From: Roland Dreier <rdreier@cisco.com>
To: Darren Hart <dvhltc@us.ibm.com>
Cc: "lkml\, " <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <peterz@infradead.org>,
Gregory Haskins <ghaskins@novell.com>,
Sven-Thorsten Dietrich <sdietrich@novell.com>,
Peter Morreale <pmorreale@novell.com>,
Chris Wright <chrisw@sous-sol.org>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: RFC: Ideal Adaptive Spinning Conditions
Date: Wed, 31 Mar 2010 16:35:53 -0700 [thread overview]
Message-ID: <adaeij0gj3a.fsf@roland-alpha.cisco.com> (raw)
In-Reply-To: <4BB3D90C.3030108@us.ibm.com> (Darren Hart's message of "Wed, 31 Mar 2010 16:21:48 -0700")
> I'm looking at some adaptive spinning with futexes as a way to help
> reduce the dependence on sched_yield() to implement userspace
> spinlocks. Chris, I included you in the CC after reading your comments
> regarding sched_yield() at kernel summit and I thought you might be
> interested.
I think you may have the wrong Chris. Chris Wright wasn't at the most
recent kernel summit and I do have a vague recollection of Chris Mason
mentioning that Oracle developers found that sched_yield() performed
better than futexes + kernel scheduling.
--
Roland Dreier <rolandd@cisco.com> || For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/index.html
next prev parent reply other threads:[~2010-03-31 23:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-31 23:21 RFC: Ideal Adaptive Spinning Conditions Darren Hart
2010-03-31 23:35 ` Roland Dreier [this message]
2010-04-01 2:03 ` Darren Hart
2010-04-01 17:02 ` Chris Wright
2010-03-31 23:38 ` Steven Rostedt
2010-04-01 0:17 ` Peter W. Morreale
2010-04-01 2:25 ` Darren Hart
2010-04-03 18:00 ` john cooper
2010-04-05 14:06 ` Darren Hart
2010-04-03 17:51 ` john cooper
2010-04-01 2:13 ` Darren Hart
2010-04-01 2:25 ` Steven Rostedt
2010-04-01 5:15 ` Darren Hart
2010-04-01 12:46 ` Gregory Haskins
2010-04-04 1:50 ` Rik van Riel
2010-04-04 15:06 ` Peter W. Morreale
2010-04-05 14:10 ` Darren Hart
2010-04-01 2:10 ` Darren Hart
2010-04-01 14:04 ` Chris Mason
2010-04-01 14:20 ` Avi Kivity
2010-04-01 15:54 ` Darren Hart
2010-04-01 16:10 ` Avi Kivity
2010-04-01 17:10 ` Darren Hart
2010-04-01 17:15 ` Avi Kivity
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