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diff --git a/lib/runtime_tools/examples/dist.systemtap b/lib/runtime_tools/examples/dist.systemtap
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+++ b/lib/runtime_tools/examples/dist.systemtap
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+/* example usage: stap /path/to/dist.systemtap -x <pid> */
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Scott Lystig Fritchie and Andreas Schultz, 2011. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+/*
+ * Note: This file assumes that you're using the non-SMP-enabled Erlang
+ *       virtual machine, "beam".  The SMP-enabled VM is called "beam.smp".
+ *       Note that other variations of the virtual machine also have
+ *       different names, e.g. the debug build of the SMP-enabled VM
+ *       is "beam.debug.smp".
+ *
+ *       To use a different virtual machine, replace each instance of
+ *       "beam" with "beam.smp" or the VM name appropriate to your
+ *       environment.
+ */
+
+probe process("beam").mark("dist-monitor")
+{
+    printf("monitor: pid %d, who %s, what %s, node %s, type %s, reason %s\n",
+           pid(),
+           user_string($arg1), user_string($arg2), user_string($arg3), user_string($arg4),
+           user_string($arg5));
+}
+
+probe process("beam").mark("dist-port_busy")
+{
+    printf("dist port_busy: node %s, port %s, remote_node %s, blocked pid %s\n",
+           user_string($arg1), user_string($arg2), user_string($arg3), user_string($arg4));
+    blocked_procs[user_string($arg4)] = timestamp;
+}
+
+probe process("beam").mark("dist-port_busy")
+{
+    printf("dist port_busy: node %s, port %s, remote_node %s, blocked pid %s\n",
+           user_string($arg1), user_string($arg2), user_string($arg3), user_string($arg4));
+    blocked_procs[user_string($arg4)] = timestamp;
+}
+
+probe process("beam").mark("dist-output")
+{
+    printf("dist output: node %s, port %s, remote_node %s bytes %d\n",
+           user_string($arg1), user_string($arg2), user_string($arg3), $arg4);
+}
+
+probe process("beam").mark("dist-outputv")
+{
+    printf("port outputv: node %s, port %s, remote_node %s bytes %d\n",
+           user_string($arg1), user_string($arg2), user_string($arg3), $arg4);
+}
+
+probe process("beam").mark("process-scheduled")
+{
+    pidstr = user_string($arg1);
+    if (pidstr in blocked_procs) {
+	printf("blocked pid %s scheduled now, waited %d microseconds\n",
+		pidstr, (timestamp - blocked_procs[pidstr]) / 1000);
+	delete blocked_procs[pidstr];
+    }
+}
+
+global blocked_procs;