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Subject: Re: OT: P4- 3 GHz with hyper-threading

Author: Robert Hyatt

Date: 07:53:58 10/30/02

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On October 30, 2002 at 06:59:21, Terje Vagle wrote:

>Hi all,
>
>The new cpu from intel will have a new function called
>hyper-threading.
>
>This will make the operating system able to recognize the cpu as if it was
>2 cpu's.
>
>Could the programs with smp-support make use of this?
>
>Regards,
>
>Terje Vagle


Yes, but it is going to cause some problems.  You don't _really_ have two cpus.
You
have a single cpu executing two threads, and when one thread "blocks" waiting on
a
memory access or anything else (FP result) then the other thread will run.

Spinlocks will wreck this however...

• Re: OT: P4- 3 GHz with hyper-threading Eugene Nalimov 09:33:00 10/30/02
  • Re: OT: P4- 3 GHz with hyper-threading Robert Hyatt 10:10:59 10/30/02
    • Re: OT: P4- 3 GHz with hyper-threading Eugene Nalimov 11:13:10 10/30/02
      • Re: OT: P4- 3 GHz with hyper-threading Robert Hyatt 11:47:49 10/30/02

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