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Subject: Re: Intel P6 vs P7 system call performance
From: Terje Eggestad <terje.eggestad@scali.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       Dave Jones <davej@codemonkey.org.uk>
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On ons, 2002-12-11 at 19:50, H. Peter Anvin wrote:
> Terje Eggestad wrote:
> 
> > 
> > PS:  rdtsc on P4 is also painfully slow!!!
> > 
> 
> Now that's just braindead...
> 

It takes about 11 cycles on athlon, 34 on PII, and a whooping 84 on P4.

For a simple op like that, even 11 is a lot... Really makes you wonder.
 

> 	-hpa

TJ

-- 
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Terje Eggestad                  mailto:terje.eggestad@scali.no
Scali Scalable Linux Systems    http://www.scali.com

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