mirror of https://gitee.com/openkylin/qemu.git
tests/migration: Add a test for auto converge
Signed-off-by: Yury Kotov <yury-kotov@yandex-team.ru> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190909131335.16848-4-yury-kotov@yandex-team.ru> [Reorganize check_migration_status for rebase. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -240,6 +240,17 @@ static int64_t read_ram_property_int(QTestState *who, const char *property)
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return result;
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}
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static int64_t read_migrate_property_int(QTestState *who, const char *property)
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{
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QDict *rsp_return;
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int64_t result;
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rsp_return = migrate_query(who);
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result = qdict_get_try_int(rsp_return, property, 0);
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qobject_unref(rsp_return);
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return result;
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}
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static uint64_t get_migration_pass(QTestState *who)
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{
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return read_ram_property_int(who, "dirty-sync-count");
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@ -254,32 +265,46 @@ static void read_blocktime(QTestState *who)
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qobject_unref(rsp_return);
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}
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static bool check_migration_status(QTestState *who, const char *goal,
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const char **ungoals)
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{
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bool ready;
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char *current_status;
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const char **ungoal;
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current_status = migrate_query_status(who);
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ready = strcmp(current_status, goal) == 0;
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if (!ungoals) {
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g_assert_cmpstr(current_status, !=, "failed");
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/*
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* If looking for a state other than completed,
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* completion of migration would cause the test to
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* hang.
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*/
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if (strcmp(goal, "completed") != 0) {
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g_assert_cmpstr(current_status, !=, "completed");
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}
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} else {
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for (ungoal = ungoals; *ungoal; ungoal++) {
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g_assert_cmpstr(current_status, !=, *ungoal);
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}
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}
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g_free(current_status);
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return ready;
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}
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static void wait_for_migration_status(QTestState *who,
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const char *goal,
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const char **ungoals)
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{
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while (true) {
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bool completed;
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char *status;
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const char **ungoal;
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status = migrate_query_status(who);
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completed = strcmp(status, goal) == 0;
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for (ungoal = ungoals; *ungoal; ungoal++) {
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g_assert_cmpstr(status, !=, *ungoal);
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}
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g_free(status);
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if (completed) {
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return;
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}
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while (!check_migration_status(who, goal, ungoals)) {
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usleep(1000);
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}
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}
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static void wait_for_migration_complete(QTestState *who)
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{
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wait_for_migration_status(who, "completed",
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(const char * []) { "failed", NULL });
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wait_for_migration_status(who, "completed", NULL);
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}
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static void wait_for_migration_pass(QTestState *who)
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@ -450,6 +475,17 @@ static void migrate_pause(QTestState *who)
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qobject_unref(rsp);
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}
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static void migrate_continue(QTestState *who, const char *state)
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{
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QDict *rsp;
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rsp = wait_command(who,
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"{ 'execute': 'migrate-continue',"
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" 'arguments': { 'state': %s } }",
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state);
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qobject_unref(rsp);
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}
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static void migrate_recover(QTestState *who, const char *uri)
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{
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QDict *rsp;
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@ -814,9 +850,7 @@ static void test_postcopy_recovery(void)
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* Wait until postcopy is really started; we can only run the
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* migrate-pause command during a postcopy
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*/
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wait_for_migration_status(from, "postcopy-active",
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(const char * []) { "failed",
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"completed", NULL });
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wait_for_migration_status(from, "postcopy-active", NULL);
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/*
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* Manually stop the postcopy migration. This emulates a network
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@ -1210,6 +1244,89 @@ static void test_validate_uuid_dst_not_set(void)
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false, true);
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}
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static void test_migrate_auto_converge(void)
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{
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char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
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QTestState *from, *to;
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int64_t remaining, percentage;
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/*
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* We want the test to be stable and as fast as possible.
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* E.g., with 1Gb/s bandwith migration may pass without throttling,
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* so we need to decrease a bandwidth.
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*/
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const int64_t init_pct = 5, inc_pct = 50, max_pct = 95;
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const int64_t max_bandwidth = 400000000; /* ~400Mb/s */
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const int64_t downtime_limit = 250; /* 250ms */
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/*
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* We migrate through unix-socket (> 500Mb/s).
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* Thus, expected migration speed ~= bandwidth limit (< 500Mb/s).
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* So, we can predict expected_threshold
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*/
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const int64_t expected_threshold = max_bandwidth * downtime_limit / 1000;
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if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
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return;
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}
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migrate_set_capability(from, "auto-converge", true);
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migrate_set_parameter_int(from, "cpu-throttle-initial", init_pct);
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migrate_set_parameter_int(from, "cpu-throttle-increment", inc_pct);
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migrate_set_parameter_int(from, "max-cpu-throttle", max_pct);
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/*
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* Set the initial parameters so that the migration could not converge
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* without throttling.
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*/
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migrate_set_parameter_int(from, "downtime-limit", 1);
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migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb/s */
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/* To check remaining size after precopy */
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migrate_set_capability(from, "pause-before-switchover", true);
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/* Wait for the first serial output from the source */
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wait_for_serial("src_serial");
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migrate(from, uri, "{}");
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/* Wait for throttling begins */
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percentage = 0;
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while (percentage == 0) {
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percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
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usleep(100);
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g_assert_false(got_stop);
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}
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/* The first percentage of throttling should be equal to init_pct */
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g_assert_cmpint(percentage, ==, init_pct);
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/* Now, when we tested that throttling works, let it converge */
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migrate_set_parameter_int(from, "downtime-limit", downtime_limit);
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migrate_set_parameter_int(from, "max-bandwidth", max_bandwidth);
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/*
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* Wait for pre-switchover status to check last throttle percentage
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* and remaining. These values will be zeroed later
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*/
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wait_for_migration_status(from, "pre-switchover", NULL);
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/* The final percentage of throttling shouldn't be greater than max_pct */
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percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
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g_assert_cmpint(percentage, <=, max_pct);
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remaining = read_ram_property_int(from, "remaining");
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g_assert_cmpint(remaining, <, expected_threshold);
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migrate_continue(from, "pre-switchover");
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qtest_qmp_eventwait(to, "RESUME");
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wait_for_serial("dest_serial");
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wait_for_migration_complete(from);
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g_free(uri);
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test_migrate_end(from, to, true);
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}
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int main(int argc, char **argv)
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{
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char template[] = "/tmp/migration-test-XXXXXX";
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@ -1272,6 +1389,8 @@ int main(int argc, char **argv)
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qtest_add_func("/migration/validate_uuid_dst_not_set",
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test_validate_uuid_dst_not_set);
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qtest_add_func("/migration/auto_converge", test_migrate_auto_converge);
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ret = g_test_run();
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g_assert_cmpint(ret, ==, 0);
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