rcu: Add event-tracing for RCU callback invocation

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There was recently some controversy about the overhead of invoking RCU
callbacks.  Add TRACE_EVENT()s to obtain fine-grained timings for the
start and stop of a batch of callbacks and also for each callback invoked.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2011-06-17 15:53:19 -07:00 • committed by Paul E. McKenney

parent 9d68197c05

commit 29c00b4a1d

6 changed files with 219 additions and 54 deletions

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50

include/linux/rcupdate.h

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98

include/trace/events/rcu.h

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79

kernel/rcu.h

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5

kernel/rcupdate.c

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26

kernel/rcutiny.c

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15

kernel/rcutree.c

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