linux-kernel - Re: [RFC PATCH 0/2] Perf support to SDT markers

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Message-ID: <522768F8.2040307@linux.vnet.ibm.com>
Date:	Wed, 04 Sep 2013 22:38:08 +0530
From:	Hemant <hkshaw@...ux.vnet.ibm.com>
To:	Namhyung Kim <namhyung@...nel.org>
CC:	linux-kernel@...r.kernel.org, srikar@...ux.vnet.ibm.com,
	peterz@...radead.org, oleg@...hat.com, mingo@...hat.com,
	anton@...hat.com, systemtap@...rceware.org,
	masami.hiramatsu.pt@...achi.com
Subject: Re: [RFC PATCH 0/2] Perf support to SDT markers

On 09/04/2013 11:38 AM, Namhyung Kim wrote:
> Hi Hemant,
>
> On Tue, 03 Sep 2013 13:06:40 +0530, Hemant Kumar Shaw wrote:
>> This series adds support to perf to list and probe into the SDT markers.
>> The first patch implements listing of all the SDT markers present in
>> the ELFs (executables or libraries). The SDT markers are present in the
>> .note.stapsdt section of the elf. That section can be traversed to list
>> all the markers. Recognition of markers follows the SystemTap approach.
>>
>> The second patch will allow perf to probe into these markers. This is
>> done by writing the marker name and its offset into the
>> uprobe_events file in the tracing directory.
>> Then, perf tools can be used to analyze perf.data file.
> First, thanks for your work!
>
> In fact, I was working on the same topic of support SDT markers.  But I
> started it by adding support for accessing arguments in uprobes [1].

I was thinking of adding support to SDT markers' arguments too!! I 
already have your patches and did some basic testing. I will add support 
to arguments in the next iteration of my patches.

> The patchset is floating around the list for now but I hope it'll get
> merged soon.  I guess you want to have it too :).

Of course, that would be great!

>
> Anyway, it'd great if you add me to CC next time.

Sure, will do that.

Thanks
Hemant
>
> Thanks,
> Namhyung
>
>
> [1] http://thread.gmane.org/gmane.linux.kernel/1555044
>

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