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qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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 ===
opts: produce valid command line in qemu_opts_print This will let us print options in a format that the user would actually write it on the command line (foo=bar,baz=asd,etc=def), without prepending a spurious comma at the beginning of the list, or quoting values unnecessarily. This patch provides the following changes: * write and id=, if the option has an id * do not print separator before the first element * do not quote string arguments * properly escape commas (,) for QEMU Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-07-07 17:42:10 +03:00
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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 ===
opts: produce valid command line in qemu_opts_print This will let us print options in a format that the user would actually write it on the command line (foo=bar,baz=asd,etc=def), without prepending a spurious comma at the beginning of the list, or quoting values unnecessarily. This patch provides the following changes: * write and id=, if the option has an id * do not print separator before the first element * do not quote string arguments * properly escape commas (,) for QEMU Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-07-07 17:42:10 +03:00
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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)
iotests: Test post-backing convert target behavior This adds a test case to 122 for what happens when you convert to a target with a backing file that is shorter than the target, and the image format does not support efficient zero writes (as is the case with qcow2 v2). Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20180501165750.19242-3-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2018-05-01 19:57:50 +03:00
=== 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
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)
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
=== 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, "zero": false, "data": true},
{ "start": 65536, "length": 4128768, "depth": 0, "zero": true, "data": false},
{ "start": 4194304, "length": 65536, "depth": 0, "zero": false, "data": true},
{ "start": 4259840, "length": 4128768, "depth": 0, "zero": true, "data": false},
{ "start": 8388608, "length": 65536, "depth": 0, "zero": false, "data": true},
{ "start": 8454144, "length": 4128768, "depth": 0, "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/convert: Move bs_n > 1 && -B check down It does not make much sense to use a backing image for the target when you concatenate multiple images (because then there is no correspondence between the source images' backing files and the target's); but it was still possible to give one by using -o backing_file=X instead of -B X. Fix this by moving the check. (Also, change the error message because -B is not the only way to specify the backing file, evidently.) Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-04-26 16:46:48 +03:00
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
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
=== 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, "zero": false, "data": true},
{ "start": 65536, "length": 65536, "depth": 0, "zero": true, "data": false},
{ "start": 131072, "length": 196608, "depth": 0, "zero": false, "data": true},
{ "start": 327680, "length": 655360, "depth": 0, "zero": true, "data": false},
{ "start": 983040, "length": 65536, "depth": 0, "zero": false, "data": true},
{ "start": 1048576, "length": 1046528, "depth": 0, "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)
iotests: Improve _filter_qemu_img_map Although _filter_qemu_img_map documents that it scrubs offsets, it was only doing so for human mode. Of the existing tests using the filter (97, 122, 150, 154, 176), two of them are affected, but it does not hurt the validity of the tests to not require particular mappings (another test, 66, uses offsets but intentionally does not pass through _filter_qemu_img_map, because it checks that offsets are unchanged before and after an operation). Another justification for this patch is that it will allow a future patch to utilize 'qemu-img map --output=json' to check the status of preallocated zero clusters without regards to the mapping (since the qcow2 mapping can be very sensitive to the chosen cluster size, when preallocation is not in use). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-9-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-05-07 03:05:48 +03:00
[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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)
qemu-img: Fix preallocation with -S 0 for convert When passing -S 0 to qemu-img convert, the target image is supposed to be fully allocated. Right now, this is not the case if the source image contains areas which bdrv_get_block_status() reports as being zero. This patch changes a zeroed area's status from BLK_ZERO to BLK_DATA before invoking convert_write() if -S 0 has been specified. In addition, the check whether convert_read() actually needs to do anything (basically only if the current area is a BLK_DATA area) is pulled out of that function to the caller. If -S 0 has been specified, zeroed areas need to be written as data to the output, thus they then have to be accounted when calculating the progress made. This patch changes the reference output for iotest 122; contrary to what it assumed, -S 0 really should allocate everything in the output, not just areas that are filled with zeros (as opposed to being zeroed). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-03-25 01:33:57 +03:00
[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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)
opts: produce valid command line in qemu_opts_print This will let us print options in a format that the user would actually write it on the command line (foo=bar,baz=asd,etc=def), without prepending a spurious comma at the beginning of the list, or quoting values unnecessarily. This patch provides the following changes: * write and id=, if the option has an id * do not print separator before the first element * do not quote string arguments * properly escape commas (,) for QEMU Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-07-07 17:42:10 +03:00
