From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: mreitz@redhat.com, kwolf@redhat.com, fam@euphon.net, stefanha@redhat.com, eblake@redhat.com, den@openvz.org, vsementsov@virtuozzo.com Subject: [Qemu-devel] [PATCH v2 1/2] tests/perf: Test lseek influence on qcow2 block-status Date: Mon, 8 Apr 2019 19:26:16 +0300 [thread overview] Message-ID: <20190408162617.258535-2-vsementsov@virtuozzo.com> (raw) In-Reply-To: <20190408162617.258535-1-vsementsov@virtuozzo.com> Block layer may recursively check block_status in file child of qcow2, if qcow2 driver returned DATA. There are several test cases to check influence of lseek on block_status performance. To see real difference run on tmpfs. Tests originally created by Kevin, I just refactored and put them together into one executable file with simple output. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- tests/perf/block/qcow2/convert-blockstatus | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100755 tests/perf/block/qcow2/convert-blockstatus diff --git a/tests/perf/block/qcow2/convert-blockstatus b/tests/perf/block/qcow2/convert-blockstatus new file mode 100755 index 0000000000..a1a3c1ef43 --- /dev/null +++ b/tests/perf/block/qcow2/convert-blockstatus @@ -0,0 +1,71 @@ +#!/bin/bash +# +# Test lseek influence on qcow2 block-status +# +# Block layer may recursively check block_status in file child of qcow2, if +# qcow2 driver returned DATA. There are several test cases to check influence +# of lseek on block_status performance. To see real difference run on tmpfs. +# +# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved. +# +# Tests originally written by Kevin Wolf +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +if [ "$#" -lt 1 ]; then + echo "Usage: $0 SOURCE_FILE" + exit 1 +fi + +ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )" +QEMU_IMG="$ROOT_DIR/qemu-img" +QEMU_IO="$ROOT_DIR/qemu-io" + +size=1G +src="$1" + +# test-case plain + +( +$QEMU_IMG create -f qcow2 "$src" $size +for i in $(seq 16384 -1 0); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +) > /dev/null + +echo -n "plain: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// + +# test-case forward + +( +$QEMU_IMG create -f qcow2 "$src" $size +for i in $(seq 0 2 16384); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +for i in $(seq 1 2 16384); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +) > /dev/null + +echo -n "forward: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// + +# test-case prealloc + +$QEMU_IMG create -f qcow2 -o preallocation=metadata "$src" $size > /dev/null + +echo -n "prealloc: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// -- 2.18.0
WARNING: multiple messages have this Message-ID (diff)
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Subject: [Qemu-devel] [PATCH v2 1/2] tests/perf: Test lseek influence on qcow2 block-status Date: Mon, 8 Apr 2019 19:26:16 +0300 [thread overview] Message-ID: <20190408162617.258535-2-vsementsov@virtuozzo.com> (raw) Message-ID: <20190408162616.c5dGU08gpACcv6lK3jhoJCyzhG1kCNXFU0R66UTBXZQ@z> (raw) In-Reply-To: <20190408162617.258535-1-vsementsov@virtuozzo.com> Block layer may recursively check block_status in file child of qcow2, if qcow2 driver returned DATA. There are several test cases to check influence of lseek on block_status performance. To see real difference run on tmpfs. Tests originally created by Kevin, I just refactored and put them together into one executable file with simple output. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- tests/perf/block/qcow2/convert-blockstatus | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100755 tests/perf/block/qcow2/convert-blockstatus diff --git a/tests/perf/block/qcow2/convert-blockstatus b/tests/perf/block/qcow2/convert-blockstatus new file mode 100755 index 0000000000..a1a3c1ef43 --- /dev/null +++ b/tests/perf/block/qcow2/convert-blockstatus @@ -0,0 +1,71 @@ +#!/bin/bash +# +# Test lseek influence on qcow2 block-status +# +# Block layer may recursively check block_status in file child of qcow2, if +# qcow2 driver returned DATA. There are several test cases to check influence +# of lseek on block_status performance. To see real difference run on tmpfs. +# +# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved. +# +# Tests originally written by Kevin Wolf +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +if [ "$#" -lt 1 ]; then + echo "Usage: $0 SOURCE_FILE" + exit 1 +fi + +ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../../../.." >/dev/null 2>&1 && pwd )" +QEMU_IMG="$ROOT_DIR/qemu-img" +QEMU_IO="$ROOT_DIR/qemu-io" + +size=1G +src="$1" + +# test-case plain + +( +$QEMU_IMG create -f qcow2 "$src" $size +for i in $(seq 16384 -1 0); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +) > /dev/null + +echo -n "plain: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// + +# test-case forward + +( +$QEMU_IMG create -f qcow2 "$src" $size +for i in $(seq 0 2 16384); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +for i in $(seq 1 2 16384); do + echo "write $((i * 65536)) 64k" +done | $QEMU_IO "$src" +) > /dev/null + +echo -n "forward: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// + +# test-case prealloc + +$QEMU_IMG create -f qcow2 -o preallocation=metadata "$src" $size > /dev/null + +echo -n "prealloc: " +/usr/bin/time -f %e $QEMU_IMG convert -n "$src" null-co:// -- 2.18.0
next prev parent reply other threads:[~2019-04-08 16:26 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-08 16:26 [Qemu-devel] [PATCH v2 for 4.1 0/2] avoid lseek on block_status Vladimir Sementsov-Ogievskiy 2019-04-08 16:26 ` Vladimir Sementsov-Ogievskiy 2019-04-08 16:26 ` Vladimir Sementsov-Ogievskiy [this message] 2019-04-08 16:26 ` [Qemu-devel] [PATCH v2 1/2] tests/perf: Test lseek influence on qcow2 block-status Vladimir Sementsov-Ogievskiy 2019-04-08 16:26 ` [Qemu-devel] [PATCH v2 2/2] block: avoid recursive block_status call if possible Vladimir Sementsov-Ogievskiy 2019-04-08 16:26 ` Vladimir Sementsov-Ogievskiy 2019-05-22 10:32 ` Kevin Wolf 2019-05-27 15:13 ` Max Reitz 2019-05-28 6:39 ` Vladimir Sementsov-Ogievskiy 2019-05-28 15:47 ` Max Reitz 2019-04-22 9:58 ` [Qemu-devel] [PATCH v2 for 4.1 0/2] avoid lseek on block_status Vladimir Sementsov-Ogievskiy 2019-04-22 9:58 ` Vladimir Sementsov-Ogievskiy 2019-05-06 15:14 ` Vladimir Sementsov-Ogievskiy 2019-05-21 7:50 ` [Qemu-devel] ping " Vladimir Sementsov-Ogievskiy 2019-05-22 10:47 ` [Qemu-devel] " Kevin Wolf 2019-05-22 11:30 ` Vladimir Sementsov-Ogievskiy
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