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https://github.com/xemu-project/xemu.git
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96054c76ff
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>
260 lines
13 KiB
Plaintext
260 lines
13 KiB
Plaintext
QA output created by 122
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
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wrote 67108864/67108864 bytes at offset 0
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64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Check allocation status regression with -B ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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wrote 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Offset Length File
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0 0x300000 TEST_DIR/t.IMGFMT.orig
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0x300000 0x3d00000 TEST_DIR/t.IMGFMT.base
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=== Check that zero clusters are kept in overlay ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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wrote 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Converting to an overlay larger than its backing file ===
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=268435456
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=805306368 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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Offset Length File
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wrote 1048576/1048576 bytes at offset 267386880
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1048576/1048576 bytes at offset 629145600
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Offset Length File
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0xff00000 0x100000 TEST_DIR/t.IMGFMT.base
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0x25800000 0x100000 TEST_DIR/t.IMGFMT.orig
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read 1048576/1048576 bytes at offset 267386880
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1048576/1048576 bytes at offset 629145600
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Concatenate multiple source images ===
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Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=4194304
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Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=4194304
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Formatting 'TEST_DIR/t.IMGFMT.3', fmt=IMGFMT size=4194304
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wrote 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Offset Length File
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0 0x10000 TEST_DIR/t.IMGFMT
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0x400000 0x10000 TEST_DIR/t.IMGFMT
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0x800000 0x10000 TEST_DIR/t.IMGFMT
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read 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 65536/65536 bytes at offset 4194304
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 65536/65536 bytes at offset 8388608
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false}]
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read 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 65536/65536 bytes at offset 4194304
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 65536/65536 bytes at offset 8388608
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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qemu-img: Having a backing file for the target makes no sense when concatenating multiple input images
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qemu-img: Having a backing file for the target makes no sense when concatenating multiple input images
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=== Compression with misaligned allocations and image sizes ===
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Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=1047552
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Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=1047552
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wrote 16384/16384 bytes at offset 16384
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16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 133120/133120 bytes at offset 133120
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130 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 1046528
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 0
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false}]
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read 16384/16384 bytes at offset 0
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16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 16384/16384 bytes at offset 16384
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16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 100352/100352 bytes at offset 32768
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98 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 133120/133120 bytes at offset 133120
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130 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 780288/780288 bytes at offset 266240
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762 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 1046528
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 1047552
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1046528/1046528 bytes at offset 1048576
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1022 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Full allocation with -S 0 ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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wrote 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 3145728/3145728 bytes at offset 3145728
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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convert -S 0:
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 63963136/63963136 bytes at offset 3145728
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61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
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convert -c -S 0:
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 63963136/63963136 bytes at offset 3145728
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61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
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wrote 33554432/33554432 bytes at offset 0
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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wrote 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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convert -S 0 with source backing file:
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 30408704/30408704 bytes at offset 3145728
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29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
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convert -c -S 0 with source backing file:
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 30408704/30408704 bytes at offset 3145728
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29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
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convert -S 0 -B ...
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 30408704/30408704 bytes at offset 3145728
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29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
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convert -c -S 0 -B ...
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read 3145728/3145728 bytes at offset 0
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3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 30408704/30408704 bytes at offset 3145728
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29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 33554432/33554432 bytes at offset 33554432
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32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
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=== Non-zero -S ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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wrote 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 0
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 8192
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 17408
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 1024/1024 bytes at offset 66560
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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convert -S 4k
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[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
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{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
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{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
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{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false}]
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convert -c -S 4k
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[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
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convert -S 8k
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[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
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{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false}]
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convert -c -S 8k
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[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
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{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
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{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
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=== -n to a non-zero image ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
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wrote 65536/65536 bytes at offset 0
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64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Images are identical.
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=== -n to an empty image ===
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Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false}]
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=== -n to an empty image with a backing file ===
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Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
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[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
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=== -n -B to an image without a backing file ===
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
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Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
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=== -n incompatible with -o ===
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qemu-img: -o has no effect when skipping image creation
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*** done
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