tests/perf/block/qcow2/convert-blockstatus

   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://