usr/src/cmd/dtrace/test/tst/common/docsExamples/rwinfo.d

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * ASSERTION:
  31  *      Verify doc example 7-1
  32  *
  33  * SECTION:
  34  *      DocExamples/rwinfo
  35  */
  36
  37
  38 #pragma D option quiet
  39
  40 struct callinfo {
  41         uint64_t ts;
  42         uint64_t elapsed;
  43         uint64_t calls;
  44         size_t maxbytes;
  45 };
  46
  47 struct callinfo i[string];
  48
  49 syscall::read:entry,
  50 syscall::write:entry
  51 /pid == 100551/
  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,
  60 syscall::write:return
  61 /i[probefunc].ts != 0 && pid == 100551/
  62 {
  63         i[probefunc].elapsed += timestamp - i[probefunc].ts;
  64 }
  65
  66 END
  67 {
  68         printf("      calls  max bytes  elapsed nsecs\n");
  69         printf("-----  -----  ---------  -------------\n");
  70         printf("   read %5d  %9d   %d\n", i["read"].calls,
  71             i["read"].maxbytes, i["read"].elapsed);
  72         printf("   write %5d  %9d   %d\n", i["write"].calls,
  73             i["write"].maxbytes, i["write"].elapsed);
  74 }