From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH 4/4] lib/librte_vhost: improve vhost perf
	using rte_memset
Date: Fri, 02 Dec 2016 10:46:18 +0100
Message-ID: <1608392.pphkK3YPda@xps13>
References: <1480926387-63838-1-git-send-email-zhiyong.yang@intel.com>
 <1480926387-63838-5-git-send-email-zhiyong.yang@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7Bit
Cc: dev@dpdk.org, yuanhan.liu@linux.intel.com, bruce.richardson@intel.com,
 konstantin.ananyev@intel.com
To: Zhiyong Yang <zhiyong.yang@intel.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mail-wj0-f182.google.com (mail-wj0-f182.google.com
 [209.85.210.182]) by dpdk.org (Postfix) with ESMTP id 27D615585
 for <dev@dpdk.org>; Fri,  2 Dec 2016 10:46:21 +0100 (CET)
Received: by mail-wj0-f182.google.com with SMTP id qp4so227289621wjc.3
 for <dev@dpdk.org>; Fri, 02 Dec 2016 01:46:21 -0800 (PST)
In-Reply-To: <1480926387-63838-5-git-send-email-zhiyong.yang@intel.com>
List-Id: DPDK patches and discussions <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>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

2016-12-05 16:26, Zhiyong Yang:
> +* **Introduced rte_memset and related test on IA platform.**
> +
> +  Performance drop had been caused in some cases on Ivybridge when DPDK code calls glibc
> +  function memset. It was necessary to introduce more high efficient function to fix it.
> +  The function rte_memset supported three types of instruction sets including sse & avx(128 bits),
> +  avx2(256 bits) and avx512(512bits).
> +
> +  * Added rte_memset support on IA platform.
> +  * Added functional autotest support for rte_memset.
> +  * Added performance autotest support for rte_memset.

No need to reference autotests in the release notes.

> +  * Improved performance to use rte_memset instead of copy_virtio_net_hdr in lib/librte_vhost.

Please describe this change at a higher level. Which case it is improving?