mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
d04c155503
In the "Overlapping multiple requests" cases, the 3rd reqs (the break
point B) doesn't wait for the 2nd, and once resumed the I/O will just
continue. This is because the 2nd is already waiting for the 1st, and
in wait_serialising_requests() there is:
/* If the request is already (indirectly) waiting for us, or
* will wait for us as soon as it wakes up, then just go on
* (instead of producing a deadlock in the former case). */
if (!req->waiting_for) {
/* actually break */
...
}
Consequently, the following "sleep 100; resume A" command races with the
completion of that request, and sometimes results in an unexpected
order of output:
> @@ -56,9 +56,9 @@
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> blkdebug: Resuming request 'B'
> +blkdebug: Resuming request 'A'
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -blkdebug: Resuming request 'A'
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> wrote XXX/XXX bytes at offset XXX
Filter out the "Resuming request" lines to make the output
deterministic.
Reported-by: Patchew <no-reply@patchew.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 20171113150026.4743-1-famz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
268 lines
5.5 KiB
Bash
Executable file
268 lines
5.5 KiB
Bash
Executable file
#!/bin/bash
|
|
#
|
|
# Test concurrent pread/pwrite
|
|
#
|
|
# Copyright (C) 2014 Red Hat, Inc.
|
|
#
|
|
# 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/>.
|
|
#
|
|
|
|
# creator
|
|
owner=kwolf@redhat.com
|
|
|
|
seq=`basename $0`
|
|
echo "QA output created by $seq"
|
|
|
|
here=`pwd`
|
|
status=1 # failure is the default!
|
|
|
|
_cleanup()
|
|
{
|
|
_cleanup_test_img
|
|
}
|
|
trap "_cleanup; exit \$status" 0 1 2 3 15
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common.rc
|
|
. ./common.filter
|
|
|
|
_supported_fmt raw
|
|
_supported_proto generic
|
|
_supported_os Linux
|
|
|
|
CLUSTER_SIZE=4k
|
|
size=128M
|
|
|
|
_make_test_img $size
|
|
|
|
echo
|
|
echo "== Some concurrent requests involving RMW =="
|
|
|
|
function test_io()
|
|
{
|
|
echo "open -o driver=$IMGFMT,file.align=4k blkdebug::$TEST_IMG"
|
|
# A simple RMW request
|
|
cat <<EOF
|
|
aio_write -P 10 0x200 0x200
|
|
aio_flush
|
|
EOF
|
|
|
|
# Sequential RMW requests on the same physical sector
|
|
off=0x1000
|
|
for ev in "head" "after_head"; do
|
|
cat <<EOF
|
|
break pwritev_rmw_$ev A
|
|
aio_write -P 10 $((off + 0x200)) 0x200
|
|
wait_break A
|
|
aio_write -P 11 $((off + 0x400)) 0x200
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
off=$((off + 0x1000))
|
|
done
|
|
|
|
# Chained dependencies
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0x5000 0x200
|
|
wait_break A
|
|
aio_write -P 11 0x5200 0x200
|
|
aio_write -P 12 0x5400 0x200
|
|
aio_write -P 13 0x5600 0x200
|
|
aio_write -P 14 0x5800 0x200
|
|
aio_write -P 15 0x5a00 0x200
|
|
aio_write -P 16 0x5c00 0x200
|
|
aio_write -P 17 0x5e00 0x200
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
|
|
# Overlapping multiple requests
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0x6000 0x200
|
|
wait_break A
|
|
break pwritev_rmw_after_head B
|
|
aio_write -P 10 0x7e00 0x200
|
|
wait_break B
|
|
aio_write -P 11 0x6800 0x1000
|
|
resume A
|
|
sleep 100
|
|
resume B
|
|
aio_flush
|
|
EOF
|
|
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0x8000 0x200
|
|
wait_break A
|
|
break pwritev_rmw_after_head B
|
|
aio_write -P 10 0x9e00 0x200
