common.pattern

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2009 Red Hat, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19 function do_is_allocated() {
  20     local start=$1
  21     local size=$(( $2 / 512))
  22     local step=$3
  23     local count=$4
  24
  25     for i in `seq 1 $count`; do
  26         echo alloc $(( start + i * step )) $size
  27     done
  28 }
  29
  30 function is_allocated() {
  31     do_is_allocated "$@" | $QEMU_IO $TEST_IMG | _filter_qemu_io
  32 }
  33
  34 function do_io() {
  35     local op=$1
  36     local start=$2
  37     local size=$3
  38     local step=$4
  39     local count=$5
  40     local pattern=$6
  41
  42     echo === IO: pattern $pattern >&2
  43     for i in `seq 1 $count`; do
  44         echo $op -P $pattern $(( start + i * step )) $size
  45     done
  46 }
  47
  48 function io_pattern() {
  49     do_io "$@" | $QEMU_IO $TEST_IMG | _filter_qemu_io
  50 }
  51
  52 function io() {
  53     local start=$2
  54     local pattern=$(( (start >> 9) % 256 ))
  55
  56     do_io "$@" $pattern | $QEMU_IO $TEST_IMG | _filter_qemu_io
  57 }
  58
  59 function io_zero() {
  60     do_io "$@" 0 | $QEMU_IO $TEST_IMG | _filter_qemu_io
  61 }
  62
  63 function io_test() {
  64     local op=$1
  65     local offset=$2
  66     local cluster_size=$3
  67
  68     local num_large=$4
  69     local num_medium=$((num_large * num_large))
  70     local num_small=$((4 * num_medium))
  71
  72     local half_cluster=$((cluster_size / 2))
  73     local quarter_cluster=$((cluster_size / 4))
  74     local l2_size=$((cluster_size * cluster_size / 8))
  75
  76     # Complete clusters
  77     io "$op" $offset $cluster_size $cluster_size $num_small
  78     offset=$((offset + num_small * $cluster_size))
  79
  80     # From somewhere in the middle to the end of a cluster
  81     io "$op" $((offset + $half_cluster)) $half_cluster $cluster_size $num_small
  82     offset=$((offset + num_small * $cluster_size))
  83
  84     # From the start to somewhere in the middle of a cluster
  85     io "$op" $offset $half_cluster $cluster_size $num_small
  86     offset=$((offset + num_small * $cluster_size))
  87
  88     # Completely misaligned (and small)
  89     io "$op" $((offset + $quarter_cluster)) $half_cluster $cluster_size $num_small
  90     offset=$((offset + num_small * $cluster_size))
  91
  92     # Spanning multiple clusters
  93     io "$op" $((offset + $half_cluster)) $((cluster_size * 2)) $((cluster_size * 3)) $num_medium
  94     offset=$((offset + num_medium * 3 * $cluster_size))
  95
  96     # Spanning multiple L2 tables
  97     # L2 table size: 512 clusters of 4k = 2M
  98     offset=$(( ((offset + l2_size - 1) & ~(l2_size - 1)) - (3 * half_cluster) ))
  99     io "$op" $offset $((6 * half_cluster)) $(( l2_size + half_cluster )) $num_large
 100     offset=$((offset + num_large * ( l2_size + half_cluster )))
 101 }
 102
 103 function io_test2() {
 104     local orig_offset=$1
 105     local cluster_size=$2
 106     local num=$3
 107
 108     # Pattern (repeat after 9 clusters):
 109     #   used - used - free - used - compressed - compressed -
 110     #   free - free - compressed
 111
 112     # Write the clusters to be compressed
 113     echo === Clusters to be compressed [1]
 114     io_pattern writev $((offset + 4 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 115     echo === Clusters to be compressed [2]
 116     io_pattern writev $((offset + 5 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 117     echo === Clusters to be compressed [3]
 118     io_pattern writev $((offset + 8 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 119
 120     mv $TEST_IMG $TEST_IMG.orig
 121     $QEMU_IMG convert -f $IMGFMT -O $IMGFMT -c $TEST_IMG.orig $TEST_IMG
 122
 123     # Write the used clusters
 124     echo === Used clusters [1]
 125     io_pattern writev $((offset + 0 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 126     echo === Used clusters [2]
 127     io_pattern writev $((offset + 1 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 128     echo === Used clusters [3]
 129     io_pattern writev $((offset + 3 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
 130
 131     # Read them
 132     echo === Read used/compressed clusters
 133     io_pattern readv $((offset + 0 * $cluster_size)) $((2 * $cluster_size)) $((9 * $cluster_size)) $num 165
 134     io_pattern readv $((offset + 3 * $cluster_size)) $((3 * $cluster_size)) $((9 * $cluster_size)) $num 165
 135     io_pattern readv $((offset + 8 * $cluster_size)) $((1 * $cluster_size)) $((9 * $cluster_size)) $num 165
 136
 137     echo === Read zeros
 138     io_zero readv $((offset + 2 * $cluster_size)) $((1 * $cluster_size)) $((9 * $cluster_size)) $num
 139     io_zero readv $((offset + 6 * $cluster_size)) $((2 * $cluster_size)) $((9 * $cluster_size)) $num
 140 }