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torture: Allow "CFLIST" to specify default list of scenarios 

On a large system, it can be convenient to tell rcutorture to run
several instances of the default scenarios.  Currently, this requires
explicitly listing them, for example, "--configs '2*SRCU-N 2*SRCU-P...'".
Although this works, it is rather inconvenient.

This commit therefore allows "CFLIST" to be specified to indicate the
default list of scenarios called out in the relevant CFLIST file, for
example, for RCU, tools/testing/selftests/rcutorture/configs/rcu/CFLIST.
In addition, multipliers may be used to run multiple instances of all
the scenarios.  For example, on a 256-CPU system, "--configs '3*CFLIST'"
would run three instances of each scenario concurrently with one CPU
left over.  Thus "--configs '3*CFLIST TINY01'" would exactly consume all
256 CPUs, which makes rcutorture's jitter feature more effective.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2019-11-22 06:14:21 -08:00
parent 5155be9994
commit 25b4da74a9
1 changed files with 13 additions and 6 deletions
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19
tools/testing/selftests/rcutorture/bin/kvm.sh
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@ -198,9 +198,10 @@ fi
CONFIGFRAG=${KVM}/configs/${TORTURE_SUITE}; export CONFIGFRAG
defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
if test -z "$configs"
then
configs="`cat $CONFIGFRAG/CFLIST`"
configs=$defaultconfigs
fi
if test -z "$resdir"
@ -209,7 +210,7 @@ then
fi
# Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
touch $T/cfgcpu
configs_derep=
for CF in $configs
do
case $CF in
@ -222,15 +223,21 @@ do
CF1=$CF
;;
esac
for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
do
configs_derep="$configs_derep $CF1"
done
done
touch $T/cfgcpu
configs_derep="`echo $configs_derep | sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
for CF1 in $configs_derep
do
if test -f "$CONFIGFRAG/$CF1"
then
cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
cpu_count=`configfrag_boot_maxcpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
do
echo $CF1 $cpu_count >> $T/cfgcpu
done
echo $CF1 $cpu_count >> $T/cfgcpu
else
echo "The --configs file $CF1 does not exist, terminating."
exit 1