linux-kernel - Re: [PATCH 0/2] tracing: Tracing integration

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Date:	Tue, 15 Sep 2009 12:19:33 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Atsushi Tsuji <a-tsuji@...jp.nec.com>
Cc:	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	Ingo Molnar <mingo@...e.hu>, fweisbec@...il.com,
	"Frank Ch. Eigler" <fche@...hat.com>, paulus@...ba.org,
	systemtap@...rces.redhat.com
Subject: Re: [PATCH 0/2] tracing: Tracing integration - dynamic ftrace for
 SystemTap

On Tue, 2009-09-15 at 12:15 +0200, Peter Zijlstra wrote:
> On Tue, 2009-09-15 at 19:06 +0900, Atsushi Tsuji wrote:
> > The patches doesn't contain the performance counters integration,
> > since it is still in development. I think following implementations are
> > needed:
> > - add new type to perf_id (like PERF_TYPE_FTRACE)
> > - add event ids to struct dyn_ftrace
> > - add interfaces to reference event ids by user (via debugfs?)
> > - add probe function to count ftrace events (call do_perf_swcounter_event)
> 
> That's long since been done,.. 

Or are you talking about the mcount thing? Simply expose the mcount hook
as a regular tracepoint and perf can already use it.

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