usr/src/cmd/dtrace/test/tst/common/pragma/tst.temporal2.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # This file and its contents are supplied under the terms of the
   6 # Common Development and Distribution License ("CDDL"), version 1.0.
   7 # You may only use this file in accordance with the terms of version
   8 # 1.0 of the CDDL.
   9 #
  10 # A full copy of the text of the CDDL should have accompanied this
  11 # source.  A copy of the CDDL is also available via the Internet at
  12 # http://www.illumos.org/license/CDDL.
  13 #
  14 # CDDL HEADER END
  15 #
  16
  17 #
  18 # Copyright (c) 2012 by Delphix. All rights reserved.
  19 #
  20
  21 ############################################################################
  22 # ASSERTION:
  23 #       temporal option causes output to be sorted, even when some
  24 #       buffers are empty
  25 #
  26 # SECTION: Pragma
  27 #
  28 # NOTES: The temporal option has no effect on a single-CPU system, so
  29 #    this needs to be run on a multi-CPU system to effectively test the
  30 #    temporal option.
  31 #
  32 ############################################################################
  33
  34 if [ $# != 1 ]; then
  35         echo expected one argument: '<'dtrace-path'>'
  36         exit 2
  37 fi
  38
  39 dtrace=$1
  40 file=/tmp/out.$$
  41
  42 rm -f $file
  43
  44 $dtrace -o $file -s /dev/stdin <<EOF
  45         #pragma D option quiet
  46         #pragma D option destructive
  47         #pragma D option temporal
  48         #pragma D option switchrate=1000hz
  49
  50         /*
  51          * Use two enablings of the same probe, so that cpu 0 will always
  52          * record its data just a little bit before the other cpus.
  53          * We don't want to use the chill() action in the same enabling
  54          * that we record the timestamp, because chill() causes the
  55          * timestamp to be re-read, and thus not match the timestamp
  56          * which libdtrace uses to sort the records.
  57          */
  58
  59         profile-401
  60         /cpu == 0/
  61         {
  62                 printf("%d\n", timestamp);
  63         }
  64
  65         profile-401
  66         /cpu != 0/
  67         {
  68                 chill(1000); /* one microsecond */
  69         }
  70
  71         profile-401
  72         /cpu != 0/
  73         {
  74                 printf("%d\n", timestamp);
  75         }
  76
  77         tick-1s
  78         /k++ == 10/
  79         {
  80                 printf("%d\n", timestamp);
  81                 exit(0);
  82         }
  83 EOF
  84
  85 status=$?
  86 if [ "$status" -ne 0 ]; then
  87         echo $tst: dtrace failed
  88         exit $status
  89 fi
  90
  91 # dtrace outputs a blank line at the end, which will sort to the beginning,
  92 # so use grep to remove the blank line.
  93 head -n -1 $file > $file.2
  94
  95 sort -n $file.2 | diff $file.2 -
  96 status=$?
  97 if [ "$status" -ne 0 ]; then
  98         echo $tst: output is not sorted
  99         exit $status
 100 fi
 101
 102 exit $status