linux-kernel - Re: [RFC PATCH 0/2] libtraceevent/perf: Add support for trace-cmd plugins

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Message-ID: <4FDF3C9B.5060502@gmail.com>
Date:	Mon, 18 Jun 2012 08:35:07 -0600
From:	David Ahern <dsahern@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Namhyung Kim <namhyung@...nel.org>, acme@...stprotocols.net,
	linux-kernel@...r.kernel.org, weisbec@...il.com,
	namhyung.kim@....com, mingo@...nel.org, peterz@...radead.org
Subject: Re: [RFC PATCH 0/2] libtraceevent/perf: Add support for trace-cmd
 plugins

On 6/18/12 8:21 AM, Steven Rostedt wrote:
>
> Anyway, I think it is important to get this into either libtraceevent or
> another library, but I agree with Namhyung that it should not go in, in
> its current form.

Great. No resistance to bringing this in.

> Either we add the 'pevent_' names to it, and we need to change things a
> bit.

Sure, namespace cleanup is trivial.

> I want to redesign the plugin interface. Well, I do not need to be the
> one to redesign it, but it needs to be updated by someone.
>
> Plugins need an interface that they can take parameters, or be modified
> at run time. An option passed to perf or trace-cmd could modify how the
> plugin works. Or during viewing of the output, parameters can be passed
> to tell plugins to do things differently.
>
> Basically, we need to discuss the interface between plugins and the
> libtraceevent library. Once we get a good idea of what is needed, then
> we can start reusing the code from trace-cmd to make a much better
> interface for users.

Ok. I'll poke around with this over the summer as I get spare time.

David
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