From patchwork Fri Sep 14 08:45:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Yanjun X-Patchwork-Id: 969685 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=oracle.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=oracle.com header.i=@oracle.com header.b="pjCwK6lo"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 42BTWV0ytLz9s3l for ; Fri, 14 Sep 2018 18:41:10 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727839AbeINNye (ORCPT ); Fri, 14 Sep 2018 09:54:34 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:40760 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726671AbeINNye (ORCPT ); Fri, 14 Sep 2018 09:54:34 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w8E8cqsp157882; Fri, 14 Sep 2018 08:41:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id; s=corp-2018-07-02; bh=Dv2Aaa7KQ836naiIzodmQ3vA5vDHiOugU5sO2hqgJ6M=; b=pjCwK6loS8JIzvlLoPl5LpFc7LwPNSHehG9bHbcuGBRDcq5wbpAo2FK9qAiZlAagDCqY MqTXnp2olpc3mIEbDokvVJRvso/NIzw1uThraHZ62mUfQ9o9F/Ryi/ldsWY/+ThnHyLt VHKaYPSuR1nzAzok4l4vdK4rqNtB+xplYm3fzVQarXRHHpn+jCCMc1s0mQyhJCIR95v7 0ar13l7fTyTSla6pH+XB+2LV73SwkjgPu5a3l6ulODUPJYZ3PH42MOvlX12SMqb5llJW wM8guzdDwA5L1LC0zgmaE2Hzrp80YKcwvEl/6V9wA7krnTQ1Wi6DZoBP/9vomXl+8r5v Lw== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2mc5utwqv5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 14 Sep 2018 08:41:05 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w8E8f3j7027560 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 14 Sep 2018 08:41:04 GMT Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w8E8f37j003115; Fri, 14 Sep 2018 08:41:03 GMT Received: from office-bj2017.cn.oracle.com (/10.182.69.78) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 14 Sep 2018 08:41:03 +0000 From: Zhu Yanjun To: santosh.shilimkar@oracle.com, davem@davemloft.net, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com Subject: [PATCH 1/1] net: rds: use memset to optimize the recv Date: Fri, 14 Sep 2018 04:45:38 -0400 Message-Id: <20180914084538.11666-1-yanjun.zhu@oracle.com> X-Mailer: git-send-email 2.17.1 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9015 signatures=668708 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=689 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809140093 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The function rds_inc_init is in recv process. To use memset can optimize the function rds_inc_init. The test result: Before: 1) + 24.950 us | rds_inc_init [rds](); After: 1) + 10.990 us | rds_inc_init [rds](); Signed-off-by: Zhu Yanjun Acked-by: Santosh Shilimkar --- net/rds/recv.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/net/rds/recv.c b/net/rds/recv.c index 504cd6bcc54c..a9399ddbb7bf 100644 --- a/net/rds/recv.c +++ b/net/rds/recv.c @@ -43,8 +43,6 @@ void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, struct in6_addr *saddr) { - int i; - refcount_set(&inc->i_refcount, 1); INIT_LIST_HEAD(&inc->i_item); inc->i_conn = conn; @@ -53,8 +51,7 @@ void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, inc->i_rx_tstamp.tv_sec = 0; inc->i_rx_tstamp.tv_usec = 0; - for (i = 0; i < RDS_RX_MAX_TRACES; i++) - inc->i_rx_lat_trace[i] = 0; + memset(inc->i_rx_lat_trace, 0, sizeof(inc->i_rx_lat_trace)); } EXPORT_SYMBOL_GPL(rds_inc_init);