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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-07-29 10:50:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-02 13:47:53 +0200 |
| commit | 470a1396c25c27b4aff08b14d5c9cd9b3da15e09 (patch) | |
| tree | d60cbc564b8c7fc471d134423cebdba50ab01192 | |
| parent | 2d1b6949d2c855f195de0f5146625015ecca3944 (diff) | |
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>
| -rw-r--r-- | init/Kconfig | 10 |
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.) endmenu |