Ingo Molnar wrote:
> that alone is already ~100-200 cycles overhead, it essentially doubles 
> the null syscall overhead. It matters at millions of syscalls per second 
> workloads, 100 cycles overhead at 1 million syscalls a second means 5% 
> performance difference at 2GHz.

Plus, x86-64 uses only syscall which doesn't have the opportunity to be
intercepted in ring 1, right?  That's the much more important target
going forward.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