From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A4ABECDE5F for ; Fri, 20 Jul 2018 00:15:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28C1B20673 for ; Fri, 20 Jul 2018 00:15:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 28C1B20673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730880AbeGTBBB (ORCPT ); Thu, 19 Jul 2018 21:01:01 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37146 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730288AbeGTBBB (ORCPT ); Thu, 19 Jul 2018 21:01:01 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AC388CE1EA; Fri, 20 Jul 2018 00:15:27 +0000 (UTC) Received: from jason-ThinkPad-T450s.redhat.com (ovpn-12-42.pek2.redhat.com [10.72.12.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id 823DC2026D6B; Fri, 20 Jul 2018 00:15:24 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, netdev@vger.kernel.org Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 0/9] TX used ring batched updating for vhost Date: Fri, 20 Jul 2018 08:15:12 +0800 Message-Id: <1532045721-4958-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 20 Jul 2018 00:15:27 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 20 Jul 2018 00:15:27 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jasowang@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi: This series implement batch updating of used ring for TX. This help to reduce the cache contention on used ring. The idea is first split datacopy path from zerocopy, and do only batching for datacopy. This is because zercopy had already supported its own batching. TX PPS was increased 25.8% and Netperf TCP does not show obvious differences. The split of datapath will also be helpful for future implementation like in order completion. Please review. Thanks Jason Wang (9): vhost_net: drop unnecessary parameter vhost_net: introduce helper to initialize tx iov iter vhost_net: introduce vhost_exceeds_weight() vhost_net: introduce get_tx_bufs() vhost_net: introduce tx_can_batch() vhost_net: split out datacopy logic vhost_net: rename vhost_rx_signal_used() to vhost_net_signal_used() vhost_net: rename VHOST_RX_BATCH to VHOST_NET_BATCH vhost_net: batch update used ring for datacopy TX drivers/vhost/net.c | 249 +++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 179 insertions(+), 70 deletions(-) -- 2.7.4