Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966906Ab3HIKXc (ORCPT ); Fri, 9 Aug 2013 06:23:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:63280 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966425Ab3HIKXa (ORCPT ); Fri, 9 Aug 2013 06:23:30 -0400 Date: Fri, 9 Aug 2013 12:23:06 +0200 From: Jiri Olsa To: Namhyung Kim Cc: Arnaldo Carvalho de Melo , Peter Zijlstra , Paul Mackerras , Ingo Molnar , Namhyung Kim , LKML , Steven Rostedt , Frederic Weisbecker , David Ahern , Stephane Eranian , Jeremy Eder Subject: Re: [PATCHSET 00/17] perf tools: Introduce new 'ftrace' command (v4) Message-ID: <20130809102306.GA1045@krava.brq.redhat.com> References: <1375175954-798-1-git-send-email-namhyung@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1375175954-798-1-git-send-email-namhyung@kernel.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1967 Lines: 53 On Tue, Jul 30, 2013 at 06:18:57PM +0900, Namhyung Kim wrote: > This patchset implements a front-end tool for kernel's ftrace. It > uses function_graph tracer by default and normal function tracer is > also supported. (Of course you need to enable those tracers in your > kernel first.) > > v4 changes: > * use pid instead of tid for -p option (David) > * not to poll() for reading ftrace pipes (Jiri) > * rename to create_perf_header() (Jiri) > * canonicalize directory name (Jiri) > * show more info when -D option was given (Jiri) > * update documentation (Jiri) > * and few more bug fixes > > I pushed it out to 'perf/ftrace-v4' branch on my tree at: > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git got following for record: [root@dhcp-26-214 perf]# ./perf ftrace record kill usage: kill [ -s signal | -p ] [ -a ] pid ... kill -l [ signal ] recorder failed for some reason on cpu0 recorder failed for some reason on cpu1 afterwards 'perf ftrace report' gets stuck with 2 processes: [jolsa@dhcp-26-214 perf]$ sudo pstack 1470 #0 0x00007f23ab61e997 in munmap () from /lib64/libc.so.6 #1 0x000000000047b5f7 in __perf_session__process_events () #2 0x000000000043f230 in do_ftrace_report () #3 0x0000000000440555 in cmd_ftrace () #4 0x000000000041aad3 in run_builtin () #5 0x000000000041a379 in main () [jolsa@dhcp-26-214 perf]$ sudo pstack 1471 #0 0x00007f23ab61b623 in __select_nocancel () from /lib64/libc.so.6 #1 0x000000000046a337 in pager_preexec () #2 0x000000000045f5a3 in start_command () #3 0x000000000046a4ab in setup_pager () #4 0x0000000000440535 in cmd_ftrace () #5 0x000000000041aad3 in run_builtin () #6 0x000000000041a379 in main () 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/