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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2011-06-17 15:53:19 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-09-28 21:38:12 -0700 |
| commit | 29c00b4a1d9e277786120032aa8364631820d863 (patch) | |
| tree | 23bf0c8cdb5268ef92ef9ed007639705e922b1b0 /kernel/rcupdate.c | |
| parent | 9d68197c05201d8edc70d58bd1d5dad05d8455e8 (diff) | |
| download | lwn-29c00b4a1d9e277786120032aa8364631820d863.tar.gz lwn-29c00b4a1d9e277786120032aa8364631820d863.zip | |
rcu: Add event-tracing for RCU callback invocation
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>
Diffstat (limited to 'kernel/rcupdate.c')
| -rw-r--r-- | kernel/rcupdate.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index 09b3b1b54e02..ca0d23b6b3e8 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -46,6 +46,11 @@ #include <linux/module.h> #include <linux/hardirq.h> +#define CREATE_TRACE_POINTS +#include <trace/events/rcu.h> + +#include "rcu.h" + #ifdef CONFIG_DEBUG_LOCK_ALLOC static struct lock_class_key rcu_lock_key; struct lockdep_map rcu_lock_map = |