diff options
author | Davidlohr Bueso <dave@stgolabs.net> | 2015-07-22 14:07:27 -0700 |
---|---|---|
committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-10-06 11:24:40 -0700 |
commit | 095777c417db142970adeb776fa0cb10810b8122 (patch) | |
tree | b377fac46087f6340a87260388cc07db7433d91d /tools/testing | |
parent | 19a5ecde086a6a5287978b12ae948fa691b197b7 (diff) | |
download | op-kernel-dev-095777c417db142970adeb776fa0cb10810b8122.zip op-kernel-dev-095777c417db142970adeb776fa0cb10810b8122.tar.gz |
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 <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'tools/testing')
3 files changed, 9 insertions, 1 deletions
diff --git a/tools/testing/selftests/rcutorture/configs/lock/CFLIST b/tools/testing/selftests/rcutorture/configs/lock/CFLIST index 6910b73..6ed3279 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 0000000..1d1da14 --- /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 0000000..8ac3730 --- /dev/null +++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot @@ -0,0 +1 @@ +locktorture.torture_type=rtmutex_lock |