Re: [Qemu-devel] qemu-system-s390x tests/boot-serial-test intermittent failure

[Thomas Huth]

On 24.03.2017 12:11, Christian Borntraeger wrote:
> On 03/24/2017 11:57 AM, Peter Maydell wrote:
>> Hi; qemu-system-s390x seems to have an intermittent failure at
>> the moment -- it's been causing our Travis builds to flap. I actually
>> caught it doing this on one of my local test builds (which happens
>> to be aarch64 but I don't think that matters, since Travis is doing
>> x86 builds):
>>
>> while  QTEST_QEMU_BINARY=s390x-softmmu/qemu-system-s390x
>> QTEST_QEMU_IMG=qemu-img MALLOC_PERTURB_=${MALLOC_PERTURB_:-$((RANDOM %
>> 255 + 1))} gtester -k --verbose -m=quick tests/boot-serial-test ; do
>> true; done
>>  TEST: tests/boot-serial-test... (pid=1122)
>>   /s390x/boot-serial/s390-ccw-virtio:                                  OK
>> PASS: tests/boot-serial-test
>> TEST: tests/boot-serial-test... (pid=1135)
>>   /s390x/boot-serial/s390-ccw-virtio:                                  OK
>> [skip lots more successes]
>> TEST: tests/boot-serial-test... (pid=1582)
>>   /s390x/boot-serial/s390-ccw-virtio:
>> Broken pipe
>> FAIL
>> GTester: last random seed: R02Se94f36f305f2edd8391a22749ec91143
>> (pid=1635)
>> FAIL: tests/boot-serial-test
>>
>> Any ideas?

I was not able to reproduce this issue so far (on my x86 laptop since I
don't have an aarch64 host) ... can you reproduce it by running the test
directly, too, e.g. something like:

QTEST_QEMU_BINARY=s390x-softmmu/qemu-system-s390x tests/boot-serial-test

?

> Adding Thomas who did the s390 version.
> 
> One idea. Maybe qemu exits before the other side is ready.

Or could this be a timeout issue again? Is the host very loaded?
(however, I don't really believe that this could be the issue here,
since the test is rather fast)

 Thomas