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[Qemu-devel] [PATCH 09/31] ram: Move dup_pages into RAMState
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 09/31] ram: Move dup_pages into RAMState |
Date: |
Wed, 15 Mar 2017 14:49:59 +0100 |
Once there rename it to its actual meaning, zero_pages.
Signed-off-by: Juan Quintela <address@hidden>
---
migration/ram.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 6cdad06..059e9f1 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -159,6 +159,9 @@ struct RAMState {
uint64_t xbzrle_cache_miss_prev;
/* number of iterations at the beggining of period */
uint64_t iterations_prev;
+ /* Accounting fields */
+ /* number of zero pages. It used to be pages filled by the same char. */
+ uint64_t zero_pages;
};
typedef struct RAMState RAMState;
@@ -166,7 +169,6 @@ static RAMState ram_state;
/* accounting for migration statistics */
typedef struct AccountingInfo {
- uint64_t dup_pages;
uint64_t skipped_pages;
uint64_t norm_pages;
uint64_t iterations;
@@ -186,12 +188,12 @@ static void acct_clear(void)
uint64_t dup_mig_bytes_transferred(void)
{
- return acct_info.dup_pages * TARGET_PAGE_SIZE;
+ return ram_state.zero_pages * TARGET_PAGE_SIZE;
}
uint64_t dup_mig_pages_transferred(void)
{
- return acct_info.dup_pages;
+ return ram_state.zero_pages;
}
uint64_t skipped_mig_bytes_transferred(void)
@@ -718,13 +720,14 @@ static void migration_bitmap_sync(RAMState *rs)
* @p: pointer to the page
* @bytes_transferred: increase it with the number of transferred bytes
*/
-static int save_zero_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
+static int save_zero_page(RAMState *rs, QEMUFile *f, RAMBlock *block,
+ ram_addr_t offset,
uint8_t *p, uint64_t *bytes_transferred)
{
int pages = -1;
if (is_zero_range(p, TARGET_PAGE_SIZE)) {
- acct_info.dup_pages++;
+ rs->zero_pages++;
*bytes_transferred += save_page_header(f, block,
offset |
RAM_SAVE_FLAG_COMPRESS);
qemu_put_byte(f, 0);
@@ -797,11 +800,11 @@ static int ram_save_page(RAMState *rs, MigrationState
*ms, QEMUFile *f,
if (bytes_xmit > 0) {
acct_info.norm_pages++;
} else if (bytes_xmit == 0) {
- acct_info.dup_pages++;
+ rs->zero_pages++;
}
}
} else {
- pages = save_zero_page(f, block, offset, p, bytes_transferred);
+ pages = save_zero_page(rs, f, block, offset, p, bytes_transferred);
if (pages > 0) {
/* Must let xbzrle know, otherwise a previous (now 0'd) cached
* page would be stale
@@ -973,7 +976,7 @@ static int ram_save_compressed_page(RAMState *rs,
MigrationState *ms,
if (bytes_xmit > 0) {
acct_info.norm_pages++;
} else if (bytes_xmit == 0) {
- acct_info.dup_pages++;
+ rs->zero_pages++;
}
}
} else {
@@ -985,7 +988,7 @@ static int ram_save_compressed_page(RAMState *rs,
MigrationState *ms,
*/
if (block != rs->last_sent_block) {
flush_compressed_data(f);
- pages = save_zero_page(f, block, offset, p, bytes_transferred);
+ pages = save_zero_page(rs, f, block, offset, p, bytes_transferred);
if (pages == -1) {
/* Make sure the first page is sent out before other pages */
bytes_xmit = save_page_header(f, block, offset |
@@ -1006,7 +1009,7 @@ static int ram_save_compressed_page(RAMState *rs,
MigrationState *ms,
}
} else {
offset |= RAM_SAVE_FLAG_CONTINUE;
- pages = save_zero_page(f, block, offset, p, bytes_transferred);
+ pages = save_zero_page(rs, f, block, offset, p, bytes_transferred);
if (pages == -1) {
pages = compress_page_with_multi_thread(f, block, offset,
bytes_transferred);
@@ -1428,7 +1431,7 @@ void acct_update_position(QEMUFile *f, size_t size, bool
zero)
{
uint64_t pages = size / TARGET_PAGE_SIZE;
if (zero) {
- acct_info.dup_pages += pages;
+ ram_state.zero_pages += pages;
} else {
acct_info.norm_pages += pages;
bytes_transferred += size;
@@ -1941,6 +1944,7 @@ static int ram_save_init_globals(RAMState *rs)
rs->dirty_rate_high_cnt = 0;
rs->bitmap_sync_count = 0;
+ rs->zero_pages = 0;
migration_bitmap_sync_init(rs);
qemu_mutex_init(&migration_bitmap_mutex);
--
2.9.3
- [Qemu-devel] [PATCH 01/31] ram: move more fields into RAMState, (continued)
- [Qemu-devel] [PATCH 01/31] ram: move more fields into RAMState, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 07/31] ram: Move xbzrle_cache_miss_prev into RAMState, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 10/31] ram: Remove unused dump_mig_dbytes_transferred(), Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 12/31] ram: Move norm_pages to RAMState, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 09/31] ram: Move dup_pages into RAMState,
Juan Quintela <=
- [Qemu-devel] [PATCH 13/31] ram: Remove norm_mig_bytes_transferred, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 14/31] ram: Move iterations into RAMState, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 11/31] ram: Remove unused pages_skiped variable, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 15/31] ram: Move xbzrle_bytes into RAMState, Juan Quintela, 2017/03/15
- [Qemu-devel] [PATCH 19/31] ram: move xbzrle_overflows into RAMState, Juan Quintela, 2017/03/15