torture: Make kvm.sh "--dryrun sched" summarize number of batches

Knowing the number of batches that kvm.sh will split a run into allows
estimation of the duration of a test, give or take the number of builds.
This commit therefore adds a line of output to "--dryrun sched" that
gives the number of batches that will be run.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index bd07df70b9c903265a22a680f422449b4b75b59a..1078be1bd0added19715e1dfe492215dac06993f 100755 (executable)
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -536,6 +536,8 @@ then
        egrep 'Start batch|Starting build\.' $T/script |
                grep -v ">>" |
                sed -e 's/:.*$//' -e 's/^echo //'
+       nbatches="`grep 'Start batch' $T/script | grep -v ">>" | wc -l`"
+       echo Total number of batches: $nbatches
        exit 0
 else
        # Not a dryrun, so run the script.