From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Freehill Subject: perf stat -e cycles -p sleep 10 Date: Mon, 26 Nov 2012 22:50:13 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:56972 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757346Ab2KZWyy (ORCPT ); Mon, 26 Nov 2012 17:54:54 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Td7Zv-0008Dk-CJ for linux-perf-users@vger.kernel.org; Mon, 26 Nov 2012 23:55:03 +0100 Received: from gate-tx3.freescale.com ([192.88.168.1]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 26 Nov 2012 23:55:03 +0100 Received: from cfreehill by gate-tx3.freescale.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 26 Nov 2012 23:55:03 +0100 Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org Hi, Apologies if the answer to this is someplace I have not looked. I've searched this list and other sites/FAQ's. I've noticed that command listed in the subject line always yields cycles unless the target process is suspended. I have noticed this with a few different distributions. Is the fact that the target process has to be suspended at least once a known design limitation or would it be considered a bug? Thank you for your help. Chris