Re: [dpdk-dev] [PATCH] app/testpmd: add cmdline option to set Rx mq mode

["Iremonger, Bernard" <bernard.iremonger@intel.com>]

Hi Xiaoyu,

> -----Original Message-----
> From: Xiaoyu Min <jackmin@mellanox.com>
> Sent: Wednesday, April 29, 2020 2:04 PM
> To: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Wu, Jingjing
> <jingjing.wu@intel.com>; Iremonger, Bernard
> <bernard.iremonger@intel.com>; Mcnamara, John
> <john.mcnamara@intel.com>; Kovacevic, Marko
> <marko.kovacevic@intel.com>
> Cc: dev@dpdk.org
> Subject: [PATCH] app/testpmd: add cmdline option to set Rx mq mode
> 
> One new cmdline option `--rx-mq-mode` is added in order to have the
> possibility to check whether PMD handle the mq mode correctly or not.
> 
> The reason is some NICs need to do different settings based on different RX
> mq mode, i.e RSS or not.
> 
> With this support in testpmd, the above scenario can be tested easily.
> 
> Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
> ---
>  app/test-pmd/parameters.c             | 12 ++++++++++++
>  app/test-pmd/testpmd.c                | 17 ++++++++++++++---
>  app/test-pmd/testpmd.h                |  3 +++
>  doc/guides/testpmd_app_ug/run_app.rst |  7 +++++++
>  4 files changed, 36 insertions(+), 3 deletions(-)
> 
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c index
> 30c1753c32..a9dd58e96b 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -212,6 +212,7 @@ usage(char* progname)
>  	printf("  --noisy-lkup-num-writes=N: do N random reads and writes
> per packet\n");
>  	printf("  --no-iova-contig: mempool memory can be IOVA non
> contiguous. "
>  	       "valid only with --mp-alloc=anon\n");
> +	printf("  --rx-mq-mode=0xX: hexadecimal bitmask of RX mq
> mode\n");
>  }
> 
>  #ifdef RTE_LIBRTE_CMDLINE
> @@ -670,6 +671,7 @@ launch_args_parse(int argc, char** argv)
>  		{ "noisy-lkup-num-reads",	1, 0, 0 },
>  		{ "noisy-lkup-num-reads-writes", 1, 0, 0 },
>  		{ "no-iova-contig",             0, 0, 0 },
> +		{ "rx-mq-mode",                 1, 0, 0 },
>  		{ 0, 0, 0, 0 },
>  	};
> 
> @@ -1363,6 +1365,16 @@ launch_args_parse(int argc, char** argv)
>  			}
>  			if (!strcmp(lgopts[opt_idx].name, "no-iova-contig"))
>  				mempool_flags =
> MEMPOOL_F_NO_IOVA_CONTIG;
> +
> +			if (!strcmp(lgopts[opt_idx].name, "rx-mq-mode")) {
> +				char *end = NULL;
> +				n = strtoul(optarg, &end, 16);
> +				if (n >= 0)
> +					rx_mq_mode = (enum
> rte_eth_rx_mq_mode)n;
> +				else
> +					rte_exit(EXIT_FAILURE,
> +						 "rx-mq-mode must be >=
> 0\n");
> +			}
>  			break;
>  		case 'h':
>  			usage(argv[0]);
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index
> 99bacddbfd..9536d6ee27 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -482,6 +482,11 @@ uint8_t bitrate_enabled;  struct gro_status
> gro_ports[RTE_MAX_ETHPORTS];  uint8_t gro_flush_cycles =
> GRO_DEFAULT_FLUSH_CYCLES;
> 
> +/*
> + * RX mq mode value set in the commandline  */ enum
> rte_eth_rx_mq_mode
> +rx_mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
> +
>  /* Forward function declarations */
>  static void setup_attached_port(portid_t pi);  static void
> map_port_queue_stats_mapping_registers(portid_t pi, @@ -3337,7 +3342,9
> @@ init_port_config(void)
> 
>  		if (port->dcb_flag == 0) {
>  			if( port->dev_conf.rx_adv_conf.rss_conf.rss_hf != 0)
> -				port->dev_conf.rxmode.mq_mode =
> ETH_MQ_RX_RSS;
> +				port->dev_conf.rxmode.mq_mode =
> +					(enum rte_eth_rx_mq_mode)
> +						(rx_mq_mode &
> ETH_MQ_RX_RSS);
>  			else
>  				port->dev_conf.rxmode.mq_mode =
> ETH_MQ_RX_NONE;
>  		}
> @@ -3438,7 +3445,9 @@ get_eth_dcb_conf(portid_t pid, struct
> rte_eth_conf *eth_conf,
>  		}
> 
>  		/* set DCB mode of RX and TX of multiple queues */
> -		eth_conf->rxmode.mq_mode = ETH_MQ_RX_VMDQ_DCB;
> +		eth_conf->rxmode.mq_mode =
> +				(enum rte_eth_rx_mq_mode)
> +					(rx_mq_mode &
> ETH_MQ_RX_VMDQ_DCB);
>  		eth_conf->txmode.mq_mode = ETH_MQ_TX_VMDQ_DCB;
>  	} else {
>  		struct rte_eth_dcb_rx_conf *rx_conf = @@ -3458,7 +3467,9
> @@ get_eth_dcb_conf(portid_t pid, struct rte_eth_conf *eth_conf,
>  			tx_conf->dcb_tc[i] = i % num_tcs;
>  		}
> 
> -		eth_conf->rxmode.mq_mode = ETH_MQ_RX_DCB_RSS;
> +		eth_conf->rxmode.mq_mode =
> +				(enum rte_eth_rx_mq_mode)
> +					(rx_mq_mode &
> ETH_MQ_RX_DCB_RSS);
>  		eth_conf->rx_adv_conf.rss_conf = rss_conf;
>  		eth_conf->txmode.mq_mode = ETH_MQ_TX_DCB;
>  	}
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index
> 7ff4c5dba3..32bb324c94 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -602,6 +602,9 @@ struct mplsoudp_decap_conf {  };  extern struct
> mplsoudp_decap_conf mplsoudp_decap_conf;
> 
> +/* RX mq mode parameter. */
> +extern enum rte_eth_rx_mq_mode rx_mq_mode;
> +
>  static inline unsigned int
>  lcore_num(void)
>  {
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst
> b/doc/guides/testpmd_app_ug/run_app.rst
> index 727ef52b8f..4f46299e68 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -481,3 +481,10 @@ The command line options are:
> 
>      Enable to create mempool which is not IOVA contiguous. Valid only with --
> mp-alloc=anon.
>      The default value is 0.
> +
> +*   ``--rx-mq-mode``
> +
> +    Set the hexadecimal bitmask of RX queue mq mode.
> +    The default value is 0x7::
> +
> +       ETH_MQ_RX_RSS_FLAG | ETH_MQ_RX_DCB_FLAG |
> ETH_MQ_RX_VMDQ_FLAG
> --
> 2.26.0

Should there be an update to the release notes to announce this new tespmd command line option?

Regards,

Bernard.