x86, bts, ftrace: a BTS ftrace plug-in prototype

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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>

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Markus Metzger 2008-11-25 09:24:15 +01:00 • committed by Ingo Molnar

parent 8bba1bf5e2

commit 1e9b51c283

5 changed files with 301 additions and 0 deletions

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1

arch/x86/Kconfig.cpu

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11

kernel/trace/Kconfig

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1

kernel/trace/Makefile

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12

kernel/trace/trace.h

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276

kernel/trace/trace_bts.c

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