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diff --git a/cddl/contrib/dtracetoolkit/Kernel/priclass.d b/cddl/contrib/dtracetoolkit/Kernel/priclass.d
new file mode 100755
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+++ b/cddl/contrib/dtracetoolkit/Kernel/priclass.d
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+#!/usr/sbin/dtrace -s
+/*
+ * priclass.d - priority distribution by scheduling class.
+ *              Written using DTrace (Solaris 10 3/05)
+ *
+ * This is a simple DTrace script that samples at 1000 Hz the current
+ * thread's scheduling class and priority. A distribution plot is printed.
+ *
+ * With priorities, the higher the priority the better chance the thread
+ * has of being scheduled.
+ *
+ * This idea came from the script /usr/demo/dtrace/pri.d, which
+ * produces similar output for priority changes, not samples.
+ *
+ * $Id: priclass.d 3 2007-08-01 10:50:08Z brendan $
+ *
+ * USAGE:       priclass.d      # hit Ctrl-C to end sampling
+ *
+ * FIELDS:
+ *              value           process priority
+ *              count           number of samples of at least this priority
+ *
+ * Also printed is the scheduling class,
+ *
+ *		TS		time sharing
+ *		IA		interactive
+ *		RT		real time
+ *		SYS		system
+ *		FSS		fair share schedular
+ *
+ * BASED ON: /usr/demo/dtrace/pri.d
+ *
+ * SEE ALSO: DTrace Guide "profile Provider" chapter (docs.sun.com)
+ *           dispadmin(1M)
+ *
+ * PORTIONS: Copyright (c) 2006 Brendan Gregg.
+ *
+ * CDDL HEADER START
+ *
+ *  The contents of this file are subject to the terms of the
+ *  Common Development and Distribution License, Version 1.0 only
+ *  (the "License").  You may not use this file except in compliance
+ *  with the License.
+ *
+ *  You can obtain a copy of the license at Docs/cddl1.txt
+ *  or http://www.opensolaris.org/os/licensing.
+ *  See the License for the specific language governing permissions
+ *  and limitations under the License.
+ *
+ * CDDL HEADER END
+ *
+ * 12-Feb-2006	Brendan Gregg	Created this.
+ * 22-Apr-2006	   "      "	Last update.
+ */
+
+#pragma D option quiet
+
+dtrace:::BEGIN
+{
+	printf("Sampling... Hit Ctrl-C to end.\n");
+}
+
+profile:::profile-1000hz
+{
+	@count[stringof(curlwpsinfo->pr_clname)]
+	    = lquantize(curlwpsinfo->pr_pri, 0, 170, 10);
+}