migration: Add dirty_pages_rate to query migrate output
It indicates how many pages were dirtied during the last second.
Signed-off-by: Juan Quintela <quintela@redhat.com>
diff --git a/arch_init.c b/arch_init.c
index d918844..e6effe8 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -369,6 +369,14 @@
RAMBlock *block;
ram_addr_t addr;
uint64_t num_dirty_pages_init = migration_dirty_pages;
+ MigrationState *s = migrate_get_current();
+ static int64_t start_time;
+ static int64_t num_dirty_pages_period;
+ int64_t end_time;
+
+ if (!start_time) {
+ start_time = qemu_get_clock_ms(rt_clock);
+ }
trace_migration_bitmap_sync_start();
memory_global_sync_dirty_bitmap(get_system_memory());
@@ -385,6 +393,16 @@
}
trace_migration_bitmap_sync_end(migration_dirty_pages
- num_dirty_pages_init);
+ num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
+ end_time = qemu_get_clock_ms(rt_clock);
+
+ /* more than 1 second = 1000 millisecons */
+ if (end_time > start_time + 1000) {
+ s->dirty_pages_rate = num_dirty_pages_period * 1000
+ / (end_time - start_time);
+ start_time = end_time;
+ num_dirty_pages_period = 0;
+ }
}