diff options
| author | Chao Fan <fanc.fnst@cn.fujitsu.com> | 2017-03-14 09:55:07 +0800 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2017-03-16 08:55:56 +0100 |
| commit | 1ffb5dfd35888cd9de78cc97d3e3e3cb1f3c4887 (patch) | |
| tree | 17af5040ece1efd2a522516066a5c8591b35e26e /include/exec | |
| parent | 1883ff34b540daacae948f493b0ba525edf5f642 (diff) | |
Change the method to calculate dirty-pages-rate
In function cpu_physical_memory_sync_dirty_bitmap, file
include/exec/ram_addr.h:
if (src[idx][offset]) {
unsigned long bits = atomic_xchg(&src[idx][offset], 0);
unsigned long new_dirty;
new_dirty = ~dest[k];
dest[k] |= bits;
new_dirty &= bits;
num_dirty += ctpopl(new_dirty);
}
After these codes executed, only the pages not dirtied in bitmap(dest),
but dirtied in dirty_memory[DIRTY_MEMORY_MIGRATION] will be calculated.
For example:
When ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION] = 0b00001111,
and atomic_rcu_read(&migration_bitmap_rcu)->bmap = 0b00000011,
the new_dirty will be 0b00001100, and this function will return 2 but not
4 which is expected.
the dirty pages in dirty_memory[DIRTY_MEMORY_MIGRATION] are all new,
so these should be calculated also.
Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/ram_addr.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index cd432e73ae..b05dc84ab9 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -355,7 +355,8 @@ static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, static inline uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest, ram_addr_t start, - ram_addr_t length) + ram_addr_t length, + int64_t *real_dirty_pages) { ram_addr_t addr; unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); @@ -379,6 +380,7 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest, if (src[idx][offset]) { unsigned long bits = atomic_xchg(&src[idx][offset], 0); unsigned long new_dirty; + *real_dirty_pages += ctpopl(bits); new_dirty = ~dest[k]; dest[k] |= bits; new_dirty &= bits; @@ -398,6 +400,7 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest, start + addr, TARGET_PAGE_SIZE, DIRTY_MEMORY_MIGRATION)) { + *real_dirty_pages += 1; long k = (start + addr) >> TARGET_PAGE_BITS; if (!test_and_set_bit(k, dest)) { num_dirty++; |