linux-kernel - [tip:perfcounters/core] tracing, perf_counter: Add help text to CONFIG_EVENT

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Date:	Sun, 2 Aug 2009 13:09:47 GMT
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, jeff@...zik.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:perfcounters/core] tracing, perf_counter: Add help text to CONFIG_EVENT_PROFILE

Commit-ID:  470a1396c25c27b4aff08b14d5c9cd9b3da15e09
Gitweb:     http://git.kernel.org/tip/470a1396c25c27b4aff08b14d5c9cd9b3da15e09
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Wed, 29 Jul 2009 10:50:09 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sun, 2 Aug 2009 13:47:53 +0200

tracing, perf_counter: Add help text to CONFIG_EVENT_PROFILE

Explain what tracepoint profiling sources are about.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Acked-by: Jeff Garzik <jeff@...zik.org>
LKML-Reference: <1248856508.6987.3041.camel@...ns>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 init/Kconfig |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index cb2c092..823ee0a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -961,9 +961,17 @@ config PERF_COUNTERS
 	  Say Y if unsure.
 
 config EVENT_PROFILE
-	bool "Tracepoint profile sources"
+	bool "Tracepoint profiling sources"
 	depends on PERF_COUNTERS && EVENT_TRACING
 	default y
+	help
+	 Allow the use of tracepoints as software performance counters.
+
+	 When this is enabled, you can create perf counters based on
+	 tracepoints using PERF_TYPE_TRACEPOINT and the tracepoint ID
+	 found in debugfs://tracing/events/*/*/id. (The -e/--events
+	 option to the perf tool can parse and interpret symbolic
+	 tracepoints, in the subsystem:tracepoint_name format.)
 
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