linux-kernel - [PATCH -tip perf/probes 0/5] perf-probe and kprobe-tracer updates

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Date:	Tue, 03 Nov 2009 19:12:04 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	lkml <linux-kernel@...r.kernel.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Jim Keniston <jkenisto@...ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: [PATCH -tip perf/probes 0/5] perf-probe and kprobe-tracer updates

Hi,

Here are some updates according to previous LKML threads.
 - Update perf-probe document.
 - Improve error messages.
 - Fall back to non-dwarf mode if possible.
 - Change group name to probe.
 - Rename kprobe-tracer to kprobe-event.

BTW, I think perf-probe and kprobe-event might better share
similar syntax for not confusing users. And for that purpose,
perf-probe syntax should introduce event/group specifier,
for example,

 perf probe "newgroup:newevnt=func:10 arg1 arg2"

adds the newevent under newgroup. On the other hand, ftrace
users can also add a new event as below;

 echo 'newgroup:newevent=func+0x18 arg1=$a1 arg2=$a2' > kprobe_events

Any thoughts?

TODO:
 - Support --list option to show probes.
 - Support --del option to remove probes.
 - Simplify probe names.
 - Support --line option to show which lines user can probe.
 - Support lazy string matching.

Thank you,

---

Masami Hiramatsu (5):
      tracing/kprobes: Rename Kprobe-tracer to kprobe-event
      perf/probes: Rename perf probe events group name
      perf/probes: Fall back to non-dwarf if possible
      perf/probes: Improve error messages
      perf/probe: Update Documentation/perf-probe.txt


 Documentation/trace/kprobetrace.txt     |   34 ++++++-------
 kernel/trace/Kconfig                    |   19 ++++---
 kernel/trace/Makefile                   |    2 -
 kernel/trace/trace_kprobe.c             |    6 +-
 tools/perf/Documentation/perf-probe.txt |   17 +++---
 tools/perf/builtin-probe.c              |   84 ++++++++++++++++++-------------
 tools/perf/util/probe-finder.c          |    7 ++-
 7 files changed, 95 insertions(+), 74 deletions(-)

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division
e-mail: mhiramat@...hat.com
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