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+id = 1200
+title = "always zero when query-dirty-rate"
+state = "opened"
+created_at = "2022-09-08T08:31:08.604Z"
+closed_at = "n/a"
+labels = ["Migration"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1200"
+host-os = "n/a"
+host-arch = "n/a"
+qemu-version = "n/a"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """The creation of VM works well(by virt-install), and I can enter it by 'virsh console or ssh'.
+
+Now, I try to use qemu's feature: calc-dirty-rate.
+
+But, always get '"dirty-rate":0' when 'query-dirty-rate', occasionally '"dirty-rate":2'.
+
+At the same time, I run 'mbw'(mbw -t0 -n 1000000 1024 -q) in vm, a memcpy-intensive benchmark.
+
+
+I'm not sure if some configurations of QEMU/KVM are not enabled.
+
+looking forward to your reply!"""
+reproduce = """```
+1. virsh qemu-monitor-command centos-huazhang '{"execute":"calc-dirty-rate", "arguments": {"calc-time": 1}}'
+
+   {"return":{},"id":"libvirt-16"}
+
+2. virsh qemu-monitor-command centos-huazhang1 '{"execute":"query-dirty-rate"}'
+   
+   {"return":{"status":"measured","sample-pages":512,"dirty-rate":0,"mode":"page-sampling","start-time":607266,"calc-time":1},"id":"libvirt-17"}
+
+```"""
+additional = "n/a"