Re: Intel P6 vs P7 system call performance

Benjamin LaHaise
2002-12-17T21:42:36Z

On Tue, Dec 17, 2002 at 01:36:53PM -0800, H. Peter Anvin wrote:
> Benjamin LaHaise wrote:
> >
> > The stubs I used for the vsyscall bits just did an absolute jump to
> > the vsyscall page, which would then do a ret to the original calling
> > userspace code (since that provided library symbols for the user to
> > bind against).
> >
>
> What kind of "absolute jumps" were this?

It was a far jump (ljmp $__USER_CS, ).

-ben
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