From patchwork Sat May 14 10:27:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guangguan Wang X-Patchwork-Id: 12849742 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2881C433EF for ; Sat, 14 May 2022 10:28:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232089AbiENK17 (ORCPT ); Sat, 14 May 2022 06:27:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231826AbiENK16 (ORCPT ); Sat, 14 May 2022 06:27:58 -0400 Received: from out30-45.freemail.mail.aliyun.com (out30-45.freemail.mail.aliyun.com [115.124.30.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0117A39144; Sat, 14 May 2022 03:27:55 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=guangguan.wang@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0VD6nQiA_1652524072; Received: from localhost.localdomain(mailfrom:guangguan.wang@linux.alibaba.com fp:SMTPD_---0VD6nQiA_1652524072) by smtp.aliyun-inc.com(127.0.0.1); Sat, 14 May 2022 18:27:53 +0800 From: Guangguan Wang To: kgraul@linux.ibm.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, leon@kernel.org Cc: linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 0/2] net/smc: send and write inline optimization for smc Date: Sat, 14 May 2022 18:27:37 +0800 Message-Id: <20220514102739.41252-1-guangguan.wang@linux.alibaba.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Send cdc msgs and write data inline if qp has sufficent inline space, helps latency reducing. In my test environment, which are 2 VMs running on the same physical host and whose NICs(ConnectX-4Lx) are working on SR-IOV mode, qperf shows 0.4us-1.3us improvement in latency. Test command: server: smc_run taskset -c 1 qperf client: smc_run taskset -c 1 qperf -oo \ msg_size:1:2K:*2 -t 30 -vu tcp_lat The results shown below: msgsize before after 1B 11.9 us 10.6 us (-1.3 us) 2B 11.7 us 10.7 us (-1.0 us) 4B 11.7 us 10.7 us (-1.0 us) 8B 11.6 us 10.6 us (-1.0 us) 16B 11.7 us 10.7 us (-1.0 us) 32B 11.7 us 10.6 us (-1.1 us) 64B 11.7 us 11.2 us (-0.5 us) 128B 11.6 us 11.2 us (-0.4 us) 256B 11.8 us 11.2 us (-0.6 us) 512B 11.8 us 11.3 us (-0.5 us) 1KB 11.9 us 11.5 us (-0.4 us) 2KB 12.1 us 11.5 us (-0.6 us) Guangguan Wang (2): net/smc: send cdc msg inline if qp has sufficient inline space net/smc: rdma write inline if qp has sufficient inline space net/smc/smc_ib.c | 1 + net/smc/smc_tx.c | 17 ++++++++++++----- net/smc/smc_wr.c | 5 ++++- 3 files changed, 17 insertions(+), 6 deletions(-)