From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <olivier.matz@6wind.com>
Received: from mail.droids-corp.org (zoll.droids-corp.org [94.23.50.67])
 by dpdk.org (Postfix) with ESMTP id B18223237
 for <dev@dpdk.org>; Tue, 24 May 2016 16:59:56 +0200 (CEST)
Received: from was59-1-82-226-113-214.fbx.proxad.net ([82.226.113.214]
 helo=[192.168.0.10])
 by mail.droids-corp.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
 (Exim 4.84_2) (envelope-from <olivier.matz@6wind.com>)
 id 1b5DqN-0006mL-37; Tue, 24 May 2016 17:02:04 +0200
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>, dev@dpdk.org
References: <1464101442-10501-1-git-send-email-jerin.jacob@caviumnetworks.com>
Cc: thomas.monjalon@6wind.com, bruce.richardson@intel.com,
 konstantin.ananyev@intel.com
From: Olivier Matz <olivier.matz@6wind.com>
Message-ID: <57446C63.4040605@6wind.com>
Date: Tue, 24 May 2016 16:59:47 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
 Icedove/38.6.0
MIME-Version: 1.0
In-Reply-To: <1464101442-10501-1-git-send-email-jerin.jacob@caviumnetworks.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Subject: Re: [dpdk-dev] [PATCH] mbuf: replace c memcpy code semantics with
 optimized rte_memcpy
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Tue, 24 May 2016 14:59:56 -0000

Hi Jerin,


On 05/24/2016 04:50 PM, Jerin Jacob wrote:
> Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> ---
>  lib/librte_mempool/rte_mempool.h | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
> index ed2c110..ebe399a 100644
> --- a/lib/librte_mempool/rte_mempool.h
> +++ b/lib/librte_mempool/rte_mempool.h
> @@ -74,6 +74,7 @@
>  #include <rte_memory.h>
>  #include <rte_branch_prediction.h>
>  #include <rte_ring.h>
> +#include <rte_memcpy.h>
>  
>  #ifdef __cplusplus
>  extern "C" {
> @@ -917,7 +918,6 @@ __mempool_put_bulk(struct rte_mempool *mp, void * const *obj_table,
>  		    unsigned n, __rte_unused int is_mp)
>  {
>  	struct rte_mempool_cache *cache;
> -	uint32_t index;
>  	void **cache_objs;
>  	unsigned lcore_id = rte_lcore_id();
>  	uint32_t cache_size = mp->cache_size;
> @@ -946,8 +946,7 @@ __mempool_put_bulk(struct rte_mempool *mp, void * const *obj_table,
>  	 */
>  
>  	/* Add elements back into the cache */
> -	for (index = 0; index < n; ++index, obj_table++)
> -		cache_objs[index] = *obj_table;
> +	rte_memcpy(&cache_objs[0], obj_table, sizeof(void *) * n);
>  
>  	cache->len += n;
>  
> 

The commit title should be "mempool" instead of "mbuf".
Are you seeing some performance improvement by using rte_memcpy()?

Regards
Olivier