Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753556AbbHUODP (ORCPT ); Fri, 21 Aug 2015 10:03:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36874 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751699AbbHUODN (ORCPT ); Fri, 21 Aug 2015 10:03:13 -0400 Date: Fri, 21 Aug 2015 16:03:10 +0200 From: Jiri Olsa To: Arnaldo Carvalho dn Melo Cc: Jiri Olsa , Dean Nelson , a.p.zijlstra@chello.org, mingo@redhat.com, rostedt@goodmis.org, namhyung@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] tools lib traceevent: add checks for returned EVENT_ERROR type Message-ID: <20150821140310.GE27650@krava.brq.redhat.com> References: <20150820151632.13927.13791.email-sent-by-dnelson@teal> <20150821133441.GE3154@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150821133441.GE3154@kernel.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1422 Lines: 34 On Fri, Aug 21, 2015 at 10:34:41AM -0300, Arnaldo Carvalho dn Melo wrote: > Em Thu, Aug 20, 2015 at 11:16:32AM -0400, Dean Nelson escreveu: > > Running the following perf-stat command on an arm64 system produces the > > following result... > > > [root@aarch64 ~]# perf stat -e kmem:mm_page_alloc -a sleep 1 > > Warning: [kmem:mm_page_alloc] function sizeof not defined > > Warning: Error: expected type 4 but read 0 > > Segmentation fault > > [root@aarch64 ~]# > > Jiri, while testing this I noticed that when running as !root I get: > > $ perf stat -e kmem:mm_page_alloc -a sleep 1 > event syntax error: 'kmem:mm_page_alloc' > \___ unknown tracepoint > Run 'perf list' for a list of valid events yep, we need to hook it in.. I recall we discussed this already ;-) so would something like this be ok: $ perf stat -e kmem:mm_page_alloc -a sleep 1 event syntax error: 'kmem:mm_page_alloc' \___ No permissions to read /sys/kernel/debug/tracing/events/raw_syscalls/sys_(enter|exit) Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug' Run 'perf list' for a list of valid events jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/