linux-kernel - Re: [RFC][PATCH] perf tools: unify perf_event

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Date:	Thu, 2 Apr 2015 10:12:50 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiri Olsa <jolsa@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <john.stultz@...aro.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH] perf tools: unify perf_event_attr printing


* Peter Zijlstra <peterz@...radead.org> wrote:

> With some feedback from Jolsa, who showed me how to trigger the actual
> outputs.
> 
> ---
> 
> Subject: perf, tools: Merge all perf_event_attr print functions
> From: Peter Zijlstra <peterz@...radead.org>
> Date: Tue Mar 31 13:01:54 CEST 2015
> 
> Currently there's 3 (that I found) different and incomplete
> implementations of printing perf_event_attr.
> 
> This is quite silly. Merge the lot.
> 
> While this patch does not retain the exact form all printing that I
> found is debug output and thus it should not be critical.
> 
> Also, I cannot find a single print_event_desc() caller.
> 
> Pre:
> 
> $ perf record -vv -e cycles -- sleep 1
> ------------------------------------------------------------
> perf_event_attr:
>   type                0
>   size                104
>   config              0
>   sample_period       4000
>   sample_freq         4000
>   sample_type         0x107
>   read_format         0
>   disabled            1    inherit             1
>   pinned              0    exclusive           0
>   exclude_user        0    exclude_kernel      0
>   exclude_hv          0    exclude_idle        0
>   mmap                1    comm                1
>   mmap2               1    comm_exec           1
>   freq                1    inherit_stat        0
>   enable_on_exec      1    task                1
>   watermark           0    precise_ip          0
>   mmap_data           0    sample_id_all       1
>   exclude_host        0    exclude_guest       1
>   excl.callchain_kern 0    excl.callchain_user 0
>   wakeup_events       0
>   wakeup_watermark    0
>   bp_type             0
>   bp_addr             0
>   config1             0
>   bp_len              0
>   config2             0
>   branch_sample_type  0
>   sample_regs_user    0
>   sample_stack_user   0
>   sample_regs_intr    0
> ------------------------------------------------------------
> 
> $ perf evlist  -vv
> cycles: sample_freq=4000, size: 104, sample_type: IP|TID|TIME|PERIOD,
> disabled: 1, inherit: 1, mmap: 1, mmap2: 1, comm: 1, comm_exec: 1,
> freq: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest:
> 1
> 
> Post:
> 
> $ ./perf record -vv -e cycles -- sleep 1 
> ------------------------------------------------------------
> perf_event_attr:
>   size                             112
>   { sample_period, sample_freq }   4000
>   sample_type                      IP|TID|TIME|PERIOD
>   disabled                         1
>   inherit                          1
>   mmap                             1
>   comm                             1
>   freq                             1
>   enable_on_exec                   1
>   task                             1
>   sample_id_all                    1
>   exclude_guest                    1
>   mmap2                            1
>   comm_exec                        1
> ------------------------------------------------------------
> 
> $ ./perf evlist  -vv
> cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type:
> IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq:
> 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1,
> mmap2: 1, comm_exec: 1
> 
> Cc: acme@...hat.com
> Cc: jolsa@...hat.com
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---
>  tools/perf/util/Build          |    1 
>  tools/perf/util/evsel.c        |  181 ++++++-----------------------------------
>  tools/perf/util/header.c       |   34 ++-----
>  tools/perf/util/print_attr.h   |   69 +++++++++++++++
>  tools/perf/util/print_helper.c |   52 +++++++++++
>  tools/perf/util/print_helper.h |    7 +
>  6 files changed, 170 insertions(+), 174 deletions(-)

Acked-by: Ingo Molnar <mingo@...nel.org>

Thanks,

	Ingo
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