Commit-ID: ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4
Gitweb: http://git.kernel.org/tip/ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Fri, 29 Jan 2016 14:58:17 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 31 Mar 2016 13:38:53 -0700
rcutorture: Make rcuperf collect expedited event-trace data
This commit enables ftrace in the rcuperf TREE kernel build and adds
an ftrace_dump() at the end of rcuperf processing. This data will be
used to measure the actual durations of the expedited grace periods
without the added delays inherent in the kernel-module measurements.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/rcuperf.c | 1 +
tools/testing/selftests/rcutorture/configs/rcuperf/TREE | 1 +
2 files changed, 2 insertions(+)
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index e18d016..12561f9 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -404,6 +404,7 @@ rcu_perf_writer(void *arg)
perf_type, me, MIN_MEAS);
if (atomic_inc_return(&n_rcu_perf_writer_finished) >=
nrealwriters) {
+ rcu_ftrace_dump(DUMP_ALL);
PERFOUT_STRING("Test complete");
t_rcu_perf_writer_finished = t;
if (gp_exp) {
diff --git a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE b/tools/testing/selftests/rcutorture/configs/rcuperf/TREE
index 614e107..a312f67 100644
--- a/tools/testing/selftests/rcutorture/configs/rcuperf/TREE
+++ b/tools/testing/selftests/rcutorture/configs/rcuperf/TREE
@@ -17,3 +17,4 @@ CONFIG_PROVE_LOCKING=n
CONFIG_RCU_BOOST=n
CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
--
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