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-rw-r--r--init/Kconfig13
1 files changed, 11 insertions, 2 deletions
diff --git a/init/Kconfig b/init/Kconfig
index d10f31d..25373cf 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -932,6 +932,7 @@ menu "Performance Counters"
config PERF_COUNTERS
bool "Kernel Performance Counters"
+ default y if PROFILING
depends on HAVE_PERF_COUNTERS
select ANON_INODES
help
@@ -953,9 +954,17 @@ config PERF_COUNTERS
Say Y if unsure.
config EVENT_PROFILE
- bool "Tracepoint profile sources"
- depends on PERF_COUNTERS && EVENT_TRACER
+ 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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