|
|
wait_break B
|
|
aio_write -P 11 0x8800 0x1000
|
|
resume B
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0xa000 0x200
|
|
wait_break A
|
|
aio_write -P 11 0xa800 0x1000
|
|
break pwritev_rmw_after_head B
|
|
aio_write -P 10 0xbe00 0x200
|
|
wait_break B
|
|
resume A
|
|
sleep 100
|
|
resume B
|
|
aio_flush
|
|
EOF
|
|
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0xc000 0x200
|
|
wait_break A
|
|
aio_write -P 11 0xc800 0x1000
|
|
break pwritev_rmw_after_head B
|
|
aio_write -P 10 0xde00 0x200
|
|
wait_break B
|
|
resume B
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
|
|
# Only RMW for the tail part
|
|
cat <<EOF
|
|
break pwritev_rmw_after_tail A
|
|
aio_write -P 10 0xe000 0x1800
|
|
wait_break A
|
|
aio_write -P 11 0xf000 0xc00
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
|
|
cat <<EOF
|
|
break pwritev A
|
|
aio_write -P 10 0x10000 0x800
|
|
wait_break A
|
|
break pwritev_rmw_after_tail B
|
|
aio_write -P 11 0x10000 0x400
|
|
break pwritev_done C
|
|
resume A
|
|
wait_break C
|
|
resume C
|
|
sleep 100
|
|
wait_break B
|
|
resume B
|
|
aio_flush
|
|
EOF
|
|
|
|
cat <<EOF
|
|
break pwritev A
|
|
aio_write -P 10 0x11000 0x800
|
|
wait_break A
|
|
aio_write -P 11 0x11000 0x1000
|
|
sleep 100
|
|
resume A
|
|
aio_flush
|
|
EOF
|
|
}
|
|
|
|
test_io | $QEMU_IO | _filter_qemu_io | \
|
|
sed -e 's,[0-9/]* bytes at offset [0-9]*,XXX/XXX bytes at offset XXX,g' \
|
|
-e 's/^[0-9]* \(bytes\|KiB\)/XXX bytes/' \
|
|
-e '/Suspended/d' \
|
|
-e '/blkdebug: Resuming request/d'
|
|
|
|
echo
|
|
echo "== Verify image content =="
|
|
|
|
function verify_io()
|
|
{
|
|
# A simple RMW request
|
|
echo read -P 0 0 0x200
|
|
echo read -P 10 0x200 0x200
|
|
echo read -P 0 0x400 0xc00
|
|
|
|
# Sequential RMW requests on the same physical sector
|
|
echo read -P 0 0x1000 0x200
|
|
echo read -P 10 0x1200 0x200
|
|
echo read -P 11 0x1400 0x200
|
|
echo read -P 0 0x1600 0xa00
|
|
|
|
echo read -P 0 0x2000 0x200
|
|
echo read -P 10 0x2200 0x200
|
|
echo read -P 11 0x2400 0x200
|
|
echo read -P 0 0x2600 0xa00
|
|
|
|
# Chained dependencies
|
|
echo read -P 10 0x5000 0x200
|
|
echo read -P 11 0x5200 0x200
|
|
echo read -P 12 0x5400 0x200
|
|
echo read -P 13 0x5600 0x200
|
|
echo read -P 14 0x5800 0x200
|
|
echo read -P 15 0x5a00 0x200
|
|
echo read -P 16 0x5c00 0x200
|
|
echo read -P 17 0x5e00 0x200
|
|
|
|
# Overlapping multiple requests
|
|
echo read -P 10 0x6000 0x200
|
|
echo read -P 0 0x6200 0x600
|
|
echo read -P 11 0x6800 0x1000
|
|
echo read -P 0 0x7800 0x600
|
|
echo read -P 10 0x7e00 0x200
|
|
|
|
echo read -P 10 0x8000 0x200
|
|
echo read -P 0 0x8200 0x600
|
|
echo read -P 11 0x8800 0x1000
|
|
echo read -P 0 0x9800 0x600
|
|
echo read -P 10 0x9e00 0x200
|
|
|
|
echo read -P 10 0xa000 0x200
|
|
echo read -P 0 0xa200 0x600
|
|
echo read -P 11 0xa800 0x1000
|
|
echo read -P 0 0xb800 0x600
|
|
echo read -P 10 0xbe00 0x200
|
|
|
|
echo read -P 10 0xc000 0x200
|
|
echo read -P 0 0xc200 0x600
|
|
echo read -P 11 0xc800 0x1000
|
|
echo read -P 0 0xd800 0x600
|
|
echo read -P 10 0xde00 0x200
|
|
|
|
# Only RMW for the tail part
|
|
echo read -P 10 0xe000 0x1000
|
|
echo read -P 11 0xf800 0x400
|
|
echo read -P 0 0xfc00 0x400
|
|
|
|
echo read -P 11 0x10000 0x400
|
|
echo read -P 10 0x10400 0x400
|
|
|
|
echo read -P 11 0x11800 0x800
|
|
}
|
|
|
|
verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
|
|
|
|
_check_test_img
|
|
|
|
# success, all done
|
|
echo "*** done"
|
|
rm -f $seq.full
|
|
status=0
|