Re: Intel P6 vs P7 system call performance

From: bart@etpmod.phys.tue.nl
Date: Thu Dec 19 2002 - 09:57:06 EST

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On 19 Dec, billyrose@billyrose.net wrote:
> long_call:
> pushl $0xfffff000
> ret
>

A ret(urn) to an address that wasn't put on the stack by a call
severly confuses the branch prediction on many processors.

-- 
Bart Hartgers - TUE Eindhoven 
http://plasimo.phys.tue.nl/bart/contact.html
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