usr/src/cmd/dtrace/test/tst/common/docsExamples/rtime.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 3-1
  32  *
  33  * SECTION:
  34  *      DocExamples/rtime
  35  */
  36
  37
  38 #pragma D option quiet
  39
  40 syscall::read:entry
  41 {
  42         self->t = timestamp;
  43 }
  44
  45 syscall::read:return
  46 /self->t != 0/
  47 {
  48         printf("%d/%d spent %d nsecs in read(2)\n", pid,
  49             tid, timestamp - self->t);
  50 }