[Qemu-devel] [PATCH v2 0/5] qemu-iotests: Test case for IO throttling

[Fam Zheng <famz@redhat.com>]

This series adds iotest case for IO throttling.

There is a change in qemu-io sub-commands "aio_read" and "aio_write", which
makes the aio requests accounted and the statistics reflected in blockstats.

Note that IO throttling implementation allows overcommiting of requests, so the
actual IO happened in a time unit may be a bit larger than given limits. In the
test case, the stats numbers are compared against 110%, to make room for such
flexibility in order to improve determinism.

v2:

    [01/05] qemu-io: Account IO by aio_read and aio_write
            Account unconditionally. (Paolo)

    [02/05] qtest: Add scripts/qtest/qtest.py
            New.

    [03/05] qemu-iotests: Add VM method qtest() to iotests.py
            Utilize qtests.py

    [04/05] qemu-iotests: Allow caller to disable underscore convertion for qmp
            Fix commit spelling. (Eric)

    [05/05] qemu-iotests: Add 080 for IO throttling
            Add assertion on ending blockstats.
            Spell fix. (Stefan)
            Change bps limits to 1024. (Stefan)
            Remove commented line. (Stefan)
            Add comment on overriding "bps_max" and "iops_max". (Stefan)
            Reduce amount of requests issued with qemu-io cmd. (Stefan)
            Change "<" to "<=" in check_limits, it's safer for burst.



Fam Zheng (5):
  qemu-io: Account IO by aio_read and aio_write
  qtest: Add scripts/qtest/qtest.py
  qemu-iotests: Add VM method qtest() to iotests.py
  qemu-iotests: Allow caller to disable underscore convertion for qmp
  qemu-iotests: Add 080 for IO throttling

 qemu-io-cmds.c                |  10 +++
 scripts/qtest                 |   5 --
 scripts/qtest/qtest.py        |  78 +++++++++++++++++++
 tests/qemu-iotests/080        | 172 ++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/080.out    |   5 ++
 tests/qemu-iotests/group      |   1 +
 tests/qemu-iotests/iotests.py |  27 ++++++-
 7 files changed, 289 insertions(+), 9 deletions(-)
 delete mode 100755 scripts/qtest
 create mode 100644 scripts/qtest/qtest.py
 create mode 100755 tests/qemu-iotests/080
 create mode 100644 tests/qemu-iotests/080.out

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1.8.5.4