8s.co.uk@localhost>
Date: Mon, 9 Feb 2009 21:21:26 +0000

On Mon, Feb 09, 2009 at 08:40:10AM +0000, Andrew Doran wrote:
> 
> This can happen if the system is not loaded, but once the load crosses a
> threshold, HT/SMT will be relied upon to provide a benefit.

Even that gain isn't 100% guaranteed because the cache gets shared
between the HT execution units.

        David

-- 
David Laight: david%l8s.co.uk@localhost

References:
- Hyperthreading/SMT and NetBSD; how well does it work?
  - From: Andrew Doran
- Re: Hyperthreading/SMT and NetBSD; how well does it work?
  - From: Andreas Wrede
- Re: Hyperthreading/SMT and NetBSD; how well does it work?
  - From: Matthias Scheler
- Re: Hyperthreading/SMT and NetBSD; how well does it work?
  - From: Andrew Doran

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