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rcutorture: Change units of onoff_interval to jiffies

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Some RCU bugs have been sensitive to the frequency of CPU-hotplug
operations, which have been gradually increased over time.  But this
frequency is now at the one-second lower limit that can be specified using
the rcutorture.onoff_interval kernel parameter.  This commit therefore
changes the units of rcutorture.onoff_interval from seconds to jiffies,
and also sets the value specified for this kernel parameter in the TREE03
rcutorture scenario to 200, which is 200 milliseconds for HZ=1000.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2018-05-08 09:20:34 -07:00
parent f2e2df5978
commit 028be12b29
4 changed files with 6 additions and 6 deletions
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2
tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot
View File

@@ -1,4 +1,4 @@
rcutorture.onoff_interval=1 rcutorture.onoff_holdoff=30
rcutorture.onoff_interval=200 rcutorture.onoff_holdoff=30
rcutree.gp_preinit_delay=12
rcutree.gp_init_delay=3
rcutree.gp_cleanup_delay=3

2
tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
View File

@@ -39,7 +39,7 @@ rcutorture_param_onoff () {
if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
then
echo CPU-hotplug kernel, adding rcutorture onoff. 1>&2
echo rcutorture.onoff_interval=3 rcutorture.onoff_holdoff=30
echo rcutorture.onoff_interval=1000 rcutorture.onoff_holdoff=30
fi
}