Re: [dpdk-dev] [PATCH v2 4/4] net/ena: enable WC

["Michał Krawczyk" <mk@semihalf.com>]

2018-06-28 15:15 GMT+02:00 Rafal Kozik <rk@semihalf.com>:
>
> Write combining (WC) increases NIC performance by making better
> utilization of PCI bus. ENA PMD may make usage of this feature.
>
> To enable it load igb_uio driver with wc_activate set to 1.
>
> Signed-off-by: Rafal Kozik <rk@semihalf.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>
> ---
>  drivers/net/ena/ena_ethdev.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
> index 9ae73e3..1870edf 100644
> --- a/drivers/net/ena/ena_ethdev.c
> +++ b/drivers/net/ena/ena_ethdev.c
> @@ -2210,7 +2210,8 @@ static int eth_ena_pci_remove(struct rte_pci_device *pci_dev)
>
>  static struct rte_pci_driver rte_ena_pmd = {
>         .id_table = pci_id_ena_map,
> -       .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
> +       .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC |
> +                    RTE_PCI_DRV_WC_ACTIVATE,
>         .probe = eth_ena_pci_probe,
>         .remove = eth_ena_pci_remove,
>  };
> --
> 2.7.4
>