ktest: Add timings for commands

I find that I usually like to see how long a make or other command takes,
and adding a start and end time and reporting how long each command runs
(in seconds) is helpful.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -1534,10 +1534,14 @@ sub fail {
 
 sub run_command {
     my ($command, $redirect) = @_;
+    my $start_time;
+    my $end_time;
     my $dolog = 0;
     my $dord = 0;
     my $pid;
 
+    $start_time = time;
+
     $command =~ s/\$SSH_USER/$ssh_user/g;
     $command =~ s/\$MACHINE/$machine/g;
 
@@ -1570,6 +1574,15 @@ sub run_command {
     close(LOG) if ($dolog);
     close(RD)  if ($dord);
 
+    $end_time = time;
+    my $delta = $end_time - $start_time;
+
+    if ($delta == 1) {
+	doprint "[1 second] ";
+    } else {
+	doprint "[$delta seconds] ";
+    }
+
     if ($failed) {
 	doprint "FAILED!\n";
     } else {