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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-01-29 14:58:17 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 13:38:53 -0700 |
| commit | ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4 (patch) | |
| tree | c9f879e07657c12b69995baf2850574872567326 | |
| parent | rcutorture: Print measure of batching efficiency (diff) | |
| download | wireguard-linux-ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4.tar.xz wireguard-linux-ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4.zip | |
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@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/rcu/rcuperf.c | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/rcutorture/configs/rcuperf/TREE | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index e18d016a9888..12561f96f0a2 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 614e107f6db5..a312f671a29a 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 |