From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: Understanding timestamps in perf.data Date: Wed, 2 Sep 2015 11:00:12 -0600 Message-ID: <55E72B1C.7070108@gmail.com> References: <55E6C120.3030504@kit.edu> <55E6FCF9.60403@gmail.com> <55E71351.8010507@kit.edu> <55E72762.6030209@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-io0-f178.google.com ([209.85.223.178]:36236 "EHLO mail-io0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755631AbbIBRAN (ORCPT ); Wed, 2 Sep 2015 13:00:13 -0400 Received: by ioii196 with SMTP id i196so27389479ioi.3 for ; Wed, 02 Sep 2015 10:00:12 -0700 (PDT) In-Reply-To: Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Vince Weaver Cc: Dennis Gnad , linux-perf-users@vger.kernel.org On 9/2/15 11:00 AM, Vince Weaver wrote: > On Wed, 2 Sep 2015, David Ahern wrote: >> The counter values are not relevant for profiling. They are programmed to >> rollover and generate an NMI which causes the sample to be taken. > > They might not be relevant for profiling, but some people use the perf > counters for other tasks. Dennis was asking about profiling.