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migration: add postcopy total blocktime into query-migrate

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Postcopy total blocktime is available on destination side only.
But query-migrate was possible only for source. This patch
adds ability to call query-migrate on destination.
To be able to see postcopy blocktime, need to request postcopy-blocktime
capability.

The query-migrate command will show following sample result:
{"return":
    "postcopy-vcpu-blocktime": [115, 100],
    "status": "completed",
    "postcopy-blocktime": 100
}}

postcopy_vcpu_blocktime contains list, where the first item is the first
vCPU in QEMU.

This patch has a drawback, it combines states of incoming and
outgoing migration. Ongoing migration state will overwrite incoming
state. Looks like better to separate query-migrate for incoming and
outgoing migration or add parameter to indicate type of migration.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <1521742647-25550-7-git-send-email-a.perevalov@samsung.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Alexey Perevalov 2018-03-22 21:17:27 +03:00 • committed by Dr. David Alan Gilbert
parent 346f3dab04
commit 65ace06045
6 changed files with 124 additions and 5 deletions
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11
qapi/migration.json
View file

@ -155,6 +155,13 @@
# @error-desc: the human readable error description string, when
# @status is 'failed'. Clients should not attempt to parse the
# error strings. (Since 2.7)
#
# @postcopy-blocktime: total time when all vCPU were blocked during postcopy
# live migration (Since 2.13)
#
# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU (Since 2.13)
#
#
# Since: 0.14.0
##
@ -167,7 +174,9 @@
'*downtime': 'int',
'*setup-time': 'int',
'*cpu-throttle-percentage': 'int',
'*error-desc': 'str'} }
'*error-desc': 'str',
'*postcopy-blocktime' : 'uint32',
'*postcopy-vcpu-blocktime': ['uint32']} }
##
# @query-migrate: