diff options
| author | Markus Metzger <markus.t.metzger@intel.com> | 2008-11-25 03:24:15 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-25 11:31:13 -0500 |
| commit | 1e9b51c28312f7334394aa30be56ff52c2b65b7e (patch) | |
| tree | c0a231d83541263ee938e3452475409323e4e9a9 /arch/x86 | |
| parent | 8bba1bf5e2434c83f2fe8b1422604ace9bbe4cb8 (diff) | |
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 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig.cpu | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index b815664fe370..85a78575956c 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu | |||
| @@ -515,6 +515,7 @@ config CPU_SUP_UMC_32 | |||
| 515 | config X86_DS | 515 | config X86_DS |
| 516 | def_bool X86_PTRACE_BTS | 516 | def_bool X86_PTRACE_BTS |
| 517 | depends on X86_DEBUGCTLMSR | 517 | depends on X86_DEBUGCTLMSR |
| 518 | select HAVE_HW_BRANCH_TRACER | ||
| 518 | 519 | ||
| 519 | config X86_PTRACE_BTS | 520 | config X86_PTRACE_BTS |
| 520 | bool "Branch Trace Store" | 521 | bool "Branch Trace Store" |