lkml.org 
[lkml]   [2013]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] SDT markers listing by perf
(2013/09/04 15:42), Namhyung Kim wrote:
> On Tue, 03 Sep 2013 13:06:55 +0530, Hemant Kumar wrote:
>
> [SNIP]
>
>> diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
>> index e8a66f9..3d8dcdf 100644
>> --- a/tools/perf/builtin-probe.c
>> +++ b/tools/perf/builtin-probe.c
>> @@ -55,6 +55,7 @@ static struct {
>> bool show_funcs;
>> bool mod_events;
>> bool uprobes;
>> + bool sdt;
>> int nevents;
>> struct perf_probe_event events[MAX_PROBES];
>> struct strlist *dellist;
>> @@ -325,6 +326,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
>> opt_set_filter),
>> OPT_CALLBACK('x', "exec", NULL, "executable|path",
>> "target executable name or path", opt_set_target),
>> + OPT_BOOLEAN('S', "sdt", &params.sdt,
>> + "Show and probe on the SDT markers"),
>
> You need to add it to Documentation/perf-probe.txt too. In addition if
> the --sdt option is only able to work with libelf, it should be wrapped
> into the #ifdef LIBELF_SUPPORT pair.
>
> And I'm not sure that it's a good idea to have two behavior on a single
> option (S) - show and probe (add). Maybe it can be separated into two
> or the S option can be used as a flag with existing --list and --add
> option?
>

Good catch! :)
No, that is really bad idea. All probes must be added by "--add" action.
So we need a new probe syntax for specifying sdt marker.

How about the below syntax?

[EVENT=]%PROVIDER:MARKER [ARG ...]

Of course, this will require to list up all markers with "%" prefix for
continuity.

And since --list option is to list up all existing(defined) probe events,
I think --markers (as like as --funcs) is better for listing it up.

Thank you!

--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com




\
 
 \ /
  Last update: 2013-09-04 11:01    [W:0.136 / U:0.904 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site