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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-07-29 10:50:09 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-02 13:47:53 +0200
commit470a1396c25c27b4aff08b14d5c9cd9b3da15e09 (patch)
treed60cbc564b8c7fc471d134423cebdba50ab01192 /init/Kconfig
parent2d1b6949d2c855f195de0f5146625015ecca3944 (diff)
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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@chello.nl> Acked-by: Jeff Garzik <jeff@garzik.org> LKML-Reference: <1248856508.6987.3041.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init/Kconfig')
-rw-r--r--init/Kconfig10
1 files changed, 9 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index cb2c0927022..823ee0a2d2a 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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