From 886dfe9db39ac9625dfa2da40b50a2e3534b5470 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Tue, 28 Jun 2022 11:54:33 +0100 Subject: [PATCH] tests: use consistent bandwidth/downtime limits in migration tests MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The different migration test cases are using a variety of settings to ensure convergance/non-convergance. Introduce two helpers to extra the common functionality and ensure consistency. * Non-convergance: 1ms downtime, 30mbs bandwidth * Convergance: 30s downtime, 1gbs bandwidth Signed-off-by: Daniel P. Berrangé Reviewed-by: Dr. David Alan Gilbert Message-Id: <20220628105434.295905-5-berrange@redhat.com> Signed-off-by: Thomas Huth --- tests/qtest/migration-test.c | 54 +++++++++++++----------------------- 1 file changed, 20 insertions(+), 34 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index a54eff6d56..9e64125f02 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -46,9 +46,6 @@ unsigned start_address; unsigned end_address; static bool uffd_feature_thread_id; -/* A downtime where the test really should converge */ -#define CONVERGE_DOWNTIME (1000 * 30) - #if defined(__linux__) #include #include @@ -402,6 +399,20 @@ static void migrate_set_parameter_str(QTestState *who, const char *parameter, migrate_check_parameter_str(who, parameter, value); } +static void migrate_ensure_non_converge(QTestState *who) +{ + /* Can't converge with 1ms downtime + 30 mbs bandwidth limit */ + migrate_set_parameter_int(who, "max-bandwidth", 30 * 1000 * 1000); + migrate_set_parameter_int(who, "downtime-limit", 1); +} + +static void migrate_ensure_converge(QTestState *who) +{ + /* Should converge with 30s downtime + 1 gbs bandwidth limit */ + migrate_set_parameter_int(who, "max-bandwidth", 1 * 1000 * 1000 * 1000); + migrate_set_parameter_int(who, "downtime-limit", 30 * 1000); +} + static void migrate_pause(QTestState *who) { QDict *rsp; @@ -984,12 +995,7 @@ static int migrate_postcopy_prepare(QTestState **from_ptr, migrate_set_capability(to, "postcopy-ram", true); migrate_set_capability(to, "postcopy-blocktime", true); - /* 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. - */ - migrate_set_parameter_int(from, "max-bandwidth", 30000000); - migrate_set_parameter_int(from, "downtime-limit", 1); + migrate_ensure_non_converge(from); /* Wait for the first serial output from the source */ wait_for_serial("src_serial"); @@ -1188,15 +1194,7 @@ static void test_precopy_common(MigrateCommon *args) 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_ensure_non_converge(from); if (args->start_hook) { data_hook = args->start_hook(from, to); @@ -1230,7 +1228,7 @@ static void test_precopy_common(MigrateCommon *args) wait_for_migration_pass(from); } - migrate_set_parameter_int(from, "downtime-limit", CONVERGE_DOWNTIME); + migrate_ensure_converge(from); /* We do this first, as it has a timeout to stop us * hanging forever if migration didn't converge */ @@ -1694,8 +1692,7 @@ static void test_migrate_auto_converge(void) * 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 */ + migrate_ensure_non_converge(from); /* To check remaining size after precopy */ migrate_set_capability(from, "pause-before-switchover", true); @@ -2000,15 +1997,7 @@ static void test_multifd_tcp_cancel(void) 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); - /* 300MB/s */ - migrate_set_parameter_int(from, "max-bandwidth", 30000000); + migrate_ensure_non_converge(from); migrate_set_parameter_int(from, "multifd-channels", 16); migrate_set_parameter_int(to, "multifd-channels", 16); @@ -2054,10 +2043,7 @@ static void test_multifd_tcp_cancel(void) wait_for_migration_status(from, "cancelled", NULL); - /* 300ms it should converge */ - migrate_set_parameter_int(from, "downtime-limit", 300); - /* 1GB/s */ - migrate_set_parameter_int(from, "max-bandwidth", 1000000000); + migrate_ensure_converge(from); migrate_qmp(from, uri, "{}");