From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: perf stat: Doubt about stall cycle support Date: Wed, 21 Mar 2012 20:30:35 -0600 Message-ID: <4F6A8ECB.5090609@gmail.com> References: <4F69E9C4.8060108@gmail.com> <4F6A00BC.8070705@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pz0-f46.google.com ([209.85.210.46]:65177 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757072Ab2CVCal (ORCPT ); Wed, 21 Mar 2012 22:30:41 -0400 Received: by dajr28 with SMTP id r28so2425114daj.19 for ; Wed, 21 Mar 2012 19:30:40 -0700 (PDT) In-Reply-To: Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Yipeng Huang Cc: linux-perf-users@vger.kernel.org On 3/21/12 6:43 PM, Yipeng Huang wrote: > Since I am on a much newer kernel, could it be the case that reading stall > cycles is not supported by my hardware rather than by the kernel? Sandy Bridge and Westmere support should be in 3.0. Are you sure your processor supports it? David