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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)
iotests: Improve _filter_qemu_img_map Although _filter_qemu_img_map documents that it scrubs offsets, it was only doing so for human mode. Of the existing tests using the filter (97, 122, 150, 154, 176), two of them are affected, but it does not hurt the validity of the tests to not require particular mappings (another test, 66, uses offsets but intentionally does not pass through _filter_qemu_img_map, because it checks that offsets are unchanged before and after an operation). Another justification for this patch is that it will allow a future patch to utilize 'qemu-img map --output=json' to check the status of preallocated zero clusters without regards to the mapping (since the qcow2 mapping can be very sensitive to the chosen cluster size, when preallocation is not in use). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-9-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-05-07 03:05:48 +03:00
[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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, "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)
iotests: Improve _filter_qemu_img_map Although _filter_qemu_img_map documents that it scrubs offsets, it was only doing so for human mode. Of the existing tests using the filter (97, 122, 150, 154, 176), two of them are affected, but it does not hurt the validity of the tests to not require particular mappings (another test, 66, uses offsets but intentionally does not pass through _filter_qemu_img_map, because it checks that offsets are unchanged before and after an operation). Another justification for this patch is that it will allow a future patch to utilize 'qemu-img map --output=json' to check the status of preallocated zero clusters without regards to the mapping (since the qcow2 mapping can be very sensitive to the chosen cluster size, when preallocation is not in use). Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20170507000552.20847-9-eblake@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-05-07 03:05:48 +03:00
[{ "start": 0, "length": 67108864, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
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, "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)
convert -S 4k
qemu-img: align result of is_allocated_sectors We currently don't enforce that the sparse segments we detect during convert are aligned. This leads to unnecessary and costly read-modify-write cycles either internally in Qemu or in the background on the storage device as nearly all modern filesystems or hardware have a 4k alignment internally. This patch modifies is_allocated_sectors so that its *pnum result will always end at an alignment boundary. This way all requests will end at an alignment boundary. The start of all requests will also be aligned as long as the results of get_block_status do not lead to an unaligned offset. The number of RMW cycles when converting an example image [1] to a raw device that has 4k sector size is about 4600 4k read requests to perform a total of about 15000 write requests. With this path the additional 4600 read requests are eliminated while the number of total write requests stays constant. [1] https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.vmdk Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-07-12 16:00:10 +03:00
[{ "start": 0, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 4096, "length": 4096, "depth": 0, "zero": true, "data": false},
{ "start": 8192, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 12288, "length": 4096, "depth": 0, "zero": true, "data": false},
{ "start": 16384, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 20480, "length": 67088384, "depth": 0, "zero": true, "data": false}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
convert -c -S 4k
[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 1024, "length": 7168, "depth": 0, "zero": true, "data": false},
{ "start": 8192, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 9216, "length": 8192, "depth": 0, "zero": true, "data": false},
{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 18432, "length": 67090432, "depth": 0, "zero": true, "data": false}]
convert -S 8k
qemu-img: align result of is_allocated_sectors We currently don't enforce that the sparse segments we detect during convert are aligned. This leads to unnecessary and costly read-modify-write cycles either internally in Qemu or in the background on the storage device as nearly all modern filesystems or hardware have a 4k alignment internally. This patch modifies is_allocated_sectors so that its *pnum result will always end at an alignment boundary. This way all requests will end at an alignment boundary. The start of all requests will also be aligned as long as the results of get_block_status do not lead to an unaligned offset. The number of RMW cycles when converting an example image [1] to a raw device that has 4k sector size is about 4600 4k read requests to perform a total of about 15000 write requests. With this path the additional 4600 read requests are eliminated while the number of total write requests stays constant. [1] https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.vmdk Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-07-12 16:00:10 +03:00
[{ "start": 0, "length": 24576, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 24576, "length": 67084288, "depth": 0, "zero": true, "data": false}]
qemu-iotests: Some qemu-img convert tests This adds a regression test for some problems that the qemu-img convert rewrite just fixed. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-03-19 15:33:33 +03:00
convert -c -S 8k
[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 1024, "length": 7168, "depth": 0, "zero": true, "data": false},
{ "start": 8192, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 9216, "length": 8192, "depth": 0, "zero": true, "data": false},
{ "start": 17408, "length": 1024, "depth": 0, "zero": false, "data": true},
{ "start": 18432, "length": 67090432, "depth": 0, "zero": true, "data": false}]
*** done
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