Commit 58524e0f authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcutorture: Allow specifying per-scenario stat_interval 



The rcutorture test suite makes double use of the rcutorture.stat_interval
module parameter.  As its name suggests, it controls the frequency
of statistics printing, but it also controls the rcu_torture_writer()
stall timeout.  The current setting of 15 seconds works surprisingly well.
However, given that the RCU tasks stall-warning timeout is ten -minutes-,
15 seconds is too short for TASKS02, which runs a non-preemptible kernel
on a single CPU.

This commit therefore adds checks for per-scenario specification of the
rcutorture.stat_interval module parameter.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 3831fc02

tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot

+1 −0
Original line number Diff line number Diff line 
rcutorture.torture_type=tasks

rcutorture.stat_interval=60

tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh

+14 −2
Original line number Diff line number Diff line
@@ -9,7 +9,7 @@ 


# rcutorture_param_n_barrier_cbs bootparam-string

#

# Adds n_barrier_cbs rcutorture module parameter to kernels having it.

# Adds n_barrier_cbs rcutorture module parameter if not already specified.

rcutorture_param_n_barrier_cbs () {

	if echo $1 | grep -q "rcutorture\.n_barrier_cbs"

	then
@@ -30,13 +30,25 @@ rcutorture_param_onoff () { 
	fi

}



# rcutorture_param_stat_interval bootparam-string

#

# Adds stat_interval rcutorture module parameter if not already specified.

rcutorture_param_stat_interval () {

	if echo $1 | grep -q "rcutorture\.stat_interval"

	then

		:

	else

		echo rcutorture.stat_interval=15

	fi

}



# per_version_boot_params bootparam-string config-file seconds

#

# Adds per-version torture-module parameters to kernels supporting them.

per_version_boot_params () {

	echo $1 `rcutorture_param_onoff "$1" "$2"` \

		`rcutorture_param_n_barrier_cbs "$1"` \

		rcutorture.stat_interval=15 \

		`rcutorture_param_stat_interval "$1"` \

		rcutorture.shutdown_secs=$3 \

		rcutorture.test_no_idle_hz=1 \

		rcutorture.verbose=1