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qemu/tests/qemu-iotests/122.out
Vladimir Sementsov-Ogievskiy 96054c76ff qemu-img: make is_allocated_sectors() more efficient 
Consider the case when the whole buffer is zero and end is unaligned.

If i <= tail, we return 1 and do one unaligned WRITE, RMW happens.

If i > tail, we do on aligned WRITE_ZERO (or skip if target is zeroed)
and again one unaligned WRITE, RMW happens.

Let's do better: don't fragment the whole-zero buffer and report it as
ZERO: in case of zeroed target we just do nothing and avoid RMW. If
target is not zeroes, one unaligned WRITE_ZERO should not be much worse
than one unaligned WRITE.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211217164654.1184218-3-vsementsov@virtuozzo.com>
Tested-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2022-01-14 12:03:16 +01:00

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QA output created by 122
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
wrote 67108864/67108864 bytes at offset 0
64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Check allocation status regression with -B ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
wrote 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Offset Length File
0 0x300000 TEST_DIR/t.IMGFMT.orig
0x300000 0x3d00000 TEST_DIR/t.IMGFMT.base
=== Check that zero clusters are kept in overlay ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
wrote 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Converting to an overlay larger than its backing file ===
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=268435456
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=805306368 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
Offset Length File
wrote 1048576/1048576 bytes at offset 267386880
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1048576/1048576 bytes at offset 629145600
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Offset Length File
0xff00000 0x100000 TEST_DIR/t.IMGFMT.base
0x25800000 0x100000 TEST_DIR/t.IMGFMT.orig
read 1048576/1048576 bytes at offset 267386880
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 1048576/1048576 bytes at offset 629145600
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Concatenate multiple source images ===
Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=4194304
Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=4194304
Formatting 'TEST_DIR/t.IMGFMT.3', fmt=IMGFMT size=4194304
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Offset Length File
0 0x10000 TEST_DIR/t.IMGFMT
0x400000 0x10000 TEST_DIR/t.IMGFMT
0x800000 0x10000 TEST_DIR/t.IMGFMT
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 4194304
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 8388608
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false}]
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 4194304
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 8388608
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-img: Having a backing file for the target makes no sense when concatenating multiple input images
qemu-img: Having a backing file for the target makes no sense when concatenating multiple input images
=== Compression with misaligned allocations and image sizes ===
Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=1047552
Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=1047552
wrote 16384/16384 bytes at offset 16384
16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 133120/133120 bytes at offset 133120
130 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 1046528
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 0
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false}]
read 16384/16384 bytes at offset 0
16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 16384/16384 bytes at offset 16384
16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 100352/100352 bytes at offset 32768
98 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 133120/133120 bytes at offset 133120
130 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 780288/780288 bytes at offset 266240
762 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 1024/1024 bytes at offset 1046528
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 1024/1024 bytes at offset 1047552
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 1046528/1046528 bytes at offset 1048576
1022 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
=== Full allocation with -S 0 ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
wrote 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 3145728/3145728 bytes at offset 3145728
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
convert -S 0:
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 63963136/63963136 bytes at offset 3145728
61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
convert -c -S 0:
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 63963136/63963136 bytes at offset 3145728
61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
wrote 33554432/33554432 bytes at offset 0
32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
wrote 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
convert -S 0 with source backing file:
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 30408704/30408704 bytes at offset 3145728
29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 33554432/33554432 bytes at offset 33554432
32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
convert -c -S 0 with source backing file:
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 30408704/30408704 bytes at offset 3145728
29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 33554432/33554432 bytes at offset 33554432
32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
convert -S 0 -B ...
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 30408704/30408704 bytes at offset 3145728
29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 33554432/33554432 bytes at offset 33554432
32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
convert -c -S 0 -B ...
read 3145728/3145728 bytes at offset 0
3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 30408704/30408704 bytes at offset 3145728
29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 33554432/33554432 bytes at offset 33554432
32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
=== Non-zero -S ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 0
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 8192
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 17408
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 1024/1024 bytes at offset 66560
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
convert -S 4k
[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false}]
convert -c -S 4k
[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
convert -S 8k
[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false}]
convert -c -S 8k
[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
=== -n to a non-zero image ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Images are identical.
=== -n to an empty image ===
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false}]
=== -n to an empty image with a backing file ===
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
=== -n -B to an image without a backing file ===
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
=== -n incompatible with -o ===
qemu-img: -o has no effect when skipping image creation
*** done
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