Re: [RFC] Userspace RCU: (ab)using futexes to save cpu cycles and energy

Michael Schnell
2009-09-28T11:01:55Z

Michael Schnell wrote:
> Why is that different ?

It might be that (different from a sema), a FUTEX can only be unlocked
by the process that locked it.

But then why should FUTEX offer advantages over sema, if in that
application the FUTEX is supposed to block with a system call, anyway ?

-Michael