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authorFrederic Weisbecker <fweisbec@gmail.com>2008-11-11 07:14:25 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-11 10:29:12 +0100
commit15e6cb3673ea6277999642802406a764b49391b0 (patch)
treed0a46a918caa64d5fb1ed37be3e026b30e94fe77 /kernel/trace/Makefile
parentcaf4b323b02a16c92fba449952ac6515ddc76d7a (diff)
downloadop-kernel-dev-15e6cb3673ea6277999642802406a764b49391b0.zip
op-kernel-dev-15e6cb3673ea6277999642802406a764b49391b0.tar.gz
tracing: add a tracer to catch execution time of kernel functions
Impact: add new tracing plugin which can trace full (entry+exit) function calls This tracer uses the low level function return ftrace plugin to measure the execution time of the kernel functions. The first field is the caller of the function, the second is the measured function, and the last one is the execution time in nanoseconds. - v3: - HAVE_FUNCTION_RET_TRACER have been added. Each arch that support ftrace return should enable it. - ftrace_return_stub becomes ftrace_stub. - CONFIG_FUNCTION_RET_TRACER depends now on CONFIG_FUNCTION_TRACER - Return traces printing can be used for other tracers on trace.c - Adapt to the new tracing API (no more ctrl_update callback) - Correct the check of "disabled" during insertion. - Minor changes... Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/Makefile')
-rw-r--r--kernel/trace/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index c8228b1..3e1f361 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -24,5 +24,6 @@ obj-$(CONFIG_NOP_TRACER) += trace_nop.o
obj-$(CONFIG_STACK_TRACER) += trace_stack.o
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
+obj-$(CONFIG_FUNCTION_RET_TRACER) += trace_functions_return.o
libftrace-y := ftrace.o
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