From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751838AbcGMMev (ORCPT ); Wed, 13 Jul 2016 08:34:51 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:52545 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751786AbcGMMem (ORCPT ); Wed, 13 Jul 2016 08:34:42 -0400 X-Greylist: delayed 405 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 Jul 2016 08:34:42 EDT X-Sasl-enc: /Z59Xm4j4caueqRtD7nAvL8kqtx9vbArJBF9Hr92PXgW 1468412871 Date: Wed, 13 Jul 2016 09:27:48 -0300 From: Henrique de Moraes Holschuh To: Ingo Molnar Cc: Peter Zijlstra , "H. Peter Anvin" , paulmck@linux.vnet.ibm.com, tglx@linutronix.de, mingo@elte.hu, ak@linux.intel.com, linux-kernel@vger.kernel.org Subject: Re: Odd performance results Message-ID: <20160713122748.GC20253@khazad-dum.debian.net> References: <20160710042639.GA4068@linux.vnet.ibm.com> <7DF218CD-22F6-4E46-A628-2138AEA3A161@infradead.org> <20160710144327.GX4650@linux.vnet.ibm.com> <20160712145551.GU30909@twins.programming.kicks-ass.net> <20160712150529.GN7094@linux.vnet.ibm.com> <27d2c710-479d-77a9-f2c6-875e9c2bc40f@zytor.com> <20160712185120.GX30909@twins.programming.kicks-ass.net> <20160713071817.GC13006@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160713071817.GC13006@gmail.com> X-GPG-Fingerprint1: 4096R/39CB4807 C467 A717 507B BAFE D3C1 6092 0BD9 E811 39CB 4807 User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 13 Jul 2016, Ingo Molnar wrote: > > The ordering Paul has, namely 0,1 for core0,smt{0,1} is not something > > I've ever seen on an Intel part. AMD otoh does enumerate their CMT stuff > > like what Paul has. > > That's more the natural 'direct' mapping from CPU internal topology to CPU id: > what's close to each other physically is close to each other in the CPU id space > as well. But does it correctly reflect the hardware? That seems to be the real question... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh