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>
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@ -404,6 +404,7 @@ rcu_perf_writer(void *arg)
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perf_type, me, MIN_MEAS);
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perf_type, me, MIN_MEAS);
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if (atomic_inc_return(&n_rcu_perf_writer_finished) >=
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if (atomic_inc_return(&n_rcu_perf_writer_finished) >=
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nrealwriters) {
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nrealwriters) {
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rcu_ftrace_dump(DUMP_ALL);
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PERFOUT_STRING("Test complete");
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PERFOUT_STRING("Test complete");
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t_rcu_perf_writer_finished = t;
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t_rcu_perf_writer_finished = t;
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if (gp_exp) {
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if (gp_exp) {
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@ -17,3 +17,4 @@ CONFIG_PROVE_LOCKING=n
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CONFIG_RCU_BOOST=n
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CONFIG_RCU_BOOST=n
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CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
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CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
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CONFIG_RCU_EXPERT=y
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CONFIG_RCU_EXPERT=y
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CONFIG_RCU_TRACE=y
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