Re: [dpdk-dev] [PATCH v2 12/12] examples/ipsec-secgw: add cmd line option for bufs

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> 
> From: Lukasz Bartosik <lbartosik@marvell.com>
> 
> Add command line option -s which can be used to configure number
> of buffers in a pool. Default number of buffers is 8192.
> 
> Signed-off-by: Anoob Joseph <anoobj@marvell.com>
> Signed-off-by: Lukasz Bartosik <lbartosik@marvell.com>
> ---
>  examples/ipsec-secgw/ipsec-secgw.c | 23 +++++++++++++++++++----
>  1 file changed, 19 insertions(+), 4 deletions(-)
> 
> diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
> index 7d844bb..a67ea0a 100644
> --- a/examples/ipsec-secgw/ipsec-secgw.c
> +++ b/examples/ipsec-secgw/ipsec-secgw.c
> @@ -59,8 +59,6 @@ volatile bool force_quit;
> 
>  #define MEMPOOL_CACHE_SIZE 256
> 
> -#define NB_MBUF	(32000)
> -
>  #define CDEV_QUEUE_DESC 2048
>  #define CDEV_MAP_ENTRIES 16384
>  #define CDEV_MP_NB_OBJS 1024
> @@ -162,6 +160,7 @@ static int32_t numa_on = 1; /**< NUMA is enabled by default. */
>  static uint32_t nb_lcores;
>  static uint32_t single_sa;
>  static uint32_t schedule_type;
> +static uint32_t nb_bufs_in_pool = 8192;

I still think it is not a good idea to change default number of mbufs.
8K is not that much: 1 core with 4 ports, or 1 port over 4 cores,
and user might start to see unexpected failures.
Now you added an option to allow user define number of mbufs in the app,
which is a good thing, but default one I think should remain the same
(to avoid any unexpected failures).
Konstantin 


> 
>  /*
>   * RX/TX HW offload capabilities to enable/use on ethernet ports.
> @@ -1264,6 +1263,7 @@ print_usage(const char *prgname)
>  		" [-w REPLAY_WINDOW_SIZE]"
>  		" [-e]"
>  		" [-a]"
> +		" [-s NUMBER_OF_MBUFS_IN_PKT_POOL]"
>  		" -f CONFIG_FILE"
>  		" --config (port,queue,lcore)[,(port,queue,lcore)]"
>  		" [--single-sa SAIDX]"
> @@ -1285,6 +1285,7 @@ print_usage(const char *prgname)
>  		"     size for each SA\n"
>  		"  -e enables ESN\n"
>  		"  -a enables SA SQN atomic behaviour\n"
> +		"  -s number of mbufs in packet pool (default 8192)\n"
>  		"  -f CONFIG_FILE: Configuration file\n"
>  		"  --config (port,queue,lcore): Rx queue configuration\n"
>  		"  --single-sa SAIDX: In poll mode use single SA index for\n"
> @@ -1484,7 +1485,7 @@ parse_args(int32_t argc, char **argv, struct eh_conf *eh_conf)
> 
>  	argvopt = argv;
> 
> -	while ((opt = getopt_long(argc, argvopt, "aelp:Pu:f:j:w:",
> +	while ((opt = getopt_long(argc, argvopt, "aelp:Pu:f:j:w:s:",
>  				lgopts, &option_index)) != EOF) {
> 
>  		switch (opt) {
> @@ -1518,6 +1519,19 @@ parse_args(int32_t argc, char **argv, struct eh_conf *eh_conf)
>  			cfgfile = optarg;
>  			f_present = 1;
>  			break;
> +
> +		case 's':
> +			ret = parse_decimal(optarg);
> +			if (ret < 0) {
> +				printf("Invalid number of buffers in a pool: "
> +					"%s\n", optarg);
> +				print_usage(prgname);
> +				return -1;
> +			}
> +
> +			nb_bufs_in_pool = ret;
> +			break;
> +
>  		case 'j':
>  			ret = parse_decimal(optarg);
>  			if (ret < RTE_MBUF_DEFAULT_BUF_SIZE ||
> @@ -2753,11 +2767,12 @@ main(int32_t argc, char **argv)
>  		if (socket_ctx[socket_id].mbuf_pool)
>  			continue;
> 
> -		pool_init(&socket_ctx[socket_id], socket_id, NB_MBUF);
> +		pool_init(&socket_ctx[socket_id], socket_id, nb_bufs_in_pool);
>  		session_pool_init(&socket_ctx[socket_id], socket_id, sess_sz);
>  		session_priv_pool_init(&socket_ctx[socket_id], socket_id,
>  			sess_sz);
>  	}
> +	printf("Number of mbufs in packet pool %d\n", nb_bufs_in_pool);
> 
>  	RTE_ETH_FOREACH_DEV(portid) {
>  		if ((enabled_port_mask & (1 << portid)) == 0)
> --
> 2.7.4