Re: Intel P6 vs P7 system call performance

H. Peter Anvin (hpa@zytor.com)
Mon, 16 Dec 2002 11:55:42 -0800

Pavel Machek wrote:
>
>>The vsyscall stuff costs you on every syscall. It's nice for
>
>
> Well, the cost is basically one call. That's not *that* big cost.
>

You absolutely, positively *need* the call anyway. SYSENTER trashes EIP.

-hpa

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