xref: /onnv-gate/usr/src/cmd/dtrace/demo/struct/rwinfo.d (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate struct callinfo {
28*0Sstevel@tonic-gate 	uint64_t ts;      /* timestamp of last syscall entry */
29*0Sstevel@tonic-gate 	uint64_t elapsed; /* total elapsed time in nanoseconds */
30*0Sstevel@tonic-gate 	uint64_t calls;   /* number of calls made */
31*0Sstevel@tonic-gate 	size_t maxbytes;  /* maximum byte count argument */
32*0Sstevel@tonic-gate };
33*0Sstevel@tonic-gate 
34*0Sstevel@tonic-gate struct callinfo i[string];	/* declare i as an associative array */
35*0Sstevel@tonic-gate 
36*0Sstevel@tonic-gate syscall::read:entry, syscall::write:entry
37*0Sstevel@tonic-gate /pid == $1/
38*0Sstevel@tonic-gate {
39*0Sstevel@tonic-gate 	i[probefunc].ts = timestamp;
40*0Sstevel@tonic-gate 	i[probefunc].calls++;
41*0Sstevel@tonic-gate 	i[probefunc].maxbytes = arg2 > i[probefunc].maxbytes ?
42*0Sstevel@tonic-gate 		arg2 : i[probefunc].maxbytes;
43*0Sstevel@tonic-gate }
44*0Sstevel@tonic-gate 
45*0Sstevel@tonic-gate syscall::read:return, syscall::write:return
46*0Sstevel@tonic-gate /i[probefunc].ts != 0 && pid == $1/
47*0Sstevel@tonic-gate {
48*0Sstevel@tonic-gate 	i[probefunc].elapsed += timestamp - i[probefunc].ts;
49*0Sstevel@tonic-gate }
50*0Sstevel@tonic-gate 
51*0Sstevel@tonic-gate END
52*0Sstevel@tonic-gate {
53*0Sstevel@tonic-gate 	printf("        calls  max bytes  elapsed nsecs\n");
54*0Sstevel@tonic-gate 	printf("------  -----  ---------  -------------\n");
55*0Sstevel@tonic-gate 	printf("  read  %5d  %9d  %d\n",
56*0Sstevel@tonic-gate 	    i["read"].calls, i["read"].maxbytes, i["read"].elapsed);
57*0Sstevel@tonic-gate 	printf(" write  %5d  %9d  %d\n",
58*0Sstevel@tonic-gate 	    i["write"].calls, i["write"].maxbytes, i["write"].elapsed);
59*0Sstevel@tonic-gate }
60