From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: Understanding perf mem -t load results Date: Sun, 15 Dec 2013 13:18:40 -0800 Message-ID: <877gb5vmmn.fsf@tassilo.jf.intel.com> References: <1776760155.10395562.1386857164818.JavaMail.root@insa-lyon.fr> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mga01.intel.com ([192.55.52.88]:6175 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750831Ab3LOVSl (ORCPT ); Sun, 15 Dec 2013 16:18:41 -0500 In-Reply-To: <1776760155.10395562.1386857164818.JavaMail.root@insa-lyon.fr> (Manuel Selva's message of "Thu, 12 Dec 2013 15:06:04 +0100 (CET)") Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Manuel Selva Cc: linux-perf-users@vger.kernel.org Manuel Selva writes: > > perf mem -t load rec -c 1 make -j18 With -c1 on such a frequent event you will not sample much, but just throttle a lot, as the PMI handler would use too much time. Your numbers are likely garbage. -Andi -- ak@linux.intel.com -- Speaking for myself only