convert-blockstatus (2044B)
1 #!/bin/bash 2 # 3 # Test lseek influence on qcow2 block-status 4 # 5 # Block layer may recursively check block_status in file child of qcow2, if 6 # qcow2 driver returned DATA. There are several test cases to check influence 7 # of lseek on block_status performance. To see real difference run on tmpfs. 8 # 9 # Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved. 10 # 11 # Tests originally written by Kevin Wolf 12 # 13 # This program is free software; you can redistribute it and/or modify 14 # it under the terms of the GNU General Public License as published by 15 # the Free Software Foundation; either version 2 of the License, or 16 # (at your option) any later version. 17 # 18 # This program is distributed in the hope that it will be useful, 19 # but WITHOUT ANY WARRANTY; without even the implied warranty of 20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 # GNU General Public License for more details. 22 # 23 # You should have received a copy of the GNU General Public License 24 # along with this program. If not, see <http://www.gnu.org/licenses/>. 25 # 26 27 if [ "$#" -lt 1 ]; then 28 echo "Usage: $0 SOURCE_FILE" 29 exit 1 30 fi 31 32 ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )" 33 QEMU_IMG="$ROOT_DIR/qemu-img" 34 QEMU_IO="$ROOT_DIR/qemu-io" 35 36 size=1G 37 src="$1" 38 39 # test-case plain 40 41 ( 42 $QEMU_IMG create -f qcow2 "$src" $size 43 for i in $(seq 16384 -1 0); do 44 echo "write $((i * 65536)) 64k" 45 done | $QEMU_IO "$src" 46 ) > /dev/null 47 48 echo -n "plain: " 49 /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// 50 51 # test-case forward 52 53 ( 54 $QEMU_IMG create -f qcow2 "$src" $size 55 for i in $(seq 0 2 16384); do 56 echo "write $((i * 65536)) 64k" 57 done | $QEMU_IO "$src" 58 for i in $(seq 1 2 16384); do 59 echo "write $((i * 65536)) 64k" 60 done | $QEMU_IO "$src" 61 ) > /dev/null 62 63 echo -n "forward: " 64 /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// 65 66 # test-case prealloc 67 68 $QEMU_IMG create -f qcow2 -o preallocation=metadata "$src" $size > /dev/null 69 70 echo -n "prealloc: " 71 /usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co://