Add verbose printouts for im_start and im_stop

mysql-test/mysql-test-run.pl

@@ -3417,8 +3417,9 @@ sub im_start($$) {
     return;
   }
 
-  $instance_manager->{'pid'} =
-    mtr_get_pid_from_file($instance_manager->{'path_pid'});
+  my $pid=  mtr_get_pid_from_file($instance_manager->{'path_pid'});
+  $instance_manager->{'pid'} = $pid;
+  mtr_verbose("im_start: pid: $pid");
 }
 
 
@@ -3460,25 +3461,23 @@ sub im_stop($) {
 
   # Try graceful shutdown.
 
-  mtr_debug("IM-main pid: $instance_manager->{'pid'}");
-  mtr_debug("Stopping IM-main...");
-
+  mtr_verbose("Stopping IM-main, pid: $instance_manager->{'pid'}");
   mtr_kill_process($instance_manager->{'pid'}, 'TERM', 10);
 
   # If necessary, wait for angel process to die.
 
-  if (defined $instance_manager->{'angel_pid'})
+  my $pid= $instance_manager->{'angel_pid'};
+  if (defined $pid)
   {
-    mtr_debug("IM-angel pid: $instance_manager->{'angel_pid'}");
-    mtr_debug("Waiting for IM-angel to die...");
+    mtr_verbose("Waiting for IM-angel to die, pid: $pid");
 
     my $total_attempts= 10;
 
     for (my $cur_attempt=1; $cur_attempt <= $total_attempts; ++$cur_attempt)
     {
-      unless (kill (0, $instance_manager->{'angel_pid'}))
+      unless (kill (0, $pid))
       {
-        mtr_debug("IM-angel died.");
+        mtr_verbose("IM-angel died.");
         last;
       }
 
@@ -3494,14 +3493,14 @@ sub im_stop($) {
   {
     if (kill (0, $instance_manager->{'pid'}))
     {
-      mtr_debug("IM-main is still alive.");
+      mtr_warning("IM-main is still alive.");
       last;
     }
 
     if (defined $instance_manager->{'angel_pid'} &&
         kill (0, $instance_manager->{'angel_pid'}))
     {
-      mtr_debug("IM-angel is still alive.");
+      mtr_warning("IM-angel is still alive.");
       last;
     }
 
@@ -3509,7 +3508,7 @@ sub im_stop($) {
     {
       if (kill (0, $pid))
       {
-        mtr_debug("Guarded mysqld ($pid) is still alive.");
+        mtr_warning("Guarded mysqld ($pid) is still alive.");
         last;
       }
     }
@@ -3525,18 +3524,18 @@ sub im_stop($) {
 
     if (defined $instance_manager->{'angel_pid'})
     {
-      mtr_debug("Killing IM-angel...");
+      mtr_verbose("Killing IM-angel, pid: $instance_manager->{'angel_pid'}");
       mtr_kill_process($instance_manager->{'angel_pid'}, 'KILL', 10)
     }
 
-    mtr_debug("Killing IM-main...");
+    mtr_verbose("Killing IM-main, pid: $instance_manager->{'pid'}");
     mtr_kill_process($instance_manager->{'pid'}, 'KILL', 10);
 
     # Shutdown managed mysqld-processes. Some of them may be nonguarded, so IM
     # will not stop them on shutdown. So, we should firstly try to end them
     # legally.
 
-    mtr_debug("Killing guarded mysqld(s)...");
+    mtr_verbose("Killing guarded mysqld(s) " . join(@mysqld_pids));
     mtr_kill_processes(\@mysqld_pids);
 
     # Complain in error log so that a warning will be shown.