From: Michael Schnell <mschnell@lumino.de>
To: linux-kernel@vger.kernel.org
Subject: Re: [RFC] Userspace RCU: (ab)using futexes to save cpu cycles and energy
Date: Mon, 28 Sep 2009 12:58:52 +0200 [thread overview]
Message-ID: <4AC096EC.2090603@lumino.de> (raw)
In-Reply-To: <4AC06187.2050806@lumino.de>
Michael Schnell wrote:
> 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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next prev parent reply other threads:[~2009-09-28 10:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-23 17:48 [RFC] Userspace RCU: (ab)using futexes to save cpu cycles and energy Mathieu Desnoyers
2009-09-23 18:04 ` Chris Friesen
2009-09-23 19:03 ` Mathieu Desnoyers
2009-09-23 22:32 ` Mathieu Desnoyers
2009-09-23 23:12 ` Chris Friesen
2009-09-23 23:28 ` Mathieu Desnoyers
2009-09-26 7:05 ` Mathieu Desnoyers
2009-09-28 7:11 ` Michael Schnell
2009-09-28 10:58 ` Michael Schnell [this message]
2009-09-28 11:01 ` Michael Schnell
2009-10-01 14:40 ` Paul E. McKenney
2009-10-04 14:37 ` Mathieu Desnoyers
2009-10-04 20:36 ` Paul E. McKenney
2009-10-04 21:12 ` Mathieu Desnoyers
[not found] ` <4AC99D55.8000102@lumino.de>
[not found] ` <20091005125533.GA1857@Krystal>
2009-10-05 13:22 ` Mathieu Desnoyers
2009-10-05 22:21 ` Mathieu Desnoyers
2009-10-07 7:22 ` Michael Schnell
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