Re: Intel P6 vs P7 system call performance

From: Benjamin LaHaise (bcrl@redhat.com)
Date: Tue Dec 17 2002 - 16:50:33 EST

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,<address>).

                -ben 

-- 
"Do you seek knowledge in time travel?"
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Mon Dec 23 2002 - 22:00:18 EST