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tests/migration: Add case for periodic ramblock dirty sync

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Signed-off-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/cb61504f1a1e9d5f2ca4dac12e518deb076ce9f3.1729146786.git.yong.huang@smartx.com
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Hyman Huang 2024-10-17 14:42:55 +08:00 committed by Peter Xu
parent 52ac968ab2
commit bfd66ccb8d
1 changed files with 32 additions and 0 deletions
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32
tests/qtest/migration-test.c
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@ -2791,6 +2791,8 @@ static void test_migrate_auto_converge(void)
* so we need to decrease a bandwidth.
*/
const int64_t init_pct = 5, inc_pct = 25, max_pct = 95;
uint64_t prev_dirty_sync_cnt, dirty_sync_cnt;
int max_try_count, hit = 0;
if (test_migrate_start(&from, &to, uri, &args)) {
return;
@ -2827,6 +2829,36 @@ static void test_migrate_auto_converge(void)
} while (true);
/* The first percentage of throttling should be at least init_pct */
g_assert_cmpint(percentage, >=, init_pct);
/*
* End the loop when the dirty sync count greater than 1.
*/
while ((dirty_sync_cnt = get_migration_pass(from)) < 2) {
usleep(1000 * 1000);
}
prev_dirty_sync_cnt = dirty_sync_cnt;
/*
* The RAMBlock dirty sync count must changes in 5 seconds, here we set
* the timeout to 10 seconds to ensure it changes.
*
* Note that migrate_ensure_non_converge set the max-bandwidth to 3MB/s,
* while the qtest mem is >= 100MB, one iteration takes at least 33s (100/3)
* to complete; this ensures that the RAMBlock dirty sync occurs.
*/
max_try_count = 10;
while (--max_try_count) {
dirty_sync_cnt = get_migration_pass(from);
if (dirty_sync_cnt != prev_dirty_sync_cnt) {
hit = 1;
break;
}
prev_dirty_sync_cnt = dirty_sync_cnt;
sleep(1);
}
g_assert_cmpint(hit, ==, 1);
/* Now, when we tested that throttling works, let it converge */
migrate_ensure_converge(from);