1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * This D script is used as an example in the Solaris Dynamic Tracing Guide 27 * wiki in the "Structs and Unions" Chapter. 28 * 29 * The full text of the this chapter may be found here: 30 * 31 * http://wikis.sun.com/display/DTrace/Structs+and+Unions 32 * 33 * On machines that have DTrace installed, this script is available as 34 * rwinfo.d in /usr/demo/dtrace, a directory that contains all D scripts 35 * used in the Solaris Dynamic Tracing Guide. A table of the scripts and their 36 * corresponding chapters may be found here: 37 * 38 * file:///usr/demo/dtrace/index.html 39 */ 40 41 struct callinfo { 42 uint64_t ts; /* timestamp of last syscall entry */ 43 uint64_t elapsed; /* total elapsed time in nanoseconds */ 44 uint64_t calls; /* number of calls made */ 45 size_t maxbytes; /* maximum byte count argument */ 46 }; 47 48 struct callinfo i[string]; /* declare i as an associative array */ 49 50 syscall::read:entry, syscall::write:entry 51 /pid == $1/ 52 { 53 i[probefunc].ts = timestamp; 54 i[probefunc].calls++; 55 i[probefunc].maxbytes = arg2 > i[probefunc].maxbytes ? 56 arg2 : i[probefunc].maxbytes; 57 } 58 59 syscall::read:return, syscall::write:return 60 /i[probefunc].ts != 0 && pid == $1/ 61 { 62 i[probefunc].elapsed += timestamp - i[probefunc].ts; 63 } 64 65 END 66 { 67 printf(" calls max bytes elapsed nsecs\n"); 68 printf("------ ----- --------- -------------\n"); 69 printf(" read %5d %9d %d\n", 70 i["read"].calls, i["read"].maxbytes, i["read"].elapsed); 71 printf(" write %5d %9d %d\n", 72 i["write"].calls, i["write"].maxbytes, i["write"].elapsed); 73 } 74