diff mbox series

[v2,02/10] migration/dirtyrate: Add RamlockDirtyInfo to store sampled page info

Message ID 1597397532-68043-3-git-send-email-zhengchuan@huawei.com
State New
Headers show
Series *** A Method for evaluating dirty page rate *** | expand

Commit Message

Zheng Chuan Aug. 14, 2020, 9:32 a.m. UTC 
From: Zheng Chuan <zhengchuan@huawei.com>

Add RamlockDirtyInfo to store sampled page info of each ramblock.

Signed-off-by: Zheng Chuan <zhengchuan@huawei.com>
---
 migration/dirtyrate.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
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Patch

diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
index 914c363..9650566 100644
--- a/migration/dirtyrate.h
+++ b/migration/dirtyrate.h
@@ -19,6 +19,11 @@ 
  */
 #define DIRTYRATE_DEFAULT_SAMPLE_PAGES            256
 
+/*
+ * Record ramblock idstr
+ */
+#define RAMBLOCK_INFO_MAX_LEN                     256
+
 /* Take 1s as default for calculation duration */
 #define DEFAULT_FETCH_DIRTYRATE_TIME_SEC          1
 
@@ -39,6 +44,19 @@  typedef enum {
     CAL_DIRTY_RATE_END,
 } CalculatingDirtyRateState;
 
+/*
+ * 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 */
+    size_t ramblock_pages; /* sum of dividation by 4K pages for ramblock */
+    size_t *sample_page_vfn; /* relative offset address for sampled page */
+    unsigned int sample_pages_count; /* sum of sampled pages */
+    unsigned int sample_dirty_count; /* sum of dirty pages we measure */
+    uint8_t *hash_result; /* array of hash result for sampled pages */
+};
+
 void *get_dirtyrate_thread(void *arg);
 #endif