usr/src/cmd/dtrace/test/tst/common/rates/tst.aggrate.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  *   If the aggregation rate is set properly, there should be no aggregation
  32  *   drops.
  33  *
  34  * SECTION: Aggregations/Minimizing drops;
  35  *      Options and Tunables/aggrate;
  36  *      Options and Tunables/aggsize
  37  */
  38
  39 /*
  40  * We rely on the fact that at least 30 bytes must be stored per aggregation
  41  * iteration, but that no more than 300 bytes are stored per iteration.
  42  * We are going to let this run for ten seconds.  If the aggregation rate
  43  * is being set properly, there should be no aggregation drops.  Note that
  44  * this test (regrettably) may be scheduling sensitive -- but it should only
  45  * fail on the most pathological systems.
  46  */
  47 #pragma D option aggsize=300
  48 #pragma D option aggrate=10msec
  49 #pragma D option quiet
  50
  51 int n;
  52
  53 tick-100msec
  54 /n < 100/
  55 {
  56         @a[n++] = sum(n);
  57 }
  58
  59 tick-100msec
  60 /n == 100/
  61 {
  62         exit(0);
  63 }
  64
  65 END
  66 {
  67         printa("%10d\n", @a);
  68 }