[PULL 03/26] migration/dirtyrate: setup up query-dirtyrate framwork

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: Chuan Zheng <zhengchuan@huawei.com>

Add get_dirtyrate_thread() functions to setup query-dirtyrate
framework.

Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Signed-off-by: YanYing Zhuang <ann.zhuangyanying@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <1600237327-33618-2-git-send-email-zhengchuan@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 migration/dirtyrate.c | 38 ++++++++++++++++++++++++++++++++++++++
 migration/dirtyrate.h | 28 ++++++++++++++++++++++++++++
 migration/meson.build |  2 +-
 3 files changed, 67 insertions(+), 1 deletion(-)
 create mode 100644 migration/dirtyrate.c
 create mode 100644 migration/dirtyrate.h

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
new file mode 100644
index 0000000000..bf7fd24e75
--- /dev/null
+++ b/migration/dirtyrate.c
@@ -0,0 +1,38 @@
+/*
+ * Dirtyrate implement code
+ *
+ * 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.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "qemu/config-file.h"
+#include "exec/memory.h"
+#include "exec/ramblock.h"
+#include "exec/target_page.h"
+#include "qemu/rcu_queue.h"
+#include "qapi/qapi-commands-migration.h"
+#include "migration.h"
+#include "dirtyrate.h"
+
+static void calculate_dirtyrate(struct DirtyRateConfig config)
+{
+    /* todo */
+    return;
+}
+
+void *get_dirtyrate_thread(void *arg)
+{
+    struct DirtyRateConfig config = *(struct DirtyRateConfig *)arg;
+
+    calculate_dirtyrate(config);
+
+    return NULL;
+}
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
diff --git a/migration/meson.build b/migration/meson.build
index ac8ff1419f..b5b71c8060 100644
--- a/migration/meson.build
+++ b/migration/meson.build
@@ -37,4 +37,4 @@ softmmu_ss.add(when: ['CONFIG_RDMA', rdma], if_true: files('rdma.c'))
 softmmu_ss.add(when: 'CONFIG_LIVE_BLOCK_MIGRATION', if_true: files('block.c'))
 softmmu_ss.add(when: 'CONFIG_ZSTD', if_true: [files('multifd-zstd.c'), zstd])
 
-specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: files('ram.c'))
+specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: files('dirtyrate.c', 'ram.c'))
-- 
2.26.2