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diff --git a/lib/dtrace/examples/garbage-collection.systemtap b/lib/dtrace/examples/garbage-collection.systemtap
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+/*
+ * %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("gc_major-start")
+{
+ printf("GC major start pid %s need %d words\n", user_string($arg1), $arg2);
+}
+
+probe process("beam").mark("gc_minor-start")
+{
+ printf("GC minor start pid %s need %d words\n", user_string($arg1), $arg2);
+}
+
+probe process("beam").mark("gc_major-end")
+{
+ printf("GC major end pid %s reclaimed %d words\n", user_string($arg1), $arg2);
+}
+
+probe process("beam").mark("gc_minor-start")
+{
+ printf("GC minor end pid %s reclaimed %d words\n", user_string($arg1), $arg2);
+}