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;
+ }
}
diff --git a/hmp.c b/hmp.c
index 96e2174..2b97982 100644
--- a/hmp.c
+++ b/hmp.c
@@ -175,6 +175,10 @@
info->ram->normal);
monitor_printf(mon, "normal bytes: %" PRIu64 " kbytes\n",
info->ram->normal_bytes >> 10);
+ if (info->ram->dirty_pages_rate) {
+ monitor_printf(mon, "dirty pages rate: %" PRIu64 " pages\n",
+ info->ram->dirty_pages_rate);
+ }
}
if (info->has_disk) {
diff --git a/migration.c b/migration.c
index 8d3e018..330c16a 100644
--- a/migration.c
+++ b/migration.c
@@ -180,6 +180,8 @@
info->ram->duplicate = dup_mig_pages_transferred();
info->ram->normal = norm_mig_pages_transferred();
info->ram->normal_bytes = norm_mig_bytes_transferred();
+ info->ram->dirty_pages_rate = s->dirty_pages_rate;
+
if (blk_mig_active()) {
info->has_disk = true;
diff --git a/migration.h b/migration.h
index 552200c..66d7f68 100644
--- a/migration.h
+++ b/migration.h
@@ -42,6 +42,7 @@
int64_t total_time;
int64_t downtime;
int64_t expected_downtime;
+ int64_t dirty_pages_rate;
bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
int64_t xbzrle_cache_size;
};
diff --git a/qapi-schema.json b/qapi-schema.json
index bcb5edb..c615ee2 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -383,13 +383,17 @@
#
# @normal : number of normal pages (since 1.2)
#
-# @normal-bytes : number of normal bytes sent (since 1.2)
+# @normal-bytes: number of normal bytes sent (since 1.2)
+#
+# @dirty-pages-rate: number of pages dirtied by second by the
+# guest (since 1.3)
#
# Since: 0.14.0
##
{ 'type': 'MigrationStats',
'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
- 'duplicate': 'int', 'normal': 'int', 'normal-bytes': 'int' } }
+ 'duplicate': 'int', 'normal': 'int', 'normal-bytes': 'int',
+ 'dirty-pages-rate' : 'int' } }
##
# @XBZRLECacheStats