[Qemu-devel] [PATCH v8 18/20] migration: Rename initial_bytes

[Juan Quintela <quintela@redhat.com>]

Now it is called qemu_file_bytes that reflects better what it does,
and we create qemu_file_bytes_now to not have to call qemu_ftell() twice.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 migration/migration.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index 674c254c3f..67f3375ddc 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2065,13 +2065,13 @@ static void *migration_thread(void *opaque)
     /* Used by the bandwidth calcs, updated later */
     int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
     int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
-    int64_t initial_bytes = 0;
     /*
      * The final stage happens when the remaining data is smaller than
      * this threshold; it's calculated from the requested downtime and
      * measured bandwidth
      */
     int64_t threshold_size = 0;
+    int64_t qemu_file_bytes = 0;
     int64_t start_time = initial_time;
     int64_t end_time;
     bool old_vm_running = false;
@@ -2159,8 +2159,9 @@ static void *migration_thread(void *opaque)
         }
         current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
         if (current_time >= initial_time + BUFFER_DELAY) {
-            uint64_t transferred_bytes = qemu_ftell(s->to_dst_file) -
-                                         initial_bytes;
+            uint64_t qemu_file_bytes_now = qemu_ftell(s->to_dst_file);
+            uint64_t transferred_bytes =
+                qemu_file_bytes_now - qemu_file_bytes;
             uint64_t time_spent = current_time - initial_time;
             double bandwidth = (double)transferred_bytes / time_spent;
             threshold_size = bandwidth * s->parameters.downtime_limit;
@@ -2179,7 +2180,7 @@ static void *migration_thread(void *opaque)
 
             qemu_file_reset_rate_limit(s->to_dst_file);
             initial_time = current_time;
-            initial_bytes = qemu_ftell(s->to_dst_file);
+            qemu_file_bytes = qemu_file_bytes_now;
         }
         if (qemu_file_rate_limit(s->to_dst_file)) {
             /* usleep expects microseconds */
-- 
2.13.5