Re: [PATCH 0/2] tests/migration: Fix migration-test slowdown

[Juan Quintela <quintela@redhat.com>]

Thomas Huth <thuth@redhat.com> wrote:
> On 12/04/2023 16.19, Juan Quintela wrote:
>> Since commit:
>> commit 1bfc8dde505f1e6a92697c52aa9b09e81b54c78f
>> Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
>> Date:   Mon Mar 6 15:26:12 2023 +0000
>>      tests/migration: Tweek auto converge limits check
>>      Thomas found an autoconverge test failure where the
>>      migration completed before the autoconverge had kicked in.
>>      [...]
>> migration-test has become very slow.
>> On my laptop, before that commit migration-test takes 2min10seconds
>> After that commit, it takes around 11minutes
>> We can't revert it because it fixes a real problem when the host
>> machine is overloaded.  See the comment on test_migrate_auto_converge().
>
> Thanks, your patches decrease the time to run the migration-test from
> 16 minutes down to 5 minutes on my system, that's a great improvement,
> indeed!
>
> Tested-by: Thomas Huth <thuth@redhat.com>

Thanks

> (though 5 minutes are still quite a lot for qtests ... maybe some
> other parts could be moved to only run with g_test_slow() ?)

Hi

Could you gime the output of:

time for i in $(./tests/qtest/migration-test -l | grep "^/"); do echo $i; time ./tests/qtest/migration-test -p $i; done

To see what tests are taking so long on your system?

On my system (i9900K processor, i.e. not the latest) and auto_converge
moved to slow the total of the tests take a bit more than 1 minute.

qemu-system-x86_64 on x86_64 host:
real	0m54.295s
user	0m47.283s
sys	0m16.969s

qemu-system-aarch64 on x86_64 host:

real	0m42.466s
user	0m42.247s
sys	0m13.747s

s390x and ppc64 refuse to run non-natively.

Later, Juan.