Re: [dpdk-dev] [PATCH] vdpa/mlx5: improve interrupt management

[Maxime Coquelin <maxime.coquelin@redhat.com>]

On 3/18/21 10:13 AM, Matan Azrad wrote:
> The driver should notify the guest for each traffic burst detected by CQ
> polling.
> 
> The CQ polling trigger is defined by `event_mode` device argument,
> either by busy polling on all the CQs or by blocked call to HW
> completion event using DevX channel.
> 
> Also, the polling event modes can move to blocked call when the
> traffic rate is low.
> 
> The current blocked call uses the EAL interrupt API suffering a lot
> of overhead in the API management and serve all the drivers and
> libraries using only single thread.
> 
> Use blocking FD of the DevX channel in order to do blocked call
> directly by the DevX channel FD mechanism.
> 
> Signed-off-by: Matan Azrad <matan@nvidia.com>
> Acked-by: Xueming Li <xuemingl@nvidia.com>
> ---
>  doc/guides/vdpadevs/mlx5.rst        |   8 +-
>  drivers/vdpa/mlx5/mlx5_vdpa.c       |   8 +-
>  drivers/vdpa/mlx5/mlx5_vdpa.h       |   8 +-
>  drivers/vdpa/mlx5/mlx5_vdpa_event.c | 308 +++++++++++++++---------------------
>  4 files changed, 134 insertions(+), 198 deletions(-)
> 


Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime