From: Paul E. McKenney Date: Fri, 29 Jan 2016 22:58:17 +0000 (-0800) Subject: rcutorture: Make rcuperf collect expedited event-trace data X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ac2bb275e8e5abddb0815ff2b7aa383ed6d007a4;p=linux-beck.git 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 --- 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