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72 lines
2.0 KiB
Bash
72 lines
2.0 KiB
Bash
#!/bin/bash
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#
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# Test lseek influence on qcow2 block-status
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#
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# Block layer may recursively check block_status in file child of qcow2, if
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# qcow2 driver returned DATA. There are several test cases to check influence
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# of lseek on block_status performance. To see real difference run on tmpfs.
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#
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# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved.
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#
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# Tests originally written by Kevin Wolf
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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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if [ "$#" -lt 1 ]; then
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echo "Usage: $0 SOURCE_FILE"
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exit 1
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fi
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ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )"
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QEMU_IMG="$ROOT_DIR/qemu-img"
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QEMU_IO="$ROOT_DIR/qemu-io"
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size=1G
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src="$1"
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# test-case plain
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(
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$QEMU_IMG create -f qcow2 "$src" $size
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for i in $(seq 16384 -1 0); do
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echo "write $((i * 65536)) 64k"
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done | $QEMU_IO "$src"
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) > /dev/null
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echo -n "plain: "
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/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co://
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# test-case forward
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(
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$QEMU_IMG create -f qcow2 "$src" $size
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for i in $(seq 0 2 16384); do
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echo "write $((i * 65536)) 64k"
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done | $QEMU_IO "$src"
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for i in $(seq 1 2 16384); do
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echo "write $((i * 65536)) 64k"
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done | $QEMU_IO "$src"
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) > /dev/null
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echo -n "forward: "
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/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co://
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# test-case prealloc
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$QEMU_IMG create -f qcow2 -o preallocation=metadata "$src" $size > /dev/null
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echo -n "prealloc: "
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/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co://
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