From 055173dba4a263acf10325a49eebf82915369ed2 Mon Sep 17 00:00:00 2001
From: "George V. Neville-Neil" <gnn@FreeBSD.org>
Date: Sat, 12 May 2012 20:38:18 +0000
Subject: Add the remaining scripts from the DTraceToolkit, version 0.99, to
 the vendor tree.

http://www.brendangregg.com/dtrace.html#DTraceToolkit
---
 Disk/hotspot.d | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 Disk/hotspot.d

(limited to 'Disk/hotspot.d')

diff --git a/Disk/hotspot.d b/Disk/hotspot.d
new file mode 100755
index 000000000000..6ab6ee45d69a
--- /dev/null
+++ b/Disk/hotspot.d
@@ -0,0 +1,71 @@
+#!/usr/sbin/dtrace -s
+/*
+ * hotspot.d - plot disk event by location, look for hotspots.
+ *             Written in DTrace (Solaris 10 3/05).
+ *
+ * This simple DTrace script determines if disk activity is occuring in
+ * the one place - a "hotspot". This helps us understand the system's usage
+ * of a disk, it does not imply that the existance or not of a hotspot is
+ * good or bad (often may be good, less seeking).
+ *
+ * $Id: hotspot.d 3 2007-08-01 10:50:08Z brendan $
+ *
+ * USAGE:       hotspot.d       # hit Ctrl-C to end
+ *
+ * FIELDS:
+ *              Disk            disk instance name
+ *              Major           driver major number
+ *              Minor           driver minor number
+ *              value           location, by megabyte
+ *              count           number of I/O operations
+ *
+ * COPYRIGHT: Copyright (c) 2005, 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
+ *
+ * 07-May-2005	Brendan Gregg	Created this.
+ * 20-Apr-2006	   "      "	Last update.
+ */
+
+#pragma D option quiet
+
+inline int DISK_MB_MAX = 1000000;	/* max size of a single disk */
+inline int REPORT_SCALE_MB = 1000;	/* output step size for report */
+
+/*
+ * Print header
+ */
+dtrace:::BEGIN
+{
+	printf("Tracing... Hit Ctrl-C to end.\n");
+}
+
+/*
+ * Process disk event
+ */
+io:::start
+{
+	this->mb = args[0]->b_blkno / 2048;
+	@Block[args[1]->dev_statname, args[1]->dev_major, args[1]->dev_minor] =
+	    lquantize(this->mb, 0, DISK_MB_MAX, REPORT_SCALE_MB);
+}
+
+/*
+ * Print final report
+ */
+dtrace:::END
+{
+	printa("Disk: %s   Major,Minor: %d,%d\n%@d\n", @Block);
+}
-- 
cgit v1.2.3