On 2/13/20 9:27 PM, Keqian Zhu wrote:
At the tail stage of throttle, VM is very sensitive to
CPU percentage. We just throttle 30% of remaining CPU
when throttle is more than 80 percentage.
This doesn't conflict with cpu_throttle_increment.
This may make migration time longer, and is disabled
by default.
Signed-off-by: Keqian Zhu <zhukeqi...@huawei.com>
---
Cc: Juan Quintela <quint...@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
Cc: Eric Blake <ebl...@redhat.com>
Cc: Markus Armbruster <arm...@redhat.com>
+++ b/qapi/migration.json
@@ -532,6 +532,12 @@
# auto-converge detects that migration is not making
# progress. The default value is 10. (Since 2.7)
#
+# @cpu-throttle-tailslow: Make throttle slower at tail stage
+# At the tail stage of throttle, VM is very sensitive
to
+# CPU percentage. We just throttle 30% of remaining CPU
+# when throttle is more than 80 percentage. The default
+# value is false. (Since 4.1)
The next release is 5.0, not 4.1.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
