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Re: Slow down with: 'Make "info qom-tree" show children sorted'
From: |
Markus Armbruster |
Subject: |
Re: Slow down with: 'Make "info qom-tree" show children sorted' |
Date: |
Tue, 07 Jul 2020 07:33:49 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Philippe Mathieu-Daudé <philmd@redhat.com> writes:
> On 7/7/20 6:45 AM, Thomas Huth wrote:
>> On 27/05/2020 10.47, Markus Armbruster wrote:
>>> "info qom-tree" prints children in unstable order. This is a pain
>>> when diffing output for different versions to find change. Print it
>>> sorted.
>>>
>>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>>> ---
>>> qom/qom-hmp-cmds.c | 24 ++++++++++++++++--------
>>> 1 file changed, 16 insertions(+), 8 deletions(-)
>>
>> Hi Markus,
>>
>> this patch causes a slow down of the qtests which becomes quite massive
>> when e.g. using the ppc64 and thourough testing. When I'm running
>>
>> QTEST_QEMU_BINARY="ppc64-softmmu/qemu-system-ppc64" time \
>> ./tests/qtest/device-introspect-test -m slow | tail -n 10
>>
>> the test runs for ca. 6m40s here before the patch got applied, and for
>> mor than 20 minutes after the patch got applied!
That's surprising.
> Argh, yesterday I reviewed again all the range except this patch... not
> sure why as looking at it now it is obvious.
>
>> This causes our gitlab CI to constantly fail since the patch got merged,
>> since the testing time now exceeds the 1h time limit:
>>
>> https://gitlab.com/qemu-project/qemu/-/pipelines/156767175
>>
>> Sure, we can work around that problem in the CI (Alex has already a
>> patch queued), but still, is there something you could do about this
>> massive slowdown?
>
> Suggestion: add a '-u' option for unsorted mode, to use in qtests.
>
> Humans want the new behavior (default: sorted).
Last resort.
I'll look into speeding up the sort first.
Work-around: drop -m slow until we get this sorted (pardon the pun).
- Slow down with: 'Make "info qom-tree" show children sorted', Thomas Huth, 2020/07/07
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Philippe Mathieu-Daudé, 2020/07/07
- Re: Slow down with: 'Make "info qom-tree" show children sorted',
Markus Armbruster <=
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Paolo Bonzini, 2020/07/07
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Markus Armbruster, 2020/07/07
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Daniel P . Berrangé, 2020/07/07
- Re: Slow down with: 'Make "info qom-tree" show children sorted', David Gibson, 2020/07/12
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Markus Armbruster, 2020/07/13
- Re: Slow down with: 'Make "info qom-tree" show children sorted', David Gibson, 2020/07/15
- Re: Slow down with: 'Make "info qom-tree" show children sorted', Markus Armbruster, 2020/07/16
- Re: Slow down with: 'Make "info qom-tree" show children sorted', David Gibson, 2020/07/17
Re: Slow down with: 'Make "info qom-tree" show children sorted', Daniel P . Berrangé, 2020/07/07