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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-06-17 15:53:19 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-09-28 21:38:12 -0700
commit29c00b4a1d9e277786120032aa8364631820d863 (patch)
tree23bf0c8cdb5268ef92ef9ed007639705e922b1b0 /kernel/rcupdate.c
parent9d68197c05201d8edc70d58bd1d5dad05d8455e8 (diff)
downloadvexpress-lsk-29c00b4a1d9e277786120032aa8364631820d863.tar.gz
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.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 09b3b1b54e0..ca0d23b6b3e 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 =