Re: Intel P6 vs P7 system call performance

Linus Torvalds (torvalds@transmeta.com)
Tue, 17 Dec 2002 22:06:41 -0800 (PST)

On Wed, 18 Dec 2002, Brian Gerst wrote:
>
> How about this patch? Instead of making a per-cpu trampoline, write to
> the msr during each context switch.

I wanted to avoid slowing down the context switch, but I didn't actually
time how much the MSR write hurts you (it needs to be conditional, though,
I think).

Linus

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