migration/xbzrle: add encoding rate
Users may need to check the xbzrle encoding rate to know if the guest
memory is xbzrle encoding-friendly, and dynamically turn off the
encoding if the encoding rate is low.
Signed-off-by: Yi Sun <yi.y.sun@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Message-Id: <1588208375-19556-1-git-send-email-wei.w.wang@intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
diff --git a/qapi/migration.json b/qapi/migration.json
index ee6c5a0..d500055 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -70,6 +70,8 @@
#
# @cache-miss-rate: rate of cache miss (since 2.1)
#
+# @encoding-rate: rate of encoded bytes (since 5.1)
+#
# @overflow: number of overflows
#
# Since: 1.2
@@ -77,7 +79,7 @@
{ 'struct': 'XBZRLECacheStats',
'data': {'cache-size': 'int', 'bytes': 'int', 'pages': 'int',
'cache-miss': 'int', 'cache-miss-rate': 'number',
- 'overflow': 'int' } }
+ 'encoding-rate': 'number', 'overflow': 'int' } }
##
# @CompressionStats:
@@ -337,6 +339,7 @@
# "pages":2444343,
# "cache-miss":2244,
# "cache-miss-rate":0.123,
+# "encoding-rate":80.1,
# "overflow":34434
# }
# }
