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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 B97D7C43381 for ; Tue, 26 Mar 2019 02:22:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 88EE72083D for ; Tue, 26 Mar 2019 02:22:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Zu/lUZJg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731055AbfCZCWi (ORCPT ); Mon, 25 Mar 2019 22:22:38 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:43021 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730533AbfCZCWh (ORCPT ); Mon, 25 Mar 2019 22:22:37 -0400 Received: by mail-pl1-f194.google.com with SMTP id m10so868887plt.10 for ; Mon, 25 Mar 2019 19:22:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=LDMtl+hJ1PVWFFdaUaXU9fblMGYSnnTYxcTfk/Stn8k=; b=Zu/lUZJg4mbwhZVFXYKXO4s54vIK+LTyKpVP70ZSoknHpm8MnkkBAqev9twJw9/0xp kOyCA+UUKWxWBl9Fy96JZLJgr5wrh17BR4Gu+G+bZ3dCOLKjoemPoWQuJBPf/rS1bWou hsd4Eke1t48G3pf4ubOVdsAYC6MgR1OXurk73SnGTk/XT7aC8THupJvf2V77ojaTar1w cuZqeVdr1O4C4D5qUvuDGB3kt5XJ5NMpB082ib5s13sSFi5lyXoJavEwG1pqs7GGZf5z nUt6VvFeJpdoC0NpDOoOrHpqeiZNuwZ0d/nGkZVbMSRngpu7f08ofVge/apMDHmvRajC 7QJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=LDMtl+hJ1PVWFFdaUaXU9fblMGYSnnTYxcTfk/Stn8k=; b=YM9r+D+ehQTX+0fl3E3ACsVMIlZdU7+8T0CkmLtr4H6HxOYU8MqAUDR4x1KM3aGtKS X+dH/a928O2gHRAm+aDRQDyzbFN9TZep8wk0y0ChZMFbn7dYEybbcCnpxWVLuTkI99Wk yU3zOTs80WBoYOL51J+4l355uEyadnvVIHTOxcbEUIRAea5XEtDJEZTw4YobYW/reF+S aEYurmUDWbau8XY2mIrSM9DWYzBQ8jZz5KS5SGTq1Q2CHW6/8IAo2bMc/ALA/cEBCggu dm/4FPJ5XqiocfwKU1SjOKFcFcw9JORdBRI2W2LDN0n+ACSZDVaSqQ6NhBp6h6v5Z3ie pDcw== X-Gm-Message-State: APjAAAX8QWNfffsYFWMoy+iEf2jIYUeuR7GYbGFk7aKfMYkYkeBUTEZN wbHtVj+pP+c1iPKRjFz5AxA= X-Google-Smtp-Source: APXvYqw5VRoRJSvSSapB3O+rlp2JjscKckiPUXdgF/+TSCO+2ZYKmBAnjO+Bqjx1MZ1exWaoW8DGrg== X-Received: by 2002:a17:902:6b8c:: with SMTP id p12mr29225925plk.282.1553566956569; Mon, 25 Mar 2019 19:22:36 -0700 (PDT) Received: from ?IPv6:2601:282:800:fd80:9570:70fa:138c:c89? ([2601:282:800:fd80:9570:70fa:138c:c89]) by smtp.googlemail.com with ESMTPSA id w123sm25527692pfw.72.2019.03.25.19.22.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 Mar 2019 19:22:35 -0700 (PDT) Subject: Re: [PATCH net-next] ipv6: Move ipv6 stubs to a separate header file To: Alexei Starovoitov Cc: David Miller , netdev@vger.kernel.org, edumazet@google.com References: <20190322130609.11655-1-dsahern@kernel.org> <20190323.214023.610983922857554034.davem@davemloft.net> <20190324035550.b4qjyl5ccfvc3tzi@ast-mbp> <20190325032641.5xyav65phoeadgye@ast-mbp> From: David Ahern Message-ID: <6fd90fe8-51bf-60a9-b75e-8028ecb72380@gmail.com> Date: Mon, 25 Mar 2019 20:22:33 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190325032641.5xyav65phoeadgye@ast-mbp> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 3/24/19 9:26 PM, Alexei Starovoitov wrote: > The kernel has to be fast as a dataplane but these extra features > will slow down the routing by