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iotests/iov-padding: New test
Test that even vectored IO requests with 1024 vector elements that are not aligned to the device's request alignment will succeed. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: Hanna Czenczek <hreitz@redhat.com> Message-Id: <20230411173418.19549-5-hreitz@redhat.com>
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| #!/usr/bin/env bash | ||
| # group: rw quick | ||
| # | ||
| # Check the interaction of request padding (to fit alignment restrictions) with | ||
| # vectored I/O from the guest | ||
| # | ||
| # Copyright Red Hat | ||
| # | ||
| # 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/>. | ||
| # | ||
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| seq=$(basename $0) | ||
| echo "QA output created by $seq" | ||
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| status=1 # failure is the default! | ||
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| _cleanup() | ||
| { | ||
| _cleanup_test_img | ||
| } | ||
| trap "_cleanup; exit \$status" 0 1 2 3 15 | ||
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| # get standard environment, filters and checks | ||
| cd .. | ||
| . ./common.rc | ||
| . ./common.filter | ||
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| _supported_fmt raw | ||
| _supported_proto file | ||
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| _make_test_img 1M | ||
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| IMGSPEC="driver=blkdebug,align=4096,image.driver=file,image.filename=$TEST_IMG" | ||
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| # Four combinations: | ||
| # - Offset 4096, length 1023 * 512 + 512: Fully aligned to 4k | ||
| # - Offset 4096, length 1023 * 512 + 4096: Head is aligned, tail is not | ||
| # - Offset 512, length 1023 * 512 + 512: Neither head nor tail are aligned | ||
| # - Offset 512, length 1023 * 512 + 4096: Tail is aligned, head is not | ||
| for start_offset in 4096 512; do | ||
| for last_element_length in 512 4096; do | ||
| length=$((1023 * 512 + $last_element_length)) | ||
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| echo | ||
| echo "== performing 1024-element vectored requests to image (offset: $start_offset; length: $length) ==" | ||
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| # Fill with data for testing | ||
| $QEMU_IO -c 'write -P 1 0 1M' "$TEST_IMG" | _filter_qemu_io | ||
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| # 1023 512-byte buffers, and then one with length $last_element_length | ||
| cmd_params="-P 2 $start_offset $(yes 512 | head -n 1023 | tr '\n' ' ') $last_element_length" | ||
| QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \ | ||
| -c "writev $cmd_params" \ | ||
| --image-opts \ | ||
| "$IMGSPEC" \ | ||
| | _filter_qemu_io | ||
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| # Read all patterns -- read the part we just wrote with writev twice, | ||
| # once "normally", and once with a readv, so we see that that works, too | ||
| QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \ | ||
| -c "read -P 1 0 $start_offset" \ | ||
| -c "read -P 2 $start_offset $length" \ | ||
| -c "readv $cmd_params" \ | ||
| -c "read -P 1 $((start_offset + length)) $((1024 * 1024 - length - start_offset))" \ | ||
| --image-opts \ | ||
| "$IMGSPEC" \ | ||
| | _filter_qemu_io | ||
| done | ||
| done | ||
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| # success, all done | ||
| echo "*** done" | ||
| rm -f $seq.full | ||
| status=0 |
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| QA output created by iov-padding | ||
| Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 | ||
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| == performing 1024-element vectored requests to image (offset: 4096; length: 524288) == | ||
| wrote 1048576/1048576 bytes at offset 0 | ||
| 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 524288/524288 bytes at offset 4096 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 4096/4096 bytes at offset 0 | ||
| 4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 524288/524288 bytes at offset 4096 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 524288/524288 bytes at offset 4096 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 520192/520192 bytes at offset 528384 | ||
| 508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
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| == performing 1024-element vectored requests to image (offset: 4096; length: 527872) == | ||
| wrote 1048576/1048576 bytes at offset 0 | ||
| 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 527872/527872 bytes at offset 4096 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 4096/4096 bytes at offset 0 | ||
| 4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 527872/527872 bytes at offset 4096 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 527872/527872 bytes at offset 4096 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 516608/516608 bytes at offset 531968 | ||
| 504.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
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| == performing 1024-element vectored requests to image (offset: 512; length: 524288) == | ||
| wrote 1048576/1048576 bytes at offset 0 | ||
| 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 524288/524288 bytes at offset 512 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 524288/524288 bytes at offset 512 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 524288/524288 bytes at offset 512 | ||
| 512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 523776/523776 bytes at offset 524800 | ||
| 511.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
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| == performing 1024-element vectored requests to image (offset: 512; length: 527872) == | ||
| wrote 1048576/1048576 bytes at offset 0 | ||
| 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| wrote 527872/527872 bytes at offset 512 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 512/512 bytes at offset 0 | ||
| 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 527872/527872 bytes at offset 512 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 527872/527872 bytes at offset 512 | ||
| 515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| read 520192/520192 bytes at offset 528384 | ||
| 508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) | ||
| *** done |