[PATCH 3/5] tests: increase migration test converge downtime to 30 seconds

Daniel P. Berrangé posted 5 patches 3 years, 7 months ago
Maintainers: Thomas Huth <thuth@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Juan Quintela <quintela@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>
[PATCH 3/5] tests: increase migration test converge downtime to 30 seconds
Posted by Daniel P. Berrangé 3 years, 7 months ago
While 1 second might be enough to converge migration on a fast host,
this is not guaranteed, especially if using TLS in the tests without
hardware accelerated crypto available.

Increasing the downtime to 30 seconds should guarantee it can converge
in any sane scenario.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/qtest/migration-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index ac9e303b1f..a54eff6d56 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -47,7 +47,7 @@ unsigned end_address;
 static bool uffd_feature_thread_id;
 
 /* A downtime where the test really should converge */
-#define CONVERGE_DOWNTIME 1000
+#define CONVERGE_DOWNTIME (1000 * 30)
 
 #if defined(__linux__)
 #include <sys/syscall.h>
-- 
2.36.1


Re: [PATCH 3/5] tests: increase migration test converge downtime to 30 seconds
Posted by Laurent Vivier 3 years, 7 months ago
On 28/06/2022 12:54, Daniel P. Berrangé wrote:
> While 1 second might be enough to converge migration on a fast host,
> this is not guaranteed, especially if using TLS in the tests without
> hardware accelerated crypto available.
> 
> Increasing the downtime to 30 seconds should guarantee it can converge
> in any sane scenario.
> 
> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
>   tests/qtest/migration-test.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
> index ac9e303b1f..a54eff6d56 100644
> --- a/tests/qtest/migration-test.c
> +++ b/tests/qtest/migration-test.c
> @@ -47,7 +47,7 @@ unsigned end_address;
>   static bool uffd_feature_thread_id;
>   
>   /* A downtime where the test really should converge */
> -#define CONVERGE_DOWNTIME 1000
> +#define CONVERGE_DOWNTIME (1000 * 30)
>   
>   #if defined(__linux__)
>   #include <sys/syscall.h>

Reviewed-by: Laurent Vivier <laurent@vivier.eu>