From 095777c417db142970adeb776fa0cb10810b8122 Mon Sep 17 00:00:00 2001 From: Davidlohr Bueso Date: Wed, 22 Jul 2015 14:07:27 -0700 Subject: locktorture: Support rtmutex torturing Real time mutexes is one of the few general primitives that we do not have in locktorture. Address this -- a few considerations: o To spice things up, enable competing thread(s) to become rt, such that we can stress different prio boosting paths in the rtmutex code. Introduce a ->task_boost callback, only used by rtmutex-torturer. Tasks will boost/deboost around every 50k (arbitrarily) lock/unlock operations. o Hold times are similar to what we have for other locks: only occasionally having longer hold times (per ~200k ops). So we roughly do two full rt boost+deboosting ops with short hold times. Signed-off-by: Davidlohr Bueso Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- tools/testing/selftests/rcutorture/configs/lock/CFLIST | 3 ++- tools/testing/selftests/rcutorture/configs/lock/LOCK05 | 6 ++++++ tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot | 1 + 3 files changed, 9 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK05 create mode 100644 tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot (limited to 'tools/testing') diff --git a/tools/testing/selftests/rcutorture/configs/lock/CFLIST b/tools/testing/selftests/rcutorture/configs/lock/CFLIST index 6910b7370761..6ed32794eaa1 100644 --- a/tools/testing/selftests/rcutorture/configs/lock/CFLIST +++ b/tools/testing/selftests/rcutorture/configs/lock/CFLIST @@ -1,4 +1,5 @@ LOCK01 LOCK02 LOCK03 -LOCK04 \ No newline at end of file +LOCK04 +LOCK05 diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK05 b/tools/testing/selftests/rcutorture/configs/lock/LOCK05 new file mode 100644 index 000000000000..1d1da1477fc3 --- /dev/null +++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK05 @@ -0,0 +1,6 @@ +CONFIG_SMP=y +CONFIG_NR_CPUS=4 +CONFIG_HOTPLUG_CPU=y +CONFIG_PREEMPT_NONE=n +CONFIG_PREEMPT_VOLUNTARY=n +CONFIG_PREEMPT=y diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot new file mode 100644 index 000000000000..8ac37307c987 --- /dev/null +++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot @@ -0,0 +1 @@ +locktorture.torture_type=rtmutex_lock -- cgit v1.2.3