[v4,03/12] migration/dirtyrate: Add RamlockDirtyInfo to store sampled page info

Commit Message

Zheng Chuan Aug. 24, 2020, 3:51 a.m. UTC

Add RamlockDirtyInfo to store sampled page info of each ramblock.

Signed-off-by: Chuan Zheng <[e-mail]>
---
 migration/dirtyrate.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Patch

diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
index 33669b7..70000da 100644
--- a/migration/dirtyrate.h
+++ b/migration/dirtyrate.h
@@ -19,6 +19,11 @@ 
  */
 #define DIRTYRATE_DEFAULT_SAMPLE_PAGES            512
 
+/*
+ * Record ramblock idstr
+ */
+#define RAMBLOCK_INFO_MAX_LEN                     256
+
 /* Take 1s as default for calculation duration */
 #define DEFAULT_FETCH_DIRTYRATE_TIME_SEC          1
 
@@ -27,6 +32,19 @@  struct DirtyRateConfig {
     int64_t sample_period_seconds; /* time duration between two sampling */
 };
 
+/*
+ * Store dirtypage info for each ramblock.
+ */
+struct RamblockDirtyInfo {
+    char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */
+    uint8_t *ramblock_addr; /* base address of ramblock we measure */
+    uint64_t ramblock_pages; /* ramblock size in 4K-page */
+    uint64_t *sample_page_vfn; /* relative offset address for sampled page */
+    uint64_t sample_pages_count; /* count of sampled pages */
+    uint64_t sample_dirty_count; /* cout of dirty pages we measure */
+    uint32_t *hash_result; /* array of hash result for sampled pages */
+};
+
 void *get_dirtyrate_thread(void *arg);
 #endif