[PATCH v2 09/10] migration/dirtyrate: Implement calculate_dirtyrate() function

[Chuan Zheng <zhengchuan@huawei.com>]

From: Zheng Chuan <zhengchuan@huawei.com>

Implement calculate_dirtyrate() function.

Signed-off-by: Zheng Chuan <zhengchuan@huawei.com>
Signed-off-by: YanYing Zhuang <ann.zhuangyanying@huawei.com>
---
 migration/dirtyrate.c | 46 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 54b832a..d487030 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -177,6 +177,21 @@ static void get_ramblock_dirty_info(RAMBlock *block, struct RamblockDirtyInfo *i
     strcpy(info->idstr, qemu_ram_get_idstr(block));
 }
 
+static void free_ramblock_dirty_info(struct RamblockDirtyInfo *infos, int count)
+{
+    int i;
+
+    if (!infos) {
+        return;
+    }
+
+    for (i = 0; i < count; i++) {
+        g_free(infos[i].sample_page_vfn);
+        g_free(infos[i].hash_result);
+    }
+    g_free(infos);
+}
+
 static struct RamblockDirtyInfo *
 alloc_ramblock_dirty_info(int *block_index,
                           struct RamblockDirtyInfo *block_dinfo)
@@ -328,8 +343,35 @@ static int compare_page_hash_info(struct RamblockDirtyInfo *info, int block_inde
 
 static void calculate_dirtyrate(struct DirtyRateConfig config)
 {
-    /* todo */
-    return;
+    struct RamblockDirtyInfo *block_dinfo = NULL;
+    int block_index = 0;
+    int64_t msec = 0;
+    int64_t initial_time;
+
+    rcu_register_thread();
+    reset_dirtyrate_stat();
+    initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+    rcu_read_lock();
+    if (record_ramblock_hash_info(config, &block_dinfo, &block_index) < 0) {
+        goto out;
+    }
+    rcu_read_unlock();
+
+    msec = config.sample_period_seconds * 1000;
+    msec = set_sample_page_period(msec, initial_time);
+
+    rcu_read_lock();
+    if (compare_page_hash_info(block_dinfo, block_index) < 0) {
+        goto out;
+    }
+
+    update_dirtyrate(msec);
+
+out:
+    rcu_read_unlock();
+    free_ramblock_dirty_info(block_dinfo, block_index + 1);
+    rcu_unregister_thread();
+
 }
 
 void *get_dirtyrate_thread(void *arg)
-- 
1.8.3.1