141 lines
4.8 KiB
Bash
141 lines
4.8 KiB
Bash
#!/bin/bash
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#
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# Copyright (C) 2009 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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function do_is_allocated() {
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local start=$1
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local size=$(( $2 / 512))
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local step=$3
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local count=$4
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for i in `seq 1 $count`; do
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echo alloc $(( start + (i - 1) * step )) $size
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done
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}
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function is_allocated() {
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do_is_allocated "$@" | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
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}
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function do_io() {
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local op=$1
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local start=$2
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local size=$3
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local step=$4
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local count=$5
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local pattern=$6
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echo === IO: pattern $pattern >&2
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for i in `seq 1 $count`; do
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echo $op -P $pattern $(( start + (i - 1) * step )) $size
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done
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}
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function io_pattern() {
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do_io "$@" | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
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}
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function io() {
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local start=$2
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local pattern=$(( (start >> 9) % 256 ))
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do_io "$@" $pattern | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
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}
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function io_zero() {
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do_io "$@" 0 | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
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}
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function io_test() {
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local op=$1
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local offset=$2
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local cluster_size=$3
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local num_large=$4
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local num_medium=$((num_large * num_large))
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local num_small=$((4 * num_medium))
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local half_cluster=$((cluster_size / 2))
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local quarter_cluster=$((cluster_size / 4))
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local l2_size=$((cluster_size * cluster_size / 8))
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# Complete clusters
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io "$op" $offset $cluster_size $cluster_size $num_small
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offset=$((offset + num_small * $cluster_size))
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# From somewhere in the middle to the end of a cluster
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io "$op" $((offset + $half_cluster)) $half_cluster $cluster_size $num_small
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offset=$((offset + num_small * $cluster_size))
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# From the start to somewhere in the middle of a cluster
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io "$op" $offset $half_cluster $cluster_size $num_small
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offset=$((offset + num_small * $cluster_size))
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# Completely misaligned (and small)
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io "$op" $((offset + $quarter_cluster)) $half_cluster $cluster_size $num_small
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offset=$((offset + num_small * $cluster_size))
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# Spanning multiple clusters
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io "$op" $((offset + $half_cluster)) $((cluster_size * 2)) $((cluster_size * 3)) $num_medium
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offset=$((offset + num_medium * 3 * $cluster_size))
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# Spanning multiple L2 tables
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# L2 table size: 512 clusters of 4k = 2M
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offset=$(( ((offset + l2_size - 1) & ~(l2_size - 1)) - (3 * half_cluster) ))
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io "$op" $offset $((6 * half_cluster)) $(( l2_size + half_cluster )) $num_large
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offset=$((offset + num_large * ( l2_size + half_cluster )))
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}
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function io_test2() {
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local orig_offset=$1
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local cluster_size=$2
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local num=$3
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# Pattern (repeat after 9 clusters):
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# used - used - free - used - compressed - compressed -
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# free - free - compressed
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# Write the clusters to be compressed
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echo === Clusters to be compressed [1]
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io_pattern writev $((offset + 4 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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echo === Clusters to be compressed [2]
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io_pattern writev $((offset + 5 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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echo === Clusters to be compressed [3]
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io_pattern writev $((offset + 8 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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mv "$TEST_IMG" "$TEST_IMG.orig"
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$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -c "$TEST_IMG.orig" "$TEST_IMG"
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# Write the used clusters
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echo === Used clusters [1]
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io_pattern writev $((offset + 0 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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echo === Used clusters [2]
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io_pattern writev $((offset + 1 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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echo === Used clusters [3]
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io_pattern writev $((offset + 3 * $cluster_size)) $cluster_size $((9 * $cluster_size)) $num 165
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# Read them
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echo === Read used/compressed clusters
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io_pattern readv $((offset + 0 * $cluster_size)) $((2 * $cluster_size)) $((9 * $cluster_size)) $num 165
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io_pattern readv $((offset + 3 * $cluster_size)) $((3 * $cluster_size)) $((9 * $cluster_size)) $num 165
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io_pattern readv $((offset + 8 * $cluster_size)) $((1 * $cluster_size)) $((9 * $cluster_size)) $num 165
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echo === Read zeros
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io_zero readv $((offset + 2 * $cluster_size)) $((1 * $cluster_size)) $((9 * $cluster_size)) $num
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io_zero readv $((offset + 6 * $cluster_size)) $((2 * $cluster_size)) $((9 * $cluster_size)) $num
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}
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