From patchwork Thu Oct 12 07:44:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13418454 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9AB2101D5 for ; Thu, 12 Oct 2023 07:44:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-119.freemail.mail.aliyun.com (out30-119.freemail.mail.aliyun.com [115.124.30.119]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D95C090 for ; Thu, 12 Oct 2023 00:44:12 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R321e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045176;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0VtziJda_1697096649; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VtziJda_1697096649) by smtp.aliyun-inc.com; Thu, 12 Oct 2023 15:44:10 +0800 From: Heng Qi To: Jason Wang , "Michael S. Tsirkin" , netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Xuan Zhuo , Eric Dumazet , "David S. Miller" , Paolo Abeni , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Jakub Kicinski , Simon Horman , "Liu, Yujie" Subject: [PATCH net-next 0/5] virtio-net: support dynamic coalescing moderation Date: Thu, 12 Oct 2023 15:44:04 +0800 Message-Id: X-Mailer: git-send-email 2.19.1.6.gb485710b Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Now, virtio-net already supports per-queue moderation parameter setting. Based on this, we use the netdim library of linux to support dynamic coalescing moderation for virtio-net. Due to hardware scheduling issues, we only tested rx dim. @Test env rxq0 has affinity to cpu0. @Test cmd client: taskset -c 0 sockperf tp -i ${IP} -t 30 --tcp -m ${msg_size} server: taskset -c 0 sockperf sr --tcp @Test res The second column is the ratio of the result returned by client when rx dim is enabled to the result returned by client when rx dim is disabled. -------------------------------------- | msg_size | rx_dim=on / rx_dim=off | -------------------------------------- | 14B | + 3% | -------------------------------------- | 100B | + 16% | -------------------------------------- | 500B | + 25% | -------------------------------------- | 1400B | + 28% | -------------------------------------- | 2048B | + 22% | -------------------------------------- | 4096B | + 5% | -------------------------------------- --- This patch set was part of the previous netdim patch set[1]. [1] was split into a merged bugfix set[2] and the current set. The previous relevant commentators have been Cced. [1] https://lore.kernel.org/all/20230811065512.22190-1-hengqi@linux.alibaba.com/ [2] https://lore.kernel.org/all/cover.1696745452.git.hengqi@linux.alibaba.com/ Heng Qi (5): virtio-net: returns whether napi is complete virtio-net: separate rx/tx coalescing moderation cmds virtio-net: extract virtqueue coalescig cmd for reuse virtio-net: support rx netdim virtio-net: support tx netdim drivers/net/virtio_net.c | 394 ++++++++++++++++++++++++++++++++------- 1 file changed, 322 insertions(+), 72 deletions(-)