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| author | Markus Metzger <markus.t.metzger@intel.com> | 2008-11-25 09:24:15 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-25 17:31:13 +0100 |
| commit | 1e9b51c28312f7334394aa30be56ff52c2b65b7e (patch) | |
| tree | c0a231d83541263ee938e3452475409323e4e9a9 /kernel/trace/Kconfig | |
| parent | 8bba1bf5e2434c83f2fe8b1422604ace9bbe4cb8 (diff) | |
| download | lwn-1e9b51c28312f7334394aa30be56ff52c2b65b7e.tar.gz lwn-1e9b51c28312f7334394aa30be56ff52c2b65b7e.zip | |
x86, bts, ftrace: a BTS ftrace plug-in prototype
Impact: add new ftrace plugin
A prototype for a BTS ftrace plug-in.
The tracer collects branch trace in a cyclic buffer for each cpu.
The tracer is not configurable and the trace for each snapshot is
appended when doing cat /debug/tracing/trace.
This is a proof of concept that will be extended with future patches
to become a (hopefully) useful tool.
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 9cbf7761f498..620feadff67a 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -28,6 +28,9 @@ config HAVE_DYNAMIC_FTRACE config HAVE_FTRACE_MCOUNT_RECORD bool +config HAVE_HW_BRANCH_TRACER + bool + config TRACER_MAX_TRACE bool @@ -233,6 +236,14 @@ config STACK_TRACER Say N if unsure. +config BTS_TRACER + depends on HAVE_HW_BRANCH_TRACER + bool "Trace branches" + select TRACING + help + This tracer records all branches on the system in a circular + buffer giving access to the last N branches for each cpu. + config DYNAMIC_FTRACE bool "enable/disable ftrace tracepoints dynamically" depends on FUNCTION_TRACER |