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rcutorture: Make rcuperf collect expedited event-trace data

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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@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2016-01-29 14:58:17 -08:00
parent e588f35492
commit ac2bb275e8
2 changed files with 2 additions and 0 deletions
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kernel/rcu/rcuperf.c
+1
View File
@@ -404,6 +404,7 @@ rcu_perf_writer(void *arg)
perf_type, me, MIN_MEAS); perf_type, me, MIN_MEAS);
if (atomic_inc_return(&n_rcu_perf_writer_finished) >= if (atomic_inc_return(&n_rcu_perf_writer_finished) >=
nrealwriters) { nrealwriters) {
rcu_ftrace_dump(DUMP_ALL);
PERFOUT_STRING("Test complete"); PERFOUT_STRING("Test complete");
t_rcu_perf_writer_finished = t; t_rcu_perf_writer_finished = t;
if (gp_exp) { if (gp_exp) {
tools/testing/selftests/rcutorture/configs/rcuperf/TREE
+1
View File
@@ -17,3 +17,4 @@ CONFIG_PROVE_LOCKING=n
CONFIG_RCU_BOOST=n CONFIG_RCU_BOOST=n
CONFIG_DEBUG_OBJECTS_RCU_HEAD=n CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
CONFIG_RCU_EXPERT=y CONFIG_RCU_EXPERT=y
CONFIG_RCU_TRACE=y