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 27if [ "$#" -lt 1 ]; then 28 echo "Usage: $0 SOURCE_FILE" 29 exit 1 30fi 31 32ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )" 33QEMU_IMG="$ROOT_DIR/qemu-img" 34QEMU_IO="$ROOT_DIR/qemu-io" 35 36size=1G 37src="$1" 38 39# test-case plain 40 41( 42$QEMU_IMG create -f qcow2 "$src" $size 43for i in $(seq 16384 -1 0); do 44 echo "write $((i * 65536)) 64k" 45done | $QEMU_IO "$src" 46) > /dev/null 47 48echo -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 55for i in $(seq 0 2 16384); do 56 echo "write $((i * 65536)) 64k" 57done | $QEMU_IO "$src" 58for i in $(seq 1 2 16384); do 59 echo "write $((i * 65536)) 64k" 60done | $QEMU_IO "$src" 61) > /dev/null 62 63echo -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 70echo -n "prealloc: " 71/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co://