[dpdk-dev] [PATCH v8] net/i40e: improved FDIR programming times
Xing, Beilei
beilei.xing at intel.com
Thu May 18 03:38:23 CEST 2017
Hi,
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Michael Lilja
> Sent: Wednesday, May 17, 2017 10:58 PM
> To: Zhang, Helin <helin.zhang at intel.com>; Wu, Jingjing
> <jingjing.wu at intel.com>
> Cc: dev at dpdk.org; Michael Lilja <ml at napatech.com>
> Subject: [dpdk-dev] [PATCH v8] net/i40e: improved FDIR programming times
>
> Previously, the FDIR programming time is +11ms on i40e.
> This patch will result in an average programming time of 22usec with a max of
> 60usec .
>
> Signed-off-by: Michael Lilja <ml at napatech.com>
>
> ---
> v8:
> * Merged two defines into one handling max wait time
>
> v7:
> * Code style changes
>
> v6:
> * Fixed code style issues
>
> v5:
> * Reinitialization of "i" inconsistent with original intent
>
> v4:
> * Code style fix
>
> v3:
> * Replaced commit message
>
> v2:
> * Code style fix
>
> v1:
> * Initial version
> ---
> ---
> drivers/net/i40e/i40e_fdir.c | 26 ++++++++++++--------------
> 1 file changed, 12 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/net/i40e/i40e_fdir.c b/drivers/net/i40e/i40e_fdir.c index
> 28cc554f5..f94e1c3b8 100644
> --- a/drivers/net/i40e/i40e_fdir.c
> +++ b/drivers/net/i40e/i40e_fdir.c
> @@ -73,9 +73,8 @@
> #define I40E_FDIR_IPv6_PAYLOAD_LEN 380
> #define I40E_FDIR_UDP_DEFAULT_LEN 400
>
> -/* Wait count and interval for fdir filter programming */
> -#define I40E_FDIR_WAIT_COUNT 10
> -#define I40E_FDIR_WAIT_INTERVAL_US 1000
> +/* Wait time for fdir filter programming */ #define
> +I40E_FDIR_MAX_WAIT_US 10000
>
> /* Wait count and interval for fdir filter flush */
> #define I40E_FDIR_FLUSH_RETRY 50
> @@ -1295,28 +1294,27 @@ i40e_fdir_filter_programming(struct i40e_pf *pf,
> /* Update the tx tail register */
> rte_wmb();
> I40E_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail);
> -
> - for (i = 0; i < I40E_FDIR_WAIT_COUNT; i++) {
> - rte_delay_us(I40E_FDIR_WAIT_INTERVAL_US);
> + for (i = 0; i < I40E_FDIR_MAX_WAIT_US; i++) {
> if ((txdp->cmd_type_offset_bsz &
>
> rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) ==
>
> rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
> break;
> + rte_delay_us(1);
> }
> - if (i >= I40E_FDIR_WAIT_COUNT) {
> + if (i >= I40E_FDIR_MAX_WAIT_US) {
> PMD_DRV_LOG(ERR, "Failed to program FDIR filter:"
> " time out to get DD on tx queue.");
> return -ETIMEDOUT;
> }
> /* totally delay 10 ms to check programming status*/
> - rte_delay_us((I40E_FDIR_WAIT_COUNT - i) *
> I40E_FDIR_WAIT_INTERVAL_US);
> - if (i40e_check_fdir_programming_status(rxq) < 0) {
> - PMD_DRV_LOG(ERR, "Failed to program FDIR filter:"
> - " programming status reported.");
> - return -ENOSYS;
> + for (; i < I40E_FDIR_MAX_WAIT_US; i++) {
> + if (i40e_check_fdir_programming_status(rxq) >= 0)
> + return 0;
> + rte_delay_us(1);
> }
> -
> - return 0;
> + PMD_DRV_LOG(ERR, "Failed to program FDIR filter:"
> + " programming status reported.");
> + return -ETIMEDOUT;
> }
>
> /*
> --
> 2.12.2
Acked-by: Beilei Xing <beilei.xing at intel.com>
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