Jaehoon Kim <[email protected]> writes:
> Introduce a new poll-weight parameter for aio-poll. This parameter
> controls how much the most recent event interval affects the next
> polling duration. When set to 0, a default value of 2 is used, meaning
> the current interval contributes roughly 25% to the calculation. Larger
> values decrease the weight of the current interval, enabling more
> gradual adjustments to polling duration.
>
> Signed-off-by: Jaehoon Kim <[email protected]>
[...]
> diff --git a/qapi/misc.json b/qapi/misc.json
> index 28c641fe2f..b21cc48a03 100644
> --- a/qapi/misc.json
> +++ b/qapi/misc.json
> @@ -85,6 +85,11 @@
> # @poll-shrink: how many ns will be removed from polling time, 0 means
> # that it's not configured (since 2.9)
> #
> +# @poll-weight: the weight factor for adaptive polling.
> +# Determines how much the current event interval contributes to
> +# the next polling time calculation. 0 means that the default
> +# value is used. (since 10.1)
When the default value is used, the actual value being used remains
hidden. Why?
> +#
> # @aio-max-batch: maximum number of requests in a batch for the AIO
> # engine, 0 means that the engine will use its default (since 6.1)
> #
> @@ -96,6 +101,7 @@
> 'poll-max-ns': 'int',
> 'poll-grow': 'int',
> 'poll-shrink': 'int',
> + 'poll-weight': 'int',
> 'aio-max-batch': 'int' } }
>
> ##
> diff --git a/qapi/qom.json b/qapi/qom.json
> index 6f5c9de0f0..d90823478d 100644
> --- a/qapi/qom.json
> +++ b/qapi/qom.json
> @@ -606,6 +606,11 @@
> # algorithm detects it is spending too long polling without
> # encountering events. 0 selects a default behaviour (default: 0)
> #
> +# @poll-weight: the weight factor for adaptive polling.
> +# Determines how much the current event interval contributes to
> +# the next polling time calculation. 0 selects a default
> +# behaviour (default: 0) since 10.1.
This leaves the actual default behavior unspecified. Is this a good
idea?
> +#
> # The @aio-max-batch option is available since 6.1.
> #
> # Since: 2.0
> @@ -614,7 +619,8 @@
> 'base': 'EventLoopBaseProperties',
> 'data': { '*poll-max-ns': 'int',
> '*poll-grow': 'int',
> - '*poll-shrink': 'int' } }
> + '*poll-shrink': 'int',
> + '*poll-weight': 'int' } }
>
> ##
> # @MainLoopProperties:
[...]
