[dpdk-dev] [PATCH] net/i40e: fix statistics
Zhang, Qi Z
qi.z.zhang at intel.com
Thu Jan 24 15:19:52 CET 2019
> -----Original Message-----
> From: Sun, Chenmin
> Sent: Wednesday, January 23, 2019 9:30 PM
> To: dev at dpdk.org
> Cc: stable at dpdk.org; Sun, Chenmin <chenmin.sun at intel.com>; Zhang, Qi Z
> <qi.z.zhang at intel.com>
> Subject: [PATCH] net/i40e: fix statistics
>
> From: Chenmin Sun <chenmin.sun at intel.com>
>
> 1. Fix the lldp stop condition check - for firmware versions 6.01(for X710)/3.33(for
> X722) or later we need stop the lldp 2. Doucment known issue for tx bytes
> decreasing due to link status chage
s/Doucment/Document
s/chage/change
Also add
3. deferred stats reset in dev_init to avoid some noise be counted.
>
> Fixes: 044846f071cc ("net/i40e: stop LLDP before setting local LLDP MIB")
> Cc: stable at dpdk.org
> Cc: qi.z.zhang at intel.com
>
> Signed-off-by: Chenmin Sun <chenmin.sun at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
Applied into dpdk-next-net-intel with above commit log change and below minor fix.
Thanks
Qi
> ---
> doc/guides/nics/i40e.rst | 7 +++++++
> drivers/net/i40e/i40e_ethdev.c | 38 +++++++++++++++++++++++++++-------
> 2 files changed, 37 insertions(+), 8 deletions(-)
>
> diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst index
> 6aceb53ea..d9ec07e12 100644
> --- a/doc/guides/nics/i40e.rst
> +++ b/doc/guides/nics/i40e.rst
> @@ -698,3 +698,10 @@ See :numref:`figure_intel_perf_test_setup` for the
> performance test setup.
> * Start creating a stream on packet generator.
>
> * Set the Ethernet II type to 0x0800.
> +
> +Tx bytes affected by the link status change
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +For firmware versions prior to 6.01 for X710 series and 3.33 for X722
> +series, the tx_bytes statsistics data is affected by the link down event. Each
s/statsistics/statistics
> time the link status changes to down, the tx_bytes decreases 110 bytes.
> +
Empty line at end of file
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index a6b97e164..181efbac0 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -1493,9 +1493,6 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void
> *init_params __rte_unused)
> goto err_setup_pf_switch;
> }
>
> - /* reset all stats of the device, including pf and main vsi */
> - i40e_dev_stats_reset(dev);
> -
> vsi = pf->main_vsi;
>
> /* Disable double vlan by default */
> @@ -1590,6 +1587,9 @@ eth_i40e_dev_init(struct rte_eth_dev *dev, void
> *init_params __rte_unused)
> memset(&pf->rss_info, 0,
> sizeof(struct i40e_rte_flow_rss_conf));
>
> + /* reset all stats of the device, including pf and main vsi */
> + i40e_dev_stats_reset(dev);
> +
> return 0;
>
> err_init_fdir_filter_list:
> @@ -3454,12 +3454,38 @@ i40e_fw_version_get(struct rte_eth_dev *dev, char
> *fw_version, size_t fw_size)
> ver, build, patch);
>
> ret += 1; /* add the size of '\0' */
> +
Unnecessary change.
> if (fw_size < (u32)ret)
> return ret;
> else
> return 0;
> }
>
> +/*
> + * When using NVM 6.01(for X710 XL710 XXV710)/3.33(for X722) or later,
> + * the Rx data path does not hang if the FW LLDP is stopped.
> + * return true if lldp need to stop
> + * return false if we cannot disable the LLDP to avoid Rx data path blocking.
> + */
> +static bool
> +i40e_need_stop_lldp(struct rte_eth_dev *dev) {
> + double nvm_ver;
> + char ver_str[64] = {0};
> + struct i40e_hw *hw =
> I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> +
> + i40e_fw_version_get(dev, ver_str, 64);
> + nvm_ver = atof(ver_str);
> + if ((hw->mac.type == I40E_MAC_X722 ||
> + hw->mac.type == I40E_MAC_X722_VF) &&
> + ((uint32_t)(nvm_ver * 1000) >= (uint32_t)(3.33 * 1000)))
> + return true;
> + else if ((uint32_t)(nvm_ver * 1000) >= (uint32_t)(6.01 * 1000))
> + return true;
> +
> + return false;
> +}
> +
> static void
> i40e_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info
> *dev_info) { @@ -11425,11 +11451,7 @@ i40e_dcb_init_configure(struct
> rte_eth_dev *dev, bool sw_dcb)
> * LLDP MIB change event.
> */
> if (sw_dcb == TRUE) {
> - /* When using NVM 6.01 or later, the RX data path does
> - * not hang if the FW LLDP is stopped.
> - */
> - if (((hw->nvm.version >> 12) & 0xf) >= 6 &&
> - ((hw->nvm.version >> 4) & 0xff) >= 1) {
> + if (i40e_need_stop_lldp(dev)) {
> ret = i40e_aq_stop_lldp(hw, TRUE, NULL);
> if (ret != I40E_SUCCESS)
> PMD_INIT_LOG(DEBUG, "Failed to stop lldp");
> --
> 2.17.1
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