From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arun Sharma Subject: Re: Using a new perf tool against an older kernel Date: Thu, 23 Jun 2011 17:43:28 -0700 Message-ID: <4E03DDB0.3050502@fb.com> References: <4E026123.4060208@fb.com> <4E034C2C.30509@gmail.com> <4E03968A.5010008@fb.com> <20110624001100.GD8058@somewhere.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110624001100.GD8058@somewhere.redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: Frederic Weisbecker Cc: David Ahern , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-perf-users.vger.kernel.org On 6/23/11 5:11 PM, Frederic Weisbecker wrote: > > I'm confused, you first said it happens with new tools on older kernel. > > Can you tell us which combination of kernel/user raises the error? and > which error. > perf-3.0 + 2.6.38 perf record -agR gives: Can't find id 9's machine Found 1 unknown events! perf-3.0 + 2.6.32 perf record -ag perf script samples have bogus timestamps perf-3.0 + 2.6.32 perf record -agR perf script error: Samples do not contain timestamps perf-3.0 + any kernel perf record -agT perf script is happy everywhere. Thanks! -Arun