Re: Intel P6 vs P7 system call performance

H. Peter Anvin (hpa@transmeta.com)
Tue, 17 Dec 2002 19:36:19 -0800


Ulrich Drepper wrote:
>
> That's good to know but not what I meant.
>
> I referred to syscall/sysret opcodes. They are broken in their own way
> (destroying ecx on kernel entry) but at least they preserve eip.
>

Destroying %ecx is a lot less destructive than destroying %eip and %esp...

-hpa

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