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Date: Mon, 9 Dec 2002 19:36:49 +0000
From: Dave Jones <davej@codemonkey.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Intel P6 vs P7 system call performance
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On Mon, Dec 09, 2002 at 05:48:45PM +0000, Linus Torvalds wrote:

 > P4's really suck at system calls.  A 2.8GHz P4 does a simple system call
 > a lot _slower_ than a 500MHz PIII. 
 > 
 > The P4 has problems with some other things too, but the "int + iret"
 > instruction combination is absolutely the worst I've seen.  A 1.2GHz
 > Athlon will be 5-10 times faster than the fastest P4 on system call
 > overhead. 

Time to look into an alternative like SYSCALL perhaps ?

		Dave

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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