On 2/11/21 8:31 PM, Kevin Traynor wrote:
> Update the docs to remove the previously hardcoded values
> and mention the load and improvement thresholds when
> describing the operation of auto load balance.
>
> Fixes: 62ab5594c20c ("dpif-netdev: Add parameters to configure PMD auto load
> balance.")
> Signed-off-by: Kevin Traynor <[email protected]>
I didn't test the documentation build, but the text looks
good to me:
Acked-by: Ilya Maximets <[email protected]>
> ---
> Documentation/topics/dpdk/pmd.rst | 21 ++++++++++++++++++---
> 1 file changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/topics/dpdk/pmd.rst
> b/Documentation/topics/dpdk/pmd.rst
> index 6f1fdcbc6..caa7d97be 100644
> --- a/Documentation/topics/dpdk/pmd.rst
> +++ b/Documentation/topics/dpdk/pmd.rst
> @@ -211,6 +211,13 @@ If any of above is not met PMD Auto Load Balancing is
> disabled.
> Once auto load balancing is set, each non-isolated PMD measures the
> processing
> load for each of its associated queues every 10 seconds. If the aggregated
> PMD
> -load reaches 95% for 6 consecutive intervals then PMD considers itself to be
> -overloaded.
> +load reaches the load threshold for 6 consecutive intervals then PMD
> considers
> +itself to be overloaded.
> +
> +For example, to set the load threshold to 70%::
> +
> + $ ovs-vsctl set open_vswitch .\
> + other_config:pmd-auto-lb-load-threshold="70"
> +
> +If not set, the default load threshold is 95%.
>
> If any PMD is overloaded, a dry-run of the PMD assignment algorithm is
> @@ -219,5 +226,13 @@ to PMD assignments.
>
> If the resultant mapping of dry-run indicates an improved distribution of the
> -load then the actual reassignment will be performed.
> +load by at least the variance improvement threshold then the actual
> +reassignment will be performed.
> +
> +For example, to set the variance improvement threshold to 40%::
> +
> + $ ovs-vsctl set open_vswitch .\
> + other_config:pmd-auto-lb-improvement-threshold="40"
> +
> +If not set, the default variance improvement threshold is 25%.
>
> .. note::
>
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