1 files changed, 28 insertions, 0 deletions
diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
new file mode 100644
index 0000000000..84ab9409ac
--- /dev/null
+++ b/migration/dirtyrate.h
@@ -0,0 +1,28 @@
+/*
+ *  Dirtyrate common functions
+ *
+ *  Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ *  Authors:
+ *  Chuan Zheng <zhengchuan@huawei.com>
+ *
+ *  This work is licensed under the terms of the GNU GPL, version 2 or later.
+ *  See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_MIGRATION_DIRTYRATE_H
+#define QEMU_MIGRATION_DIRTYRATE_H
+
+/*
+ * Sample 512 pages per GB as default.
+ * TODO: Make it configurable.
+ */
+#define DIRTYRATE_DEFAULT_SAMPLE_PAGES            512
+
+struct DirtyRateConfig {
+    uint64_t sample_pages_per_gigabytes; /* sample pages per GB */
+    int64_t sample_period_seconds; /* time duration between two sampling */
+};
+
+void *get_dirtyrate_thread(void *arg);
+#endif