Re: [PATCH 3/4] tests/migration: Disable autoconverge test on Travis-CI s390x

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Philippe Mathieu-Daudé (philmd@redhat.com) wrote:
> This test fails on Travis-CI s390x when configured with --disable-tcg:
> 
>   $ make check-qtest
>     TEST    check-qtest-s390x: tests/qtest/boot-serial-test
>   qemu-system-s390x: -accel tcg: invalid accelerator tcg
>   qemu-system-s390x: falling back to KVM
>     TEST    check-qtest-s390x: tests/qtest/pxe-test
>     TEST    check-qtest-s390x: tests/qtest/test-netfilter
>     TEST    check-qtest-s390x: tests/qtest/test-filter-mirror
>     TEST    check-qtest-s390x: tests/qtest/test-filter-redirector
>     TEST    check-qtest-s390x: tests/qtest/drive_del-test
>     TEST    check-qtest-s390x: tests/qtest/device-plug-test
>     TEST    check-qtest-s390x: tests/qtest/virtio-ccw-test
>     TEST    check-qtest-s390x: tests/qtest/cpu-plug-test
>     TEST    check-qtest-s390x: tests/qtest/migration-test
>   **
>   ERROR:tests/qtest/migration-test.c:1229:test_migrate_auto_converge: 'got_stop' should be FALSE
>   ERROR - Bail out! ERROR:tests/qtest/migration-test.c:1229:test_migrate_auto_converge: 'got_stop' should be FALSE
>   make: *** [tests/Makefile.include:633: check-qtest-s390x] Error 1

Before we take the hammer to it, could you try reducing it's initial
bandwidth, the code that says:

    /*
     * Set the initial parameters so that the migration could not converge
     * without throttling.
     */
    migrate_set_parameter_int(from, "downtime-limit", 1);
    migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb/s */

knock a couple of 0's off that and see if it's happy.

Dave

> Per David Gilbert, it might be a threshold requiring tuning:
> "it could just be the writing is slow on s390 and the migration
> thread fast; in which case the autocomplete wouldn't be needed.
> Perhaps we just need to reduce the bandwidth limit."
> 
> Disable the autoconverge test for now.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  tests/qtest/migration-test.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
> index 3d6cc83b88..878399666e 100644
> --- a/tests/qtest/migration-test.c
> +++ b/tests/qtest/migration-test.c
> @@ -1181,6 +1181,16 @@ static void test_migrate_auto_converge(void)
>      MigrateStart *args = migrate_start_new();
>      QTestState *from, *to;
>      int64_t remaining, percentage;
> +    char *travis_arch;
> +
> +    /*
> +     * This test does not work reliably on Travis s390x.
> +     */
> +    travis_arch = getenv("TRAVIS_CPU_ARCH");
> +    if (travis_arch && g_str_equal(travis_arch, "s390x")) {
> +        g_test_skip("Test does not work reliably on s390x Travis containers.");
> +        return;
> +    }
>  
>      /*
>       * We want the test to be stable and as fast as possible.
> -- 
> 2.21.1
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK