Re: [dpdk-dev] [PATCH v2] examples/ip_reassembly: use pktmbuf to create pool

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

> -----Original Message-----
> From: Hemant Agrawal [mailto:hemant.agrawal@nxp.com]
> Sent: Thursday, October 12, 2017 2:25 PM
> To: dev@dpdk.org; Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Subject: [PATCH v2] examples/ip_reassembly: use pktmbuf to create pool
> 
> From: Ashish Jain <ashish.jain@nxp.com>
> 
> Use of rte_mempool_create() with the helper provided in
> librte_mbuf: rte_pktmbuf_pool_create().
> This is the preferred way to create a mbuf pool else
> it may not work on implementation using the HW buffer pool
> 
> Signed-off-by: Ashish Jain <ashish.jain@nxp.com>
> ---
> v2: add mempool caches - as suggested by Konstantin
> 
>  examples/ip_reassembly/main.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/examples/ip_reassembly/main.c b/examples/ip_reassembly/main.c
> index cadf4c5..2f662ba 100644
> --- a/examples/ip_reassembly/main.c
> +++ b/examples/ip_reassembly/main.c
> @@ -84,10 +84,10 @@
>  #define MAX_JUMBO_PKT_LEN  9600
> 
>  #define	BUF_SIZE	RTE_MBUF_DEFAULT_DATAROOM
> -#define MBUF_SIZE	\
> -	(BUF_SIZE + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
> +#define	MBUF_DATA_SIZE	RTE_MBUF_DEFAULT_BUF_SIZE
> 
>  #define NB_MBUF 8192
> +#define MEMPOOL_CACHE_SIZE 256
> 
>  /* allow max jumbo frame 9.5 KB */
>  #define JUMBO_FRAME_MAX_SIZE	0x2600
> @@ -909,11 +909,11 @@ setup_queue_tbl(struct rx_queue *rxq, uint32_t lcore, uint32_t queue)
> 
>  	snprintf(buf, sizeof(buf), "mbuf_pool_%u_%u", lcore, queue);
> 
> -	if ((rxq->pool = rte_mempool_create(buf, nb_mbuf, MBUF_SIZE, 0,
> -			sizeof(struct rte_pktmbuf_pool_private),
> -			rte_pktmbuf_pool_init, NULL, rte_pktmbuf_init, NULL,
> -			socket, MEMPOOL_F_SP_PUT | MEMPOOL_F_SC_GET)) == NULL) {
> -		RTE_LOG(ERR, IP_RSMBL, "mempool_create(%s) failed", buf);
> +	rxq->pool = rte_pktmbuf_pool_create(buf, nb_mbuf, MEMPOOL_CACHE_SIZE, 0,
> +					    MBUF_DATA_SIZE, socket);
> +	if (rxq->pool == NULL) {
> +		RTE_LOG(ERR, IP_RSMBL,
> +			"rte_pktmbuf_pool_create(%s) failed", buf);
>  		return -1;
>  	}
> 
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.7.4