Chuan Zheng 31dcda4fc7 migration/dirtyrate: add migration dirtyrate feature
dirtyrate feature provides a method for calcluting dirty
page rate before migration.

Test dirtyrate by qmp command like this:
1. virsh qemu-monitor-command [vmname] '{"execute":"calc-dirty-rate", "arguments": {"calc-time": [sleep-time]}}'
2. sleep specific time which is a bit larger than sleep-time
3. virsh qemu-monitor-command [vmname] '{"execute":"query-dirty-rate"}'
2021-04-17 15:41:25 +08:00
2019-11-06 19:50:55 +08:00
2019-09-30 11:15:46 -04:00
2019-09-30 11:15:46 -04:00
2020-05-12 11:33:00 +08:00
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