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Re: [PATCH v10 11/12] migration/dirtyrate: Implement qmp_cal_dirty_rate(
From: |
Zheng Chuan |
Subject: |
Re: [PATCH v10 11/12] migration/dirtyrate: Implement qmp_cal_dirty_rate()/qmp_get_dirty_rate() function |
Date: |
Thu, 24 Sep 2020 16:42:04 +0800 |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 |
On 2020/9/24 3:03, Dr. David Alan Gilbert wrote:
> * Eric Blake (eblake@redhat.com) wrote:
>> On 9/16/20 1:22 AM, Chuan Zheng wrote:
>>> Implement qmp_cal_dirty_rate()/qmp_get_dirty_rate() function which could be
>>> called
>>>
>>> Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
>>> ---
>>
>>> +++ b/qapi/migration.json
>>> @@ -1737,3 +1737,53 @@
>>> ##
>>> { 'enum': 'DirtyRateStatus',
>>> 'data': [ 'unstarted', 'measuring', 'measured'] }
>>> +
>>> +##
>>> +# @DirtyRateInfo:
>>> +#
>>> +# Information about current dirty page rate of vm.
>>> +#
>>> +# @dirty-rate: @dirtyrate describing the dirty page rate of vm
>>> +# in units of MB/s.
>>> +# If this field return '-1', it means querying is not
>>> +# start or not complete.
>>
>> Grammar:
>>
>> it means querying has not yet started or completed.
>>
>> Should this field instead be optional, and omitted for those cases? In
>> which case, I'd suggest:
>>
>> ...in units of MB/s, present only when querying the rate has completed.
>
Hi, Eric.
Thanks for your review.
Yeah, it could be optional.
and should it need keep start-time and calc-time when omit dirtyrate?
like:
{"return":{"status":"measuring","start-time":3718293,"calc-time":1},"id":"libvirt-15"}
or
{"return":{"status":"unstarted","start-time":3718293,"calc-time":1},"id":"libvirt-15"}
> I've already got it queued; I'll fix up the grammar; if someone wants to
> send a change to make it optional before this version freezes that's OK.
>
> Dave
>
>>
>>> +#
>>> +# @status: status containing dirtyrate query status includes
>>> +# 'unstarted' or 'measuring' or 'measured'
>>> +#
>>> +# @start-time: start time in units of second for calculation
>>> +#
>>> +# @calc-time: time in units of second for sample dirty pages
>>> +#
>>> +# Since: 5.2
>>> +#
>>> +##
>>> +{ 'struct': 'DirtyRateInfo',
>>> + 'data': {'dirty-rate': 'int64',
>>> + 'status': 'DirtyRateStatus',
>>> + 'start-time': 'int64',
>>> + 'calc-time': 'int64'} }
>>> +
>>> +##
>>> +# @calc-dirty-rate:
>>> +#
>>> +# start calculating dirty page rate for vm
>>> +#
>>> +# @calc-time: time in units of second for sample dirty pages
>>> +#
>>> +# Since: 5.2
>>> +#
>>> +# Example:
>>> +# {"command": "calc-dirty-rate", "data": {"calc-time": 1} }
>>> +#
>>> +##
>>> +{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64'} }
>>> +
>>> +##
>>> +# @query-dirty-rate:
>>> +#
>>> +# query dirty page rate in units of MB/s for vm
>>> +#
>>> +# Since: 5.2
>>> +##
>>> +{ 'command': 'query-dirty-rate', 'returns': 'DirtyRateInfo' }
>>>
>>
>> --
>> Eric Blake, Principal Software Engineer
>> Red Hat, Inc. +1-919-301-3226
>> Virtualization: qemu.org | libvirt.org
- [PATCH v10 02/12] migration/dirtyrate: add DirtyRateStatus to denote calculation status, (continued)
- [PATCH v10 02/12] migration/dirtyrate: add DirtyRateStatus to denote calculation status, Chuan Zheng, 2020/09/16
- [PATCH v10 12/12] migration/dirtyrate: Add trace_calls to make it easier to debug, Chuan Zheng, 2020/09/16
- [PATCH v10 10/12] migration/dirtyrate: Implement calculate_dirtyrate() function, Chuan Zheng, 2020/09/16
- [PATCH v10 01/12] migration/dirtyrate: setup up query-dirtyrate framwork, Chuan Zheng, 2020/09/16
- [PATCH v10 06/12] migration/dirtyrate: Record hash results for each sampled page, Chuan Zheng, 2020/09/16
- [PATCH v10 09/12] migration/dirtyrate: Implement set_sample_page_period() and is_sample_period_valid(), Chuan Zheng, 2020/09/16
- [PATCH v10 11/12] migration/dirtyrate: Implement qmp_cal_dirty_rate()/qmp_get_dirty_rate() function, Chuan Zheng, 2020/09/16
- [PATCH v10 07/12] migration/dirtyrate: Compare page hash results for recorded sampled page, Chuan Zheng, 2020/09/16
- [PATCH v10 08/12] migration/dirtyrate: skip sampling ramblock with size below MIN_RAMBLOCK_SIZE, Chuan Zheng, 2020/09/16
- Re: [PATCH v10 00/12] *** A Method for evaluating dirty page rate ***, Dr. David Alan Gilbert, 2020/09/17
Re: [PATCH v10 00/12] *** A Method for evaluating dirty page rate ***, Dr. David Alan Gilbert, 2020/09/23