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Commit ac2bb275 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent e588f354

kernel/rcu/rcuperf.c

+1 −0
Original line number Diff line number Diff line
@@ -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) {

tools/testing/selftests/rcutorture/configs/rcuperf/TREE

+1 −0
Original line number Diff line number Diff line
@@ -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