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authorSteven Noonan <steven@uplinklabs.net>2008-09-19 03:06:43 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-14 10:37:43 +0200
commitfb1b6d8b5154c692172a424e45fbd0573295cb93 (patch)
treed9a7ad2c629a6133998402354e77cd721e4962b4 /kernel/trace/Kconfig
parent5bf9a1ee350a10feb94107de32a203d81fbbe706 (diff)
ftrace: add nop tracer
A no-op tracer which can serve two purposes: 1. A template for development of a new tracer. 2. A convenient way to see ftrace_printk() calls without an irrelevant trace making the output messy. [ mingo@elte.hu: resolved conflicts ] Signed-off-by: Steven Noonan <steven@uplinklabs.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/Kconfig')
-rw-r--r--kernel/trace/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 16e5bb5daaa..d7b2de74463 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -101,6 +101,16 @@ config SCHED_TRACER
This tracer tracks the latency of the highest priority task
to be scheduled in, starting from the point it has woken up.
+config NOP_TRACER
+ bool "NOP Tracer"
+ depends on HAVE_FTRACE
+ depends on DEBUG_KERNEL
+ select TRACING
+ help
+ This tracer does nothing. The primary purpose for it is to
+ politely print the output of ftrace_printk() calls without
+ the overhead of an irrelevant trace taking place.
+
config CONTEXT_SWITCH_TRACER
bool "Trace process context switches"
depends on HAVE_FTRACE