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[PATCH v2 4/6] tests/qtest: make more migration pre-copy scenarios run n
From: |
Daniel P . Berrangé |
Subject: |
[PATCH v2 4/6] tests/qtest: make more migration pre-copy scenarios run non-live |
Date: |
Fri, 21 Apr 2023 18:14:09 +0100 |
There are 27 pre-copy live migration scenarios being tested. In all of
these we force non-convergance and run for one iteration, then let it
converge and wait for completion during the second (or following)
iterations. At 3 mbps bandwidth limit the first iteration takes a very
long time (~30 seconds).
While it is important to test the migration passes and convergance
logic, it is overkill to do this for all 27 pre-copy scenarios. The
TLS migration scenarios in particular are merely exercising different
code paths during connection establishment.
To optimize time taken, switch most of the test scenarios to run
non-live (ie guest CPUs paused) with no bandwidth limits. This gives
a massive speed up for most of the test scenarios.
For test coverage the following scenarios are unchanged
* Precopy with UNIX sockets
* Precopy with UNIX sockets and dirty ring tracking
* Precopy with XBZRLE
* Precopy with multifd
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
tests/qtest/migration-test.c | 60 ++++++++++++++++++++++++++++++------
1 file changed, 50 insertions(+), 10 deletions(-)
diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 6492ffa7fe..40d0f75480 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -568,6 +568,9 @@ typedef struct {
MIG_TEST_FAIL_DEST_QUIT_ERR,
} result;
+ /* Whether the guest CPUs should be running during migration */
+ bool live;
+
/* Postcopy specific fields */
void *postcopy_data;
bool postcopy_preempt;
@@ -1324,8 +1327,6 @@ static void test_precopy_common(MigrateCommon *args)
return;
}
- migrate_ensure_non_converge(from);
-
if (args->start_hook) {
data_hook = args->start_hook(from, to);
}
@@ -1335,6 +1336,31 @@ static void test_precopy_common(MigrateCommon *args)
wait_for_serial("src_serial");
}
+ if (args->live) {
+ /*
+ * Testing live migration, we want to ensure that some
+ * memory is re-dirtied after being transferred, so that
+ * we exercise logic for dirty page handling. We achieve
+ * this with a ridiculosly low bandwidth that guarantees
+ * non-convergance.
+ */
+ migrate_ensure_non_converge(from);
+ } else {
+ /*
+ * Testing non-live migration, we allow it to run at
+ * full speed to ensure short test case duration.
+ * For tests expected to fail, we don't need to
+ * change anything.
+ */
+ if (args->result == MIG_TEST_SUCCEED) {
+ qtest_qmp_assert_success(from, "{ 'execute' : 'stop'}");
+ if (!got_stop) {
+ qtest_qmp_eventwait(from, "STOP");
+ }
+ migrate_ensure_converge(from);
+ }
+ }
+
if (!args->connect_uri) {
g_autofree char *local_connect_uri =
migrate_get_socket_address(to, "socket-address");
@@ -1352,19 +1378,29 @@ static void test_precopy_common(MigrateCommon *args)
qtest_set_expected_status(to, EXIT_FAILURE);
}
} else {
- wait_for_migration_pass(from);
+ if (args->live) {
+ wait_for_migration_pass(from);
- migrate_ensure_converge(from);
+ migrate_ensure_converge(from);
- /* We do this first, as it has a timeout to stop us
- * hanging forever if migration didn't converge */
- wait_for_migration_complete(from);
+ /*
+ * We do this first, as it has a timeout to stop us
+ * hanging forever if migration didn't converge
+ */
+ wait_for_migration_complete(from);
+
+ if (!got_stop) {
+ qtest_qmp_eventwait(from, "STOP");
+ }
+ } else {
+ wait_for_migration_complete(from);
- if (!got_stop) {
- qtest_qmp_eventwait(from, "STOP");
+ qtest_qmp_assert_success(to, "{ 'execute' : 'cont'}");
}
- qtest_qmp_eventwait(to, "RESUME");
+ if (!got_resume) {
+ qtest_qmp_eventwait(to, "RESUME");
+ }
wait_for_serial("dest_serial");
}
@@ -1382,6 +1418,7 @@ static void test_precopy_unix_plain(void)
MigrateCommon args = {
.listen_uri = uri,
.connect_uri = uri,
+ .live = true,
};
test_precopy_common(&args);
@@ -1397,6 +1434,7 @@ static void test_precopy_unix_dirty_ring(void)
},
.listen_uri = uri,
.connect_uri = uri,
+ .live = true,
};
test_precopy_common(&args);
@@ -1506,6 +1544,7 @@ static void test_precopy_unix_xbzrle(void)
.listen_uri = uri,
.start_hook = test_migrate_xbzrle_start,
+ .live = true,
};
test_precopy_common(&args);
@@ -1906,6 +1945,7 @@ static void test_multifd_tcp_none(void)
MigrateCommon args = {
.listen_uri = "defer",
.start_hook = test_migrate_precopy_tcp_multifd_start,
+ .live = true,
};
test_precopy_common(&args);
}
--
2.40.0
- Re: [PATCH v2 2/6] tests/qtests: remove migration test iterations config, (continued)
[PATCH v2 5/6] tests/qtest: massively speed up migration-tet, Daniel P . Berrangé, 2023/04/21
[PATCH v2 6/6] tests/migration: Only run auto_converge in slow mode, Daniel P . Berrangé, 2023/04/21
RE: [PATCH v2 6/6] tests/migration: Only run auto_converge in slow mode, Zhang, Chen, 2023/04/24
[PATCH v2 4/6] tests/qtest: make more migration pre-copy scenarios run non-live,
Daniel P . Berrangé <=