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tests/qtest: migration events 

Define a state object to capture events seen by migration tests, to allow
more events to be captured in a subsequent patch, and simplify event
checking in wait_for_migration_pass.  No functional change.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Link: https://lore.kernel.org/r/1704312341-66640-10-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
master
Steve Sistare 2024-01-03 12:05:38 -08:00 committed by Peter Xu
parent 49a5020697
commit f0649758be
3 changed files with 56 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
tests/qtest/migration-helpers.c
View File

@ -24,26 +24,16 @@
*/
#define MIGRATION_STATUS_WAIT_TIMEOUT 120
bool migrate_watch_for_stop(QTestState *who, const char *name,
QDict *event, void *opaque)
{
bool *seen = opaque;
if (g_str_equal(name, "STOP")) {
*seen = true;
return true;
}
return false;
}
bool migrate_watch_for_resume(QTestState *who, const char *name,
bool migrate_watch_for_events(QTestState *who, const char *name,
QDict *event, void *opaque)
{
bool *seen = opaque;
QTestMigrationState *state = opaque;
if (g_str_equal(name, "RESUME")) {
*seen = true;
if (g_str_equal(name, "STOP")) {
state->stop_seen = true;
return true;
} else if (g_str_equal(name, "RESUME")) {
state->resume_seen = true;
return true;
}

9
tests/qtest/migration-helpers.h
View File

@ -15,9 +15,12 @@
#include "libqtest.h"
bool migrate_watch_for_stop(QTestState *who, const char *name,
QDict *event, void *opaque);
bool migrate_watch_for_resume(QTestState *who, const char *name,
typedef struct QTestMigrationState {
bool stop_seen;
bool resume_seen;
} QTestMigrationState;
bool migrate_watch_for_events(QTestState *who, const char *name,
QDict *event, void *opaque);
G_GNUC_PRINTF(3, 4)

