Re: [PULL 04/20] migration/dirtyrate: introduce struct and adjust DirtyRateStat

[Eric Blake <eblake@xxxxxxxxxx>]

On Mon, Nov 01, 2021 at 11:08:56PM +0100, Juan Quintela wrote:
> From: Hyman Huang(黄勇) <huangy81@xxxxxxxxxxxxxxx>
> 
> introduce "DirtyRateMeasureMode" to specify what method should be
> used to calculate dirty rate, introduce "DirtyRateVcpu" to store
> dirty rate for each vcpu.
> 
> use union to store stat data of specific mode
> 
> Signed-off-by: Hyman Huang(黄勇) <huangy81@xxxxxxxxxxxxxxx>
> Message-Id: 
> <661c98c40f40e163aa58334337af8f3ddf41316a.1624040308.git.huangy81@xxxxxxxxxxxxxxx>
> Reviewed-by: Peter Xu <peterx@xxxxxxxxxx>
> Reviewed-by: Juan Quintela <quintela@xxxxxxxxxx>
> Signed-off-by: Juan Quintela <quintela@xxxxxxxxxx>
> ---
>  qapi/migration.json   | 30 +++++++++++++++++++++++++++
>  migration/dirtyrate.h | 21 +++++++++++++++----
>  migration/dirtyrate.c | 48 +++++++++++++++++++++++++------------------
>  3 files changed, 75 insertions(+), 24 deletions(-)
> 
> diff --git a/qapi/migration.json b/qapi/migration.json
> index 9aa8bc5759..94eece16e1 100644
> --- a/qapi/migration.json
> +++ b/qapi/migration.json
> @@ -1731,6 +1731,21 @@
>  { 'event': 'UNPLUG_PRIMARY',
>    'data': { 'device-id': 'str' } }
>  
> +##
> +# @DirtyRateVcpu:
> +#
> +# Dirty rate of vcpu.
> +#
> +# @id: vcpu index.
> +#
> +# @dirty-rate: dirty rate.
> +#
> +# Since: 6.1

I'm a bit late on the review, since this pull request is already in.
We'll want a followup patch that changes this to mention 6.2, to
correctly match the release that will first have it.  Such a followup
is safe during freeze, since it is doc-only.

> +#
> +##
> +{ 'struct': 'DirtyRateVcpu',
> +  'data': { 'id': 'int', 'dirty-rate': 'int64' } }
> +
>  ##
>  # @DirtyRateStatus:
>  #

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org