qemu-iotests: Use zero-based offsets for IO patterns

The io_pattern style functions have the following loop:

  for i in `seq 1 $count`; do
      echo ... $(( start + i * step )) ...
  done

Offsets are 1-based so start=1024, step=512, count=4 yields:
1536, 2048, 2560, 3072

Normally we expect:
1024, 1536, 2048, 2560

Most tests ignore this detail, which means that they perform I/O to a
slightly different range than expected by the test author.

Later on things got less innocent and tests started trying to compensate
for the 1-based indexing.  This included negative start values in test
024 and my own attempt with count-1 in test 028!

The end result is that tests that use io_pattern are hard to reason
about and don't work the way you'd expect.  It's time to clean this mess
up.

This patch switches io_pattern to 0-based offsets.  This requires
adjusting the golden outputs since I/O ranges are now shifted and output
differs.

Verifying these output diffs is easy, however.  Each diff hunk moves one
I/O from beyond the end of the pattern range to the beginning.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Stefan Hajnoczi 2011-02-04 12:55:02 +00:00 committed by Kevin Wolf
parent 9cdfa1b34e
commit dd0c35d69b
12 changed files with 1879 additions and 1869 deletions

View file

@ -3,6 +3,8 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=6442450944
Filling base image
=== IO: pattern 0
qemu-io> wrote 512/512 bytes at offset 0
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 1024
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 2048
@ -129,12 +131,12 @@ qemu-io> wrote 512/512 bytes at offset 63488
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 64512
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 65536
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 128
qemu-io> wrote 65536/65536 bytes at offset 131072
qemu-io> wrote 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> wrote 512/512 bytes at offset 4294967296
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4294968320
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4294969344
@ -261,10 +263,8 @@ qemu-io> wrote 512/512 bytes at offset 4295030784
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4295031808
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4295032832
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 128
qemu-io> wrote 65536/65536 bytes at offset 4295098368
qemu-io> wrote 65536/65536 bytes at offset 4295032832
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> No errors were found on the image.
Creating test image with backing file
@ -273,6 +273,8 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=6442450944 backing_file='TEST_DI
Filling test image
=== IO: pattern 1
qemu-io> wrote 512/512 bytes at offset 512
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 1536
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 2560
@ -399,12 +401,12 @@ qemu-io> wrote 512/512 bytes at offset 64000
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 65024
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 66048
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> wrote 65536/65536 bytes at offset 196608
qemu-io> wrote 65536/65536 bytes at offset 131072
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 1
qemu-io> wrote 512/512 bytes at offset 4294967808
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4294968832
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4294969856
@ -531,15 +533,15 @@ qemu-io> wrote 512/512 bytes at offset 4295031296
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4295032320
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> wrote 512/512 bytes at offset 4295033344
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> wrote 65536/65536 bytes at offset 4295163904
qemu-io> wrote 65536/65536 bytes at offset 4295098368
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> No errors were found on the image.
Reading
=== IO: pattern 0
qemu-io> read 512/512 bytes at offset 0
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 1024
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 2048
@ -666,9 +668,9 @@ qemu-io> read 512/512 bytes at offset 63488
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 64512
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 65536
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 1
qemu-io> read 512/512 bytes at offset 512
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 1536
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 2560
@ -795,18 +797,18 @@ qemu-io> read 512/512 bytes at offset 64000
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 65024
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 66048
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 128
qemu-io> read 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 131072
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 196608
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 393216
qemu-io> read 65536/65536 bytes at offset 327680
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 512/512 bytes at offset 4294967296
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4294968320
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4294969344
@ -933,9 +935,9 @@ qemu-io> read 512/512 bytes at offset 4295030784
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4295031808
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4295032832
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 1
qemu-io> read 512/512 bytes at offset 4294967808
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4294968832
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4294969856
@ -1062,16 +1064,14 @@ qemu-io> read 512/512 bytes at offset 4295031296
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4295032320
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> read 512/512 bytes at offset 4295033344
512.000000 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 128
qemu-io> read 65536/65536 bytes at offset 4295032832
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 4295098368
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 4295163904
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> === IO: pattern 0
qemu-io> read 65536/65536 bytes at offset 4295360512
qemu-io> read 65536/65536 bytes at offset 4295294976
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qemu-io> No errors were found on the image.
*** done