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authorFrederic Weisbecker <fweisbec@gmail.com>2008-11-25 21:07:04 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-26 01:59:45 +0100
commitfb52607afcd0629776f1dc9e657647ceae81dd50 (patch)
tree7bf43b41ff8510d3098c089913cce56a9049f0fd /kernel/trace/Kconfig
parent509dceef6470442d8c7b8a43ec34125205840b3c (diff)
downloadop-kernel-dev-fb52607afcd0629776f1dc9e657647ceae81dd50.zip
op-kernel-dev-fb52607afcd0629776f1dc9e657647ceae81dd50.tar.gz
tracing/function-return-tracer: change the name into function-graph-tracer
Impact: cleanup This patch changes the name of the "return function tracer" into function-graph-tracer which is a more suitable name for a tracing which makes one able to retrieve the ordered call stack during the code flow. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/Kconfig')
-rw-r--r--kernel/trace/Kconfig19
1 files changed, 11 insertions, 8 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 620fead..eb9b901 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -12,7 +12,7 @@ config NOP_TRACER
config HAVE_FUNCTION_TRACER
bool
-config HAVE_FUNCTION_RET_TRACER
+config HAVE_FUNCTION_GRAPH_TRACER
bool
config HAVE_FUNCTION_TRACE_MCOUNT_TEST
@@ -63,15 +63,18 @@ config FUNCTION_TRACER
(the bootup default), then the overhead of the instructions is very
small and not measurable even in micro-benchmarks.
-config FUNCTION_RET_TRACER
- bool "Kernel Function return Tracer"
- depends on HAVE_FUNCTION_RET_TRACER
+config FUNCTION_GRAPH_TRACER
+ bool "Kernel Function Graph Tracer"
+ depends on HAVE_FUNCTION_GRAPH_TRACER
depends on FUNCTION_TRACER
help
- Enable the kernel to trace a function at its return.
- It's first purpose is to trace the duration of functions.
- This is done by setting the current return address on the thread
- info structure of the current task.
+ Enable the kernel to trace a function at both its return
+ and its entry.
+ It's first purpose is to trace the duration of functions and
+ draw a call graph for each thread with some informations like
+ the return value.
+ This is done by setting the current return address on the current
+ task structure into a stack of calls.
config IRQSOFF_TRACER
bool "Interrupts-off Latency Tracer"
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