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

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Date:	Fri, 24 Jun 2016 20:33:27 +0800
From:	pi3orama <pi3orama@....com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Wang Nan <wangnan0@...wei.com>, acme@...nel.org,
	linux-kernel@...r.kernel.org, lizefan@...wei.com
Subject: Re: [PATCH v2 0/7] perf ctf: Convert comm, fork and exit events to CTF



发自我的 iPhone

> 在 2016年6月24日，下午8:29，Jiri Olsa <jolsa@...hat.com> 写道：
> 
>> 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
> 
> [jolsa@...va perf]$ make LIBBABELTRACE_DIR=/opt/libbabeltrace/ LIBBABELTRACE=1
>  BUILD:   Doing 'make -j4' parallel build
>  CC       util/data-convert-bt.o
> util/data-convert-bt.c: In function ‘convert__config’:
> util/data-convert-bt.c:1299:19: error: implicit declaration of function ‘perf_config_u64’ [-Werror=implicit-function-declaration]
>   c->queue_size = perf_config_u64(var, value);
>                   ^
> util/data-convert-bt.c:1299:3: error: nested extern declaration of ‘perf_config_u64’ [-Werror=nested-externs]
>   c->queue_size = perf_config_u64(var, value);
>   ^
> util/data-convert-bt.c: In function ‘bt_convert__perf2ctf’:
> util/data-convert-bt.c:1332:2: error: implicit declaration of function ‘perf_config’ [-Werror=implicit-function-declaration]
>  perf_config(convert__config, &c);
>  ^
> util/data-convert-bt.c:1332:2: error: nested extern declaration of ‘perf_config’ [-Werror=nested-externs]
> cc1: all warnings being treated as errors
> 

Strange.

The error message seems unrelated to my
patch, right?

Thank you.

> 
> your compiler's not that strict I guess ;-)
> I'll post it shortly
> 
> jirka
> 
> ---
> diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
> index 79082782e7d2..4b68e7b9ee0c 100644
> --- a/tools/perf/util/data-convert-bt.c
> +++ b/tools/perf/util/data-convert-bt.c
> @@ -26,6 +26,7 @@
> #include "evlist.h"
> #include "evsel.h"
> #include "machine.h"
> +#include "config.h"
> 
> #define pr_N(n, fmt, ...) \
>    eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)