From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: bisected: futex regression >= 3.14 - was - Slowdown due to threads bouncing between HT cores
Date: Sun, 26 Oct 2014 11:39:18 +0100 [thread overview]
Message-ID: <20141026103918.GA5259@sesse.net> (raw)
In-Reply-To: <1414168721.5308.3.camel@marge.simpson.net>
On Fri, Oct 24, 2014 at 06:38:41PM +0200, Mike Galbraith wrote:
>>> Whew, good, futex.c is hard. Heads up chess guys <punt>.
>> I wonder whether the barrier fix which got into 3.17 late fixes that
>> issue as well.
> Yes, it did.
This is only about the lockup, right, not that the threads bounce around a
lot and make things slower?
/* Steinar */
--
Homepage: http://www.sesse.net/
next prev parent reply other threads:[~2014-10-26 10:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-03 19:44 Slowdown due to threads bouncing between HT cores Steinar H. Gunderson
2014-10-03 21:11 ` Marc Burkhardt
2014-10-03 21:14 ` Steinar H. Gunderson
2014-10-04 9:22 ` Marc Burkhardt
2014-10-04 13:41 ` Andi Kleen
2014-10-04 14:12 ` Steinar H. Gunderson
2014-10-04 14:50 ` Chuck Ebbert
2014-10-05 11:19 ` Steinar H. Gunderson
2014-10-08 15:37 ` bisected: futex regression >= 3.14 - was - " Mike Galbraith
2014-10-08 16:14 ` Thomas Gleixner
2014-10-08 16:45 ` Steinar H. Gunderson
2014-10-08 17:52 ` Mike Galbraith
2014-10-08 16:23 ` Steinar H. Gunderson
2014-10-08 17:04 ` Linus Torvalds
2014-10-08 17:05 ` Steinar H. Gunderson
2014-10-08 17:59 ` Mike Galbraith
2014-10-24 15:25 ` Thomas Gleixner
2014-10-24 16:38 ` Mike Galbraith
2014-10-26 10:39 ` Steinar H. Gunderson [this message]
2014-10-26 13:16 ` Mike Galbraith
2014-10-26 13:58 ` Mike Galbraith
2014-10-26 14:11 ` Steinar H. Gunderson
2014-10-26 14:41 ` Mike Galbraith
2014-10-27 10:05 ` Mike Galbraith
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