linux-kernel - Re: [PATCH v2 0/7] perf ctf: Convert comm, fork and exit events to CTF

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Message-ID: <20160624130814.GA18487@krava>
Date:	Fri, 24 Jun 2016 15:08:14 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	pi3orama <pi3orama@....com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Wang Nan <wangnan0@...wei.com>, linux-kernel@...r.kernel.org,
	lizefan@...wei.com
Subject: Re: [PATCH v2 0/7] perf ctf: Convert comm, fork and exit events to
 CTF

On Fri, Jun 24, 2016 at 08:43:56PM +0800, pi3orama wrote:
> 
> 
> 发自我的 iPhone
> 
> > 在 2016年6月24日，下午8:41，Arnaldo Carvalho de Melo <acme@...nel.org> 写道：
> > 
> > Em Fri, Jun 24, 2016 at 02:29:07PM +0200, Jiri Olsa escreveu:
> >> On Fri, Jun 24, 2016 at 11:22:05AM +0000, Wang Nan wrote:
> >>> After converting perf.data to CTF, we lost pid-tid-comm mapping. Which
> >>> makes inconvience. For example, in perf script output we know which
> >>> process issue an event like this:
> >>> 
> >>> compiz 19361 [001] 3275709.313929:  raw_syscalls:sys_exit: NR 7 = 0
> >>> 
> >>> After converting to CTF, we only get this:
> >>> 
> >>>  [3275709.313929985] (+0.110646118) raw_syscalls:sys_exit: { cpu_id = 1 }, { perf_ip = 0xFFFFFFFF8107B2E8, perf_tid = 19361, perf_pid = 19361, perf_id = 18920, perf_period = 1, common_type = 16, common_flags = 0, common_preempt_count = 1, common_pid = 19361, id = 7, ret = 0 }
> >>> 
> >>> Currently, if we want to find the name and parent of a process, we
> >>> have to collect 'sched:sched_switch' event.
> >>> 
> >>> This patch set adds a '--all' option to 'perf convert', converts comm,
> >>> fork and exit events to CTF output. CTF user now can track the mapping
> >>> by their own.
> >>> 
> >>> v1 -> v2: Report number of sample and non-sample events when finish.
> >>>          rename opts.non_sample to opts.all.
> >>> 
> >>> Wang Nan (7):
> >>>  perf ctf: Add value_set_string() helper
> >>>  perf ctf: Pass convert options through opts structure
> >>>  perf ctf: Add 'all' option
> >>>  perf ctf: Prepare collect non-sample events
> >>>  perf ctf: Generate comm event to CTF output
> >>>  perf ctf: Add '--all' option for 'perf data convert'
> >>>  perf ctf: Generate fork and exit events to CTF output
> >> 
> >> I can't compile unless I can include config.h
> > 
> > Waiting for this fix to proceed, but it seems we don't have this covered
> > in 'build-test', right? ;-)
> > 
> 
> CTF support is off by default. When can we
> turn it on like other options?

we switched it off because the latest version we needed
wasn't part of main distros.. it might have changed now

jirka