rwbytype.d revision 285830 
1#!/usr/sbin/dtrace -s
2/*
3 * rwbytype.d - read/write bytes by vnode type.
4 *              Written using DTrace (Solaris 10 3/05).
5 *
6 * This program identifies the vnode type of read/write activity - whether
7 * that is for regular files, sockets, character special devices, etc.
8 *
9 * $Id: rwbytype.d 3 2007-08-01 10:50:08Z brendan $
10 *
11 * USAGE:       rwbytype.d    # hit Ctrl-C to end sample
12 *
13 * FIELDS:
14 *		PID		number of rwbytype
15 *		CMD		process name
16 *		VTYPE		vnode type (describes I/O type)
17 *		DIR		direction (Read/Write)
18 *		BYTES		bytes transferred
19 *
20 * COPYRIGHT: Copyright (c) 2005, 2006 Brendan Gregg.
21 *
22 * CDDL HEADER START
23 *
24 *  The contents of this file are subject to the terms of the
25 *  Common Development and Distribution License, Version 1.0 only
26 *  (the "License").  You may not use this file except in compliance
27 *  with the License.
28 *
29 *  You can obtain a copy of the license at Docs/cddl1.txt
30 *  or http://www.opensolaris.org/os/licensing.
31 *  See the License for the specific language governing permissions
32 *  and limitations under the License.
33 *
34 * CDDL HEADER END
35 *
36 * 18-Oct-2005  Brendan Gregg   Created this.
37 * 20-Apr-2006	   "      "	Last update.
38 */
39
40#pragma D option quiet
41
42typedef struct vtype2str {
43	string code;
44};
45
46translator struct vtype2str < int T > {
47	/* the order has been picked for performance reasons */
48	code =
49	    T == 1 ? "reg"   :
50	    T == 9 ? "sock"  :
51	    T == 4 ? "chr"   :
52	    T == 6 ? "fifo"  :
53	    T == 8 ? "proc"  :
54	    T == 2 ? "dir"   :
55	    T == 3 ? "blk"   :
56	    T == 5 ? "lnk"   :
57	    T == 7 ? "door"  :
58	    T == 10 ? "port" :
59	    T == 11 ? "bad"  : "non";
60};
61
62dtrace:::BEGIN
63{
64	printf("Tracing... Hit Ctrl-C to end.\n");
65}
66
67fbt::fop_read:entry,
68fbt::fop_write:entry
69{
70	self->type = xlate <struct vtype2str *>(args[0]->v_type)->code;
71	self->size = args[1]->uio_resid;
72	self->uiop = args[1];
73}
74
75fbt::fop_read:return
76/self->uiop/
77{
78	this->resid = self->uiop->uio_resid;
79	@bytes[pid, execname, self->type, "R"] = sum(self->size - this->resid);
80	self->type = 0;
81	self->size = 0;
82	self->uiop = 0;
83}
84
85/* this is delibrately redundant code for performance reasons */
86fbt::fop_write:return
87/self->uiop/
88{
89	this->resid = self->uiop->uio_resid;
90	@bytes[pid, execname, self->type, "W"] = sum(self->size - this->resid);
91	self->type = 0;
92	self->size = 0;
93	self->uiop = 0;
94}
95
96dtrace:::END
97{
98	printf("%-6s %-16s %6s %4s %9s\n",
99	    "PID", "CMD", "VTYPE", "DIR", "BYTES");
100	printa("%-6d %-16s %6s %4s %@9d\n", @bytes);
101}
102