rcutorture: Add batch number to script printout

Currently, the scripts print "----Start batch" at the beginning of each
batch, which does serve as a good visual delimiter between batches.
Unfortunately, if there are a lot of batches, it is hard to quickly
estimate test runtime from the output of "--dryrun sched".  This commit
therefore adds a batch number, so that the beginning-of-batch output
looks like this "----Start batch 10" for the tenth batch.

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

diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index f648360..013c482 100755 (executable)
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -307,10 +307,10 @@ awk < $T/cfgcpu.pack \
 }
 
 # Dump out the scripting required to run one test batch.
-function dump(first, pastlast)
+function dump(first, pastlast, batchnum)
 {
-       print "echo ----Start batch: `date`";
-       print "echo ----Start batch: `date` >> " rd "/log";
+       print "echo ----Start batch " batchnum ": `date`";
+       print "echo ----Start batch " batchnum ": `date` >> " rd "/log";
        jn=1
        for (j = first; j < pastlast; j++) {
                builddir=KVM "/b" jn
@@ -371,25 +371,28 @@ END {
        njobs = i;
        nc = ncpus;
        first = 0;
+       batchnum = 1;
 
        # Each pass through the following loop considers one test.
        for (i = 0; i < njobs; i++) {
                if (ncpus == 0) {
                        # Sequential test specified, each test its own batch.
-                       dump(i, i + 1);
+                       dump(i, i + 1, batchnum);
                        first = i;
+                       batchnum++;
                } else if (nc < cpus[i] && i != 0) {
                        # Out of CPUs, dump out a batch.
-                       dump(first, i);
+                       dump(first, i, batchnum);
                        first = i;
                        nc = ncpus;
+                       batchnum++;
                }
                # Account for the CPUs needed by the current test.
                nc -= cpus[i];
        }
        # Dump the last batch.
        if (ncpus != 0)
-               dump(first, i);
+               dump(first, i, batchnum);
 }' >> $T/script
 
 cat << ___EOF___ >> $T/script