rcutorture: Allow repetition factors in Kconfig-fragment lists

Although it is currently possible to run the same test in parallel,
'--config "TINY01 TINY01 TINY01"' can get a bit verbose, especially
if you want to run 48 instances of TINY01 in parallel.  This commit
therefore allows prefixing the Kconfig fragment with a repeat count,
for example, '--config "48*TINY01"' to run 48 instances in parallel.
At least assuming that you have 48 CPUs and also gave '--cpus 48'.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

1 files changed, 19 insertions, 6 deletions

diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index dd2812ceb0ba..fbe2dbff1e21 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -55,7 +55,7 @@ usage () {
         echo "       --bootargs kernel-boot-arguments"
         echo "       --bootimage relative-path-to-kernel-boot-image"
         echo "       --buildonly"
-        echo "       --configs \"config-file list\""
+        echo "       --configs \"config-file list w/ repeat factor (3*TINY01)\""
         echo "       --cpus N"
         echo "       --datestamp string"
         echo "       --defconfig string"
@@ -178,13 +178,26 @@ fi
 touch $T/cfgcpu
 for CF in $configs
 do
-        if test -f "$CONFIGFRAG/$CF"
+        case $CF in
+        [0-9]\**|[0-9][0-9]\**|[0-9][0-9][0-9]\**)
+                config_reps=`echo $CF | sed -e 's/\*.*$//'`
+                CF1=`echo $CF | sed -e 's/^[^*]*\*//'`
+                ;;
+        *)
+                config_reps=1
+                CF1=$CF
+                ;;
+        esac
+        if test -f "$CONFIGFRAG/$CF1"
         then
-                cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF`
-                cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF" "$cpu_count"`
-                echo $CF $cpu_count >> $T/cfgcpu
+                cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
+                cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
+                for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
+                do
+                        echo $CF1 $cpu_count >> $T/cfgcpu
+                done
         else
-                echo "The --configs file $CF does not exist, terminating."
+                echo "The --configs file $CF1 does not exist, terminating."
                 exit 1
         fi
 done