From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Rostedt Subject: Re: [RFC PATCH RT] rwsem: The return of multi-reader PI rwsems Date: Thu, 10 Apr 2014 10:32:55 -0400 Message-ID: <20140410103255.2eba08c6@gandalf.local.home> References: <20140409151922.5fa5d999@gandalf.local.home> <1397139510.5137.92.camel@marge.simpson.net> <1397140123.5137.99.camel@marge.simpson.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: LKML , linux-rt-users , "Paul E. McKenney" , Paul Gortmaker , Thomas Gleixner , Sebastian Andrzej Siewior , Clark Williams , Frederic Weisbecker , Peter Zijlstra , Ingo Molnar To: Mike Galbraith Return-path: In-Reply-To: <1397140123.5137.99.camel@marge.simpson.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On Thu, 10 Apr 2014 16:28:43 +0200 Mike Galbraith wrote: > On Thu, 2014-04-10 at 16:18 +0200, Mike Galbraith wrote: > > On Wed, 2014-04-09 at 15:19 -0400, Steven Rostedt wrote: > > > > > If you have any benchmark on large machines I would be very happy if > > > you could test this patch against the unpatched version of -rt. > > > > Too bad I don't have (and know how to use) specjbb. > > > > I dug up old vmark, thinking I'd be able to get some halfway useful > > relative numbers from it, but that was a waste of a day. The thing > > performs so badly on 40 core box that rt _beats_ nopreempt, and after 2 > > nodes, you're going backward. 40 Westmere EX cores does a whopping ~2.5 > > * dinky old Q6600 box throughput. > > P.S. What I didn't see was any sign of a delta patched/unpatched.. > which may mean nothing at all :-/ Actually that at least means it didn't cause any regressions for you. -- Steve