[Qemu-devel] [PATCH 14/14] migration: print times for end phase

[Juan Quintela <quintela@redhat.com>]

Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 block.c     |  6 ++++++
 cpus.c      | 17 +++++++++++++++++
 migration.c | 10 +++++++++-
 savevm.c    | 13 +++++++++++++
 4 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/block.c b/block.c
index e78039b..d6e7a59 100644
--- a/block.c
+++ b/block.c
@@ -2269,9 +2269,15 @@ int bdrv_get_flags(BlockDriverState *bs)
 void bdrv_flush_all(void)
 {
     BlockDriverState *bs;
+    int64_t start_time, end_time;
+
+    start_time = qemu_get_clock_ms(rt_clock);

     QTAILQ_FOREACH(bs, &bdrv_states, list) {
         bdrv_flush(bs);
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time flush device %s: %ld\n", bs->filename,
+               end_time - start_time);
     }
 }

diff --git a/cpus.c b/cpus.c
index 1b7061a..0ccc1e0 100644
--- a/cpus.c
+++ b/cpus.c
@@ -439,14 +439,31 @@ int cpu_is_stopped(CPUArchState *env)

 static void do_vm_stop(RunState state)
 {
+    int64_t start_time, end_time;
+
     if (runstate_is_running()) {
+        start_time = qemu_get_clock_ms(rt_clock);
         cpu_disable_ticks();
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time cpu_disable_ticks %ld\n", end_time - start_time);
         pause_all_vcpus();
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time pause_all_vcpus %ld\n", end_time - start_time);
         runstate_set(state);
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time runstate_set %ld\n", end_time - start_time);
         vm_state_notify(0, state);
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time vmstate_notify %ld\n", end_time - start_time);
         bdrv_drain_all();
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time bdrv_drain_all %ld\n", end_time - start_time);
         bdrv_flush_all();
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time bdrv_flush_all %ld\n", end_time - start_time);
         monitor_protocol_event(QEVENT_STOP, NULL);
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("time monitor_protocol_event %ld\n", end_time - start_time);
     }
 }

diff --git a/migration.c b/migration.c
index 8054a77..9c62614 100644
--- a/migration.c
+++ b/migration.c
@@ -340,18 +340,24 @@ bool migrate_fd_put_ready(MigrationState *s, uint64_t max_size)
         DPRINTF("done iterating\n");
         start_time = qemu_get_clock_ms(rt_clock);
         qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("wakeup_request %ld\n", end_time - start_time);
         if (old_vm_running) {
             vm_stop(RUN_STATE_FINISH_MIGRATE);
         } else {
             vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
         }
-
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("vm_stop 2 %ld\n", end_time - start_time);
         if (qemu_savevm_state_complete(s->file) < 0) {
             migrate_fd_error(s);
         } else {
+            end_time = qemu_get_clock_ms(rt_clock);
+            printf("complete without error 3a %ld\n", end_time - start_time);
             migrate_fd_completed(s);
         }
         end_time = qemu_get_clock_ms(rt_clock);
+        printf("completed %ld\n", end_time - start_time);
         s->total_time = end_time - s->total_time;
         s->downtime = end_time - start_time;
         if (s->state != MIG_STATE_COMPLETED) {
@@ -359,6 +365,8 @@ bool migrate_fd_put_ready(MigrationState *s, uint64_t max_size)
                 vm_start();
             }
         }
+        end_time = qemu_get_clock_ms(rt_clock);
+        printf("end completed stage %ld\n", end_time - start_time);
         last_round = true;
     }
     qemu_mutex_unlock_iothread();
diff --git a/savevm.c b/savevm.c
index bdc70c2..ba399f1 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1629,9 +1629,14 @@ int qemu_savevm_state_complete(QEMUFile *f)
 {
     SaveStateEntry *se;
     int ret;
+    int64_t t1;
+    int64_t t0 = qemu_get_clock_ms(rt_clock);

     cpu_synchronize_all_states();
+    t1 = qemu_get_clock_ms(rt_clock);
+    printf("synchronize_all_states %ld\n", t1 - t0);

+    t0 = t1;
     QTAILQ_FOREACH(se, &savevm_handlers, entry) {
         if (!se->ops || !se->ops->save_live_complete) {
             continue;
@@ -1652,6 +1657,11 @@ int qemu_savevm_state_complete(QEMUFile *f)
             return ret;
         }
     }
+    t1 = qemu_get_clock_ms(rt_clock);
+
+    printf("migrate RAM %ld\n", t1 - t0);
+
+    t0 = t1;

     QTAILQ_FOREACH(se, &savevm_handlers, entry) {
         int len;
@@ -1676,6 +1686,9 @@ int qemu_savevm_state_complete(QEMUFile *f)
         trace_savevm_section_end(se->section_id);
     }

+    t1 = qemu_get_clock_ms(rt_clock);
+
+    printf("migrate rest devices %ld\n", t1 - t0);
     qemu_put_byte(f, QEMU_VM_EOF);

     return qemu_file_get_error(f);
-- 
1.7.11.4