rcu: Track CPU-hotplug duration statistics
authorPaul E. McKenney <paul.mckenney@linaro.org>
Mon, 23 Jul 2012 19:05:55 +0000 (12:05 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Sun, 23 Sep 2012 14:42:22 +0000 (07:42 -0700)
commit13dbf9140c726c307a9c7e2b7ff83cf95da3bb44
treec74294271b88bb0a99f841c214c0f10b8b6ab449
parentab840f7a06df780c4db01f34a5660b1e472d9ca6
rcu: Track CPU-hotplug duration statistics

Many rcutorture runs include CPU-hotplug operations in their stress
testing.  This commit accumulates statistics on the durations of these
operations in deference to the recent concern about the overhead and
latency of these operations.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
kernel/rcutorture.c