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tests: wait max 120 seconds for migration test status changes

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Currently the wait_for_migration_fail and wait_for_migration_complete
functions will spin in an infinite loop checking query-migrate status
to detect a specific change/goal. This is fine when everything goes
to plan, but when the unusual happens, these will hang the test suite
forever.

Any normally executing migration test case normally takes < 1 second
for a state change, with exception of the autoconverge test which
takes about 5 seconds. Taking into account possibility of people
running tests inside TCG, allowing a factor of x20 slowdown gives
a reasonable worst case of 120 seconds. Anything taking longer than
this is a strong sign that the test has hung, or the test should be
rewritten to be faster.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220628105434.295905-2-berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2022-06-28 11:54:30 +01:00 committed by Thomas Huth
parent 3a751770ee
commit 276dfd03f0
1 changed files with 14 additions and 0 deletions
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14
tests/qtest/migration-helpers.c
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@ -15,6 +15,14 @@
#include "migration-helpers.h"
/*
* Number of seconds we wait when looking for migration
* status changes, to avoid test suite hanging forever
* when things go wrong. Needs to be higher enough to
* avoid false positives on loaded hosts.
*/
#define MIGRATION_STATUS_WAIT_TIMEOUT 120
bool got_stop;
static void check_stop_event(QTestState *who)
@ -166,8 +174,11 @@ static bool check_migration_status(QTestState *who, const char *goal,
void wait_for_migration_status(QTestState *who,
const char *goal, const char **ungoals)
{
g_test_timer_start();
while (!check_migration_status(who, goal, ungoals)) {
usleep(1000);
g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
}
}
@ -178,6 +189,7 @@ void wait_for_migration_complete(QTestState *who)
void wait_for_migration_fail(QTestState *from, bool allow_active)
{
g_test_timer_start();
QDict *rsp_return;
char *status;
bool failed;
@ -193,6 +205,8 @@ void wait_for_migration_fail(QTestState *from, bool allow_active)
g_assert(result);
failed = !strcmp(status, "failed");
g_free(status);
g_assert(g_test_timer_elapsed() < MIGRATION_STATUS_WAIT_TIMEOUT);
} while (!failed);
/* Is the machine currently running? */