Date   : Fri, 31 Jul 2009 19:50:55 +0100
From   : Andy@... (Andrew Livens)
Subject: Units of memory, Was: Master Ethernet upgrade

I think that's more down to the way the OS is managing the application
than the processor architecture.


-----Original Message-----
From: bbc-micro-bounces+andy=top-banana.com@...
[mailto:bbc-micro-bounces+andy=top-banana.com@...] On
Behalf Of Rob
Sent: Friday, July 31, 2009 7:46 PM
To: Alex Taylor
Cc: BBC MailList
Subject: Re: [BBC-Micro] Units of memory, Was: Master Ethernet upgrade

On 31/07/2009, Alex Taylor <zeem.uk@...> wrote:
>
> I'm pretty sure that's not true. There's a small performance hit on
> HT-capable P4 processors in certain applications, due to the way the
> P4 works, but it's not because HT divides the CPU into two units of
> half the speed each.


Hmm... all I can say is that with HT on, I could see certain apps
taking 100% of one of the two "cpus" in task manager, 50% usage
overall, but with HT off, and only one "cpu" now showing in task
manager, it would take up nearer 75-80% ..  It's a couple of years
since I played with it, and some time since that machine was last
switched on, so I can't quite remember /which/ app it was I was trying
to speed up..

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