91
tests/qtest/migration-test.c
View File

@ -43,8 +43,8 @@
unsigned start_address;
unsigned end_address;
static bool uffd_feature_thread_id;
static bool got_src_stop;
static bool got_dst_resume;
static QTestMigrationState src_state;
static QTestMigrationState dst_state;
/*
* An initial 3 MB offset is used as that corresponds
@ -230,6 +230,20 @@ static void wait_for_serial(const char *side)
} while (true);
}
static void wait_for_stop(QTestState *who, QTestMigrationState *state)
{
if (!state->stop_seen) {
qtest_qmp_eventwait(who, "STOP");
}
}
static void wait_for_resume(QTestState *who, QTestMigrationState *state)
{
if (!state->resume_seen) {
qtest_qmp_eventwait(who, "RESUME");
}
}
/*
* It's tricky to use qemu's migration event capability with qtest,
* events suddenly appearing confuse the qmp()/hmp() responses.
@ -277,21 +291,19 @@ static void read_blocktime(QTestState *who)
qobject_unref(rsp_return);
}
/*
* Wait for two changes in the migration pass count, but bail if we stop.
*/
static void wait_for_migration_pass(QTestState *who)
{
uint64_t initial_pass = get_migration_pass(who);
uint64_t pass;
uint64_t pass, prev_pass = 0, changes = 0;
/* Wait for the 1st sync */
while (!got_src_stop && !initial_pass) {
usleep(1000);
initial_pass = get_migration_pass(who);
}
do {
while (changes < 2 && !src_state.stop_seen) {
usleep(1000);
pass = get_migration_pass(who);
} while (pass == initial_pass && !got_src_stop);
changes += (pass != prev_pass);
prev_pass = pass;
}
}
static void check_guests_ram(QTestState *who)
@ -617,10 +629,7 @@ static void migrate_postcopy_start(QTestState *from, QTestState *to)
{
qtest_qmp_assert_success(from, "{ 'execute': 'migrate-start-postcopy' }");
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
qtest_qmp_eventwait(to, "RESUME");
}
@ -756,8 +765,8 @@ static int test_migrate_start(QTestState **from, QTestState **to,
}
}
got_src_stop = false;
got_dst_resume = false;
dst_state = (QTestMigrationState) { };
src_state = (QTestMigrationState) { };
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
memory_size = "150M";
@ -848,8 +857,8 @@ static int test_migrate_start(QTestState **from, QTestState **to,
if (!args->only_target) {
*from = qtest_init_with_env(QEMU_ENV_SRC, cmd_source);
qtest_qmp_set_event_callback(*from,
migrate_watch_for_stop,
&got_src_stop);
migrate_watch_for_events,
&src_state);
}
cmd_target = g_strdup_printf("-accel kvm%s -accel tcg "
@ -869,8 +878,8 @@ static int test_migrate_start(QTestState **from, QTestState **to,
ignore_stderr);
*to = qtest_init_with_env(QEMU_ENV_DST, cmd_target);
qtest_qmp_set_event_callback(*to,
migrate_watch_for_resume,
&got_dst_resume);
migrate_watch_for_events,
&dst_state);
/*
* Remove shmem file immediately to avoid memory leak in test failed case.
@ -1717,9 +1726,7 @@ static void test_precopy_common(MigrateCommon *args)
*/
if (args->result == MIG_TEST_SUCCEED) {
qtest_qmp_assert_success(from, "{ 'execute' : 'stop'}");
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
migrate_ensure_converge(from);
}
}
@ -1765,9 +1772,8 @@ static void test_precopy_common(MigrateCommon *args)
*/
wait_for_migration_complete(from);
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
} else {
wait_for_migration_complete(from);
/*
@ -1780,9 +1786,7 @@ static void test_precopy_common(MigrateCommon *args)
qtest_qmp_assert_success(to, "{ 'execute' : 'cont'}");
}
if (!got_dst_resume) {
qtest_qmp_eventwait(to, "RESUME");
}
wait_for_resume(to, &dst_state);
wait_for_serial("dest_serial");
}
@ -1821,9 +1825,7 @@ static void test_file_common(MigrateCommon *args, bool stop_src)
if (stop_src) {
qtest_qmp_assert_success(from, "{ 'execute' : 'stop'}");
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
}
if (args->result == MIG_TEST_QMP_ERROR) {
@ -1844,10 +1846,7 @@ static void test_file_common(MigrateCommon *args, bool stop_src)
if (stop_src) {
qtest_qmp_assert_success(to, "{ 'execute' : 'cont'}");
}
if (!got_dst_resume) {
qtest_qmp_eventwait(to, "RESUME");
}
wait_for_resume(to, &dst_state);
wait_for_serial("dest_serial");
@ -1966,9 +1965,7 @@ static void test_ignore_shared(void)
migrate_wait_for_dirty_mem(from, to);
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
qtest_qmp_eventwait(to, "RESUME");
@ -2503,7 +2500,7 @@ static void test_migrate_auto_converge(void)
break;
}
usleep(20);
g_assert_false(got_src_stop);
g_assert_false(src_state.stop_seen);
} while (true);
/* The first percentage of throttling should be at least init_pct */
g_assert_cmpint(percentage, >=, init_pct);
@ -2842,9 +2839,7 @@ static void test_multifd_tcp_cancel(void)
migrate_ensure_converge(from);
if (!got_src_stop) {
qtest_qmp_eventwait(from, "STOP");
}
wait_for_stop(from, &src_state);
qtest_qmp_eventwait(to2, "RESUME");
wait_for_serial("dest_serial");
@ -3177,7 +3172,7 @@ static void test_migrate_dirty_limit(void)
throttle_us_per_full =
read_migrate_property_int(from, "dirty-limit-throttle-time-per-round");
usleep(100);
g_assert_false(got_src_stop);
g_assert_false(src_state.stop_seen);
}
/* Now cancel migrate and wait for dirty limit throttle switch off */
@ -3189,7 +3184,7 @@ static void test_migrate_dirty_limit(void)
throttle_us_per_full =
read_migrate_property_int(from, "dirty-limit-throttle-time-per-round");
usleep(100);
g_assert_false(got_src_stop);
g_assert_false(src_state.stop_seen);
} while (throttle_us_per_full != 0 && --max_try_count);
/* Assert dirty limit is not in service */
@ -3218,7 +3213,7 @@ static void test_migrate_dirty_limit(void)
throttle_us_per_full =
read_migrate_property_int(from, "dirty-limit-throttle-time-per-round");
usleep(100);
g_assert_false(got_src_stop);
g_assert_false(src_state.stop_seen);
}
/*