[ovs-dev] [PATCH v3 4/4] netdev-dpdk: Enable vhost-tx-retries config.

Flavio Leitner fbl at sysclose.org
Thu Jun 27 14:18:38 UTC 2019


On Thu, Jun 27, 2019 at 12:12:32PM +0100, Kevin Traynor wrote:
> vhost tx retries can provide some mitigation against
> dropped packets due to a temporarily slow guest/limited queue
> size for an interface, but on the other hand when a system
> is fully loaded those extra cycles retrying could mean
> packets are dropped elsewhere.
> 
> Up to now max vhost tx retries have been hardcoded, which meant
> no tuning and no way to disable for debugging to see if extra
> cycles spent retrying resulted in rx drops on some other
> interface.
> 
> Add an option to change the max retries, with a value of
> 0 effectively disabling vhost tx retries.
> 
> Signed-off-by: Kevin Traynor <ktraynor at redhat.com>
> ---

Acked-by: Flavio Leitner <fbl at sysclose.org>
Thanks Kevin!
fbl



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