Re: [Qemu-devel] [PATCH v3 3/8] tests: Add migration multifd test

[Wei Yang <richardw.yang@linux.intel.com>]

On Wed, May 15, 2019 at 02:15:39PM +0200, Juan Quintela wrote:
>We set multifd-channels.
>
>Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
>Reviewed-by: Thomas Huth <thuth@redhat.com>
>Signed-off-by: Juan Quintela <quintela@redhat.com>
>---
> tests/migration-test.c | 48 ++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
>
>diff --git a/tests/migration-test.c b/tests/migration-test.c
>index 0b25aa3d6c..ff480e0682 100644
>--- a/tests/migration-test.c
>+++ b/tests/migration-test.c
>@@ -1028,6 +1028,53 @@ static void test_precopy_tcp(void)
>     g_free(uri);
> }
> 
>+static void test_multifd_tcp(void)
>+{
>+    char *uri;
>+    QTestState *from, *to;
>+
>+    if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
>+        return;
>+    }
>+
>+    /*
>+     * We want to pick a speed slow enough that the test completes
>+     * quickly, but that it doesn't complete precopy even on a slow
>+     * machine, so also set the downtime.
>+     */
>+    /* 1 ms should make it not converge*/
>+    migrate_set_parameter_int(from, "downtime-limit", 1);
>+    /* 1GB/s */
>+    migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
>+
>+    migrate_set_parameter_int(from, "multifd-channels", 2);
>+    migrate_set_parameter_int(to, "multifd-channels", 2);
>+
>+    migrate_set_capability(from, "multifd", "true");
>+    migrate_set_capability(to, "multifd", "true");

Hi, Juan

In case to test multifd, what's the minimum configuration? Set multifd
capability at both side is fine?

>+    /* Wait for the first serial output from the source */
>+    wait_for_serial("src_serial");
>+
>+    uri = migrate_get_socket_address(to, "socket-address");
>+
>+    migrate(from, uri, "{}");
>+
>+    wait_for_migration_pass(from);
>+
>+    /* 300ms it should converge */
>+    migrate_set_parameter_int(from, "downtime-limit", 600);
>+
>+    if (!got_stop) {
>+        qtest_qmp_eventwait(from, "STOP");
>+    }
>+    qtest_qmp_eventwait(to, "RESUME");
>+
>+    wait_for_serial("dest_serial");
>+    wait_for_migration_complete(from);
>+
>+    test_migrate_end(from, to, true);
>+}
>+
> int main(int argc, char **argv)
> {
>     char template[] = "/tmp/migration-test-XXXXXX";
>@@ -1082,6 +1129,7 @@ int main(int argc, char **argv)
>     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
>     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
>     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
>+    qtest_add_func("/migration/multifd/tcp", test_multifd_tcp);
> 
>     ret = g_test_run();
> 
>-- 
>2.21.0
>

-- 
Wei Yang
Help you, Help me