[PATCH v4 1/2] memory: introduce total_dirty_pages to stat dirty pages

[huangy81]

From: Hyman Huang(黄勇) <huang...@chinatelecom.cn>

introduce global var total_dirty_pages to stat dirty pages
along with memory_global_dirty_log_sync.

Signed-off-by: Hyman Huang(黄勇) <huang...@chinatelecom.cn>
---
 include/exec/ram_addr.h | 4 ++++
 migration/dirtyrate.c   | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 45c9132..e98d665 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -26,6 +26,8 @@
 #include "exec/ramlist.h"
 #include "exec/ramblock.h"
 
+extern uint64_t total_dirty_pages;
+
 /**
  * clear_bmap_size: calculate clear bitmap size
  *
@@ -366,6 +368,7 @@ static inline void 
cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
             for (k = 0; k < nr; k++) {
                 if (bitmap[k]) {
                     unsigned long temp = leul_to_cpu(bitmap[k]);
+                    total_dirty_pages += ctpopl(temp);
 
                     qatomic_or(&blocks[DIRTY_MEMORY_VGA][idx][offset], temp);
 
@@ -403,6 +406,7 @@ static inline void 
cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
         for (i = 0; i < len; i++) {
             if (bitmap[i] != 0) {
                 c = leul_to_cpu(bitmap[i]);
+                total_dirty_pages += ctpopl(c);
                 do {
                     j = ctzl(c);
                     c &= ~(1ul << j);
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index f92c4b4..17b3d2c 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -28,6 +28,13 @@
 #include "sysemu/runstate.h"
 #include "exec/memory.h"
 
+/*
+ * total_dirty_pages is procted by BQL and is used
+ * to stat dirty pages during the period of two
+ * memory_global_dirty_log_sync
+ */
+uint64_t total_dirty_pages;
+
 typedef struct DirtyPageRecord {
     uint64_t start_pages;
     uint64_t end_pages;
-- 
1.8.3.1