From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: cboxes on NehalemEX Date: Wed, 28 Nov 2012 12:33:22 -0800 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga09.intel.com ([134.134.136.24]:14794 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932085Ab2K1UdZ (ORCPT ); Wed, 28 Nov 2012 15:33:25 -0500 In-Reply-To: (Animesh K. Trivedi1's message of "Fri, 16 Nov 2012 15:46:36 +0100") Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Animesh K Trivedi1 Cc: linux-perf-users@vger.kernel.org, Bernard Metzler Animesh K Trivedi1 writes: > Hi all, > > I'm testing/using uncore support on a dual socket NehalemEX (Xeon E7520) > box on 3.7-rc1. > It shows me only 4 CBOXes under devices. Although the document (Uncore > programming > for 7500) says that there should be 8 CBOXes. Am I missing something? The number of CBOXes depends on the number of CPU cores in the socket. Each core has a CBOX. You would only see 8 on a 8 core CPU. > get a global view of LLC behaviour shouldn't I have to sum up the count of > events from all > physical processor's CBOXes. Yes. Each BOX has its own counters. -Andi -- ak@linux.intel.com -- Speaking for myself only