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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BD87C433F5 for ; Tue, 11 Jan 2022 01:24:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346213AbiAKBYr (ORCPT ); Mon, 10 Jan 2022 20:24:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243319AbiAKBYq (ORCPT ); Mon, 10 Jan 2022 20:24:46 -0500 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C834C06173F; Mon, 10 Jan 2022 17:24:45 -0800 (PST) Received: by mail-wm1-x333.google.com with SMTP id e5so9972635wmq.1; Mon, 10 Jan 2022 17:24:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ANct+OguCBO1Gd754vKRRXoiagvg224CngFA+Tt5aZ8=; b=d+RSDxzE4pZrAVrueFy/DDFZbzCAhR43h2TWL2KYcv97RG2fUgvx0+GRrbcctDJnkC dE2bF1j+mC96kqyy2kX6mYOD2/025jKe61U7KHPA6t+WFxBn+8OYxiaSTyCG8mB/PXGy 8H0T0VLzsog1cdbNHcotiuQVOVmMIZN+nAUxoIBtguoqm97yPseCZ9cc8XnjOMHq3X6s 3gXYxYHMQHsxgUuWPKBXNATttQ7alAwy8WVuw0NYRhndpr8133+S1mquM/Uxg3Cc1iQL 7XaS12rwNeLM1BN/HOOhLBVWBJd9tZy2loOZYFkkRaWXkjUWAT+J/0nP53q6gVfvF5u6 KqZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ANct+OguCBO1Gd754vKRRXoiagvg224CngFA+Tt5aZ8=; b=itZiT76NGmQ03y7LCqeUpg0wZ5E6lKfJGKHNYGGzNKz6fpdR+wiDmJMNJIU5d83Zk6 ofZqQC0TrOhhNiHjeKIBMv97VDzXX4gOkbFSa6f7Wrc+TEu7M/0pFLASkuInDO73WBl3 gKzgI4vnlWsIAkCBWbUdorXdEz8e/gvCHFLJShCAVmNJx5Oen34OsaAau6aG3ZKvrkrb Z/KGOsoeTJJlMrDAEBGuifze6NrYxY10B5MD4+FvSL7eChl4q66thrcYTRfrdmSLIAvM zmZvDtPkabWv3CqBI/u00vGldBcmkgzMAC9kb1CQwul4qgi8wEfQyMdmZr5EP4YiJ+dn k9RA== X-Gm-Message-State: AOAM5330FlYsJPibIlgc5G3A9D7XI4JIGiJiN9JD+HwJc+VHbUlPNby2 5l/k2QO2ZuHV6RMmboezhcFsMpIXc9g= X-Google-Smtp-Source: ABdhPJx7E+i0EBz37yl8aOmzJpWPSm6RxVW3JsPhDVnDdRZy9EdTUTHDKZNxLUst+Ge3rscQrXktSQ== X-Received: by 2002:a05:600c:4e11:: with SMTP id b17mr337857wmq.66.1641864283998; Mon, 10 Jan 2022 17:24:43 -0800 (PST) Received: from 127.0.0.1localhost ([148.252.129.73]) by smtp.gmail.com with ESMTPSA id i8sm709886wru.26.2022.01.10.17.24.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jan 2022 17:24:43 -0800 (PST) From: Pavel Begunkov To: netdev@vger.kernel.org, "David S . Miller" , Jakub Kicinski Cc: Hideaki YOSHIFUJI , David Ahern , Eric Dumazet , Willem de Bruijn , linux-kernel@vger.kernel.org, Pavel Begunkov Subject: [PATCH 00/14] udp optimisation Date: Tue, 11 Jan 2022 01:21:32 +0000 Message-Id: X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A mainly UDP/IPv6 optimisation patch set. Zerocopy io_uring benchmark over dummy netdev (CPU bound) gives 2068992 -> 2166481 tx/s, which is ~4.7% or over 5% of net layer overhead. Should give similar results for small packet non-zerocopy. - 1/14 and 9/14 remove a get/put dst pair each, so saving 4 atomics per corkless UDP send. - Patches 3-8 optimise iflow handling, in particular removes one 88B memset and one 88B copy. - 10-14 are random improvements, which are not UDP-specific but also beneficial to TCP and others. Pavel Begunkov (14): ipv6: optimise dst referencing ipv6: shuffle up->pending AF_INET bits ipv6: remove daddr temp buffer in __ip6_make_skb ipv6: clean up cork setup/release ipv6: don't zero cork's flowi after use ipv6: pass full cork into __ip6_append_data() ipv6: pass flow in ip6_make_skb together with cork ipv6/udp: don't make extra copies of iflow ipv6: hand dst refs to cork setup skbuff: drop zero check from skb_zcopy_set skbuff: drop null check from skb_zcopy skbuff: optimise alloc_skb_with_frags() net: inline part of skb_csum_hwoffload_help net: inline sock_alloc_send_skb include/linux/netdevice.h | 16 +++++- include/linux/skbuff.h | 45 +++++++++++++--- include/net/ipv6.h | 2 +- include/net/sock.h | 10 +++- net/core/dev.c | 15 ++---- net/core/skbuff.c | 34 +++++------- net/core/sock.c | 7 --- net/ipv4/ip_output.c | 10 ++-- net/ipv4/tcp.c | 5 +- net/ipv6/ip6_output.c | 105 +++++++++++++++++++++----------------- net/ipv6/udp.c | 103 ++++++++++++++++++------------------- 11 files changed, 197 insertions(+), 155 deletions(-) -- 2.34.1