linux-kernel - Re: [PATCH v2 11/13] perf header: change FEAT

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Date:   Sun, 4 Jun 2017 19:13:05 -0700
From:   David Carrillo-Cisneros <davidcc@...gle.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, Simon Que <sque@...omium.org>,
        Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>,
        He Kuang <hekuang@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        David Ahern <dsa@...ulusnetworks.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v2 11/13] perf header: change FEAT_OP* macros

On Thu, May 25, 2017 at 1:08 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> On Tue, May 23, 2017 at 12:48:51AM -0700, David Carrillo-Cisneros wrote:
>> There are three FEAT_OP* macros:
>>   - FEAT_OPA: for features without process record.
>>   - FEAT_OPP: for features with process record.
>>   - FEAT_OPF: like FEAT_OPP but to show only if show_full_info flags
>>     is set.
>>
>> To add pipe-mode headers we need to specify whether a feature generates a
>> corresponding sample record. This is an extra variation to the existing
>
> nit, the sample word here is confusing, it's an aux event

Will change.

>
>> macros. To simplify, redefine macros instead so that:
>>   - show_full_info is specified as an argument (to remove the
>>   FEAT_OPF variation) and,
>>   - it always sets "process" handler (to remove the FEAT_OPA variation).
>>   Individual process handlers can be NULLed individually.
>>
>> This allows to define two variations only:
>>   - FEAT_OPR: has sample record.
>>   - FEAT_OPN: doesn't has sample record.
>>
>> Signed-off-by: David Carrillo-Cisneros <davidcc@...gle.com>
>> ---
>>  tools/perf/util/header.c | 72 +++++++++++++++++++++++++++++-------------------
>>  1 file changed, 44 insertions(+), 28 deletions(-)
>>
>> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
>> index b7704b30ed52..7aa84a02b9bd 100644
>> --- a/tools/perf/util/header.c
>> +++ b/tools/perf/util/header.c
>> @@ -11,6 +11,7 @@
>>  #include <linux/list.h>
>>  #include <linux/kernel.h>
>>  #include <linux/bitops.h>
>> +#include <linux/stringify.h>
>>  #include <sys/stat.h>
>>  #include <sys/types.h>
>>  #include <sys/utsname.h>
>> @@ -2106,42 +2107,57 @@ struct feature_ops {
>>       int (*process)(struct feat_fd *fd, void *data);
>>       const char *name;
>>       bool full_only;
>> +     bool has_record;
>
> 'synthesize' might be better choice

Yeah, it's better. Will change.

>
> jirka