@@ -893,6 +893,34 @@ static bool migrate_show_downtime(MigrationState *s)
return (s->state == MIGRATION_STATUS_COMPLETED) || migration_in_postcopy();
}
+static int64_t migrate_get_downtime_stop(MigrationState *s)
+{
+ return migration_get_timestamp(MIGRATION_DOWNTIME_STOP) -
+ migration_get_timestamp(MIGRATION_DOWNTIME_START);
+}
+
+static int64_t migrate_get_downtime_precopy_iterable(MigrationState *s)
+{
+ return migration_get_timestamp(MIGRATION_DOWNTIME_PRECOPY_ITERABLE) -
+ migration_get_timestamp(MIGRATION_DOWNTIME_STOP);
+}
+
+static int64_t migrate_get_downtime_precopy_noniterable(MigrationState *s)
+{
+ return migration_get_timestamp(MIGRATION_DOWNTIME_PRECOPY_NONITERABLE) -
+ migration_get_timestamp(MIGRATION_DOWNTIME_PRECOPY_ITERABLE);
+}
+
+static int64_t migrate_get_downtime_resume_rp(MigrationState *s)
+{
+ if (migrate_return_path()) {
+ return migration_get_timestamp(MIGRATION_DOWNTIME_RESUME_RETURN_PATH) -
+ migration_get_timestamp(MIGRATION_DOWNTIME_PRECOPY_NONITERABLE);
+ }
+
+ return 0;
+}
+
static void populate_time_info(MigrationInfo *info, MigrationState *s)
{
info->has_status = true;
@@ -2689,6 +2717,12 @@ static void migration_calculate_complete(MigrationState *s)
* postcopy, downtime is calculated during postcopy_start().
*/
s->downtime = end_time - migration_get_timestamp(MIGRATION_DOWNTIME_START);
+
+ trace_source_downtime_stats(s->downtime,
+ migrate_get_downtime_stop(s),
+ migrate_get_downtime_precopy_iterable(s),
+ migrate_get_downtime_precopy_noniterable(s),
+ migrate_get_downtime_resume_rp(s));
}
transfer_time = s->total_time - s->setup_time;
@@ -189,6 +189,7 @@ migrate_transferred(uint64_t transferred, uint64_t time_spent, uint64_t bandwidt
process_incoming_migration_co_end(int ret, int ps) "ret=%d postcopy-state=%d"
process_incoming_migration_co_postcopy_end_main(void) ""
postcopy_preempt_enabled(bool value) "%d"
+source_downtime_stats(int64_t downtime, int64_t stop, int64_t iterable, int64_t non_iterable, int64_t resume_rp) "downtime %"PRIi64": stop %"PRIi64" iterable %"PRIi64" non_iterable %"PRIi64" resume-rp %"PRIi64
# migration-stats
migration_transferred_bytes(uint64_t qemu_file, uint64_t multifd) "qemu_file %" PRIu64 " multifd %" PRIu64
To facilitate understanding of what constitutes downtime, add a tracepoint that gives the downtime breakdown throughout all steps of switchover. Signed-off-by: Joao Martins <joao.m.martins@oracle.com> --- migration/migration.c | 34 ++++++++++++++++++++++++++++++++++ migration/trace-events | 1 + 2 files changed, 35 insertions(+)