1 files changed, 81 insertions, 0 deletions
diff --git a/Disk/bitesize.d b/Disk/bitesize.d
new file mode 100755
index 000000000000..f2e8ea4fcc3b
--- /dev/null
+++ b/Disk/bitesize.d
@@ -0,0 +1,81 @@
+#!/usr/sbin/dtrace -s
+/*
+ * bitesize.d - analyse disk I/O size by process.
+ *              Written using DTrace (Solaris 10 3/05).
+ *
+ * This produces a report for the size of disk events caused by
+ * processes. These are the disk events sent by the block I/O driver.
+ *
+ * If applications must use the disks, we generally prefer they do so
+ * with large I/O sizes.
+ *
+ * $Id: bitesize.d 3 2007-08-01 10:50:08Z brendan $
+ *
+ * USAGE:	bitesize.d	# wait several seconds, then hit Ctrl-C
+ *
+ * FIELDS:
+ *		PID		process ID
+ *		CMD		command and argument list
+ *		value		size in bytes
+ *		count		number of I/O operations
+ *
+ * NOTES:
+ *
+ * The application may be requesting smaller sized operations, which
+ * are being rounded up to the nearest sector size or UFS block size.
+ * To analyse what the application is requesting, DTraceToolkit programs
+ * such as Proc/fddist may help.
+ *
+ * SEE ALSO: seeksize.d, iosnoop
+ *
+ * COPYRIGHT: 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
+ *
+ * 31-Mar-2004	Brendan Gregg	Created this, build 51.
+ * 10-Oct-2004	   "      "	Rewrote to use the io provider, build 63.
+ * 18-Feb-2006	   "      "	Last update.
+ */
+
+#pragma D option quiet
+
+/*
+ * Print header
+ */
+dtrace:::BEGIN
+{
+	printf("Tracing... Hit Ctrl-C to end.\n");
+}
+
+/*
+ * Process io start
+ */
+io:::start
+{
+	/* fetch details */
+	this->size = args[0]->b_bcount;
+
+	/* store details */
+	@Size[pid, curpsinfo->pr_psargs] = quantize(this->size);
+}
+
+/*
+ * Print final report
+ */
+dtrace:::END
+{
+	printf("\n%8s  %s\n", "PID", "CMD");
+	printa("%8d  %S\n%@d\n", @Size);
+}