From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751565AbdBBNky (ORCPT ); Thu, 2 Feb 2017 08:40:54 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:35222 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751027AbdBBNkw (ORCPT ); Thu, 2 Feb 2017 08:40:52 -0500 Date: Thu, 2 Feb 2017 14:40:48 +0100 From: Ingo Molnar To: Ravi Bangoria Cc: acme@redhat.com, alexis.berlemont@gmail.com, linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, alexander.shishkin@linux.intel.com, mpe@ellerman.id.au, naveen.n.rao@linux.vnet.ibm.com, mhiramat@kernel.org, maddy@linux.vnet.ibm.com Subject: Re: [PATCH 1/5] perf/sdt: Show proper hint Message-ID: <20170202134048.GB3393@gmail.com> References: <20161214000732.1710-1-alexis.berlemont@gmail.com> <20170202111143.14319-1-ravi.bangoria@linux.vnet.ibm.com> <20170202111143.14319-2-ravi.bangoria@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170202111143.14319-2-ravi.bangoria@linux.vnet.ibm.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Ravi Bangoria wrote: > After patch: > $ perf record -e sdt_glib:main__after_check > event syntax error: 'sdt_glib:idle__add' > \___ unknown tracepoint > > Error: File /sys/kernel/debug/tracing/events/sdt_glib/idle__add ... > Hint: SDT event has to be probed before recording it. So what is the command line option to 'probe' an SDT event? Could you give an example that would make the above command work? Thanks, Ingo