linux-kernel - Re: [PATCH 5/6] perf tools: Add dynamic sort key for tracepoint events

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Date:	Tue, 15 Dec 2015 09:53:09 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 5/6] perf tools: Add dynamic sort key for tracepoint
 events

On Tue, Dec 15, 2015 at 12:46:12AM +0900, Namhyung Kim wrote:

SNIP

> 
>   $ perf report -s comm,sched:sched_switch.next_pid,sched:sched_switch.next_comm --stdio
>   ...
>   # Overhead  Command            next_pid         next_comm
>   # ........  ...............  ..........  ................
>   #
>       20.86%  swapper               17773   transmission-gt
>        9.64%  transmission-gt           0         swapper/0
>        9.16%  transmission-gt           0         swapper/2
>        5.25%  swapper                 109      kworker/0:1H
>        5.21%  kworker/0:1H              0         swapper/0
>        2.14%  netctl-auto               0         swapper/2
>        1.98%  netctl-auto               0         swapper/0
>        1.98%  swapper                6524            Xephyr
>        1.98%  swapper               27478       netctl-auto
>        1.78%  transmission-gt           0         swapper/3
>        1.53%  Xephyr                    0         swapper/0
>        1.29%  netctl-auto               0         swapper/1
>        1.29%  swapper               27476       netctl-auto
>        1.21%  netctl-auto               0         swapper/3
>        1.17%  swapper                 233    irq/33-iwlwifi
> 
> Note that pid 0 exists for each cpu so have comm of 'swapper/N'.

could we also add by default all tracepoint fields in case none
is specified and the event to display is tracepoint?

also an extra field that would hold/show the 'print fmt' display ? 

thanks,
jirka
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