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Diffstat (limited to 'docs/xbzrle.txt')
| -rw-r--r-- | docs/xbzrle.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/xbzrle.txt b/docs/xbzrle.txt index cc3a26a91d..52c8511a4c 100644 --- a/docs/xbzrle.txt +++ b/docs/xbzrle.txt @@ -71,6 +71,14 @@ encoded buffer: encoded length 24 e9 07 0f 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 03 01 67 01 01 69 +Cache update strategy +===================== +Keeping the hot pages in the cache is effective for decreased cache +misses. XBZRLE uses a counter as the age of each page. The counter will +increase after each ram dirty bitmap sync. When a cache conflict is +detected, XBZRLE will only evict pages in the cache that are older than +a threshold. + Usage ====================== 1. Verify the destination QEMU version is able to decode the new format. |