Messages in this thread |  | | | Date | Mon, 28 Sep 2009 09:11:03 +0200 | | From | Michael Schnell <> | | Subject | Re: [RFC] Userspace RCU: (ab)using futexes to save cpu cycles and energy |
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Mathieu Desnoyers wrote: > > The mutex code (and usual futex users) use futex to implement mutual > exclusion. My goal is to send a wakeup signal to a thread waiting for > work to perform when adding such work. But without any mutual exclusion.
Why is that different ?
if you use a normal FUTEX like pthread_mutex_...() and have the thread block right at the start (by blocking the *UTEX before creating the thread). Now you can wake the thread by unblocking the *UTEX.
-Michael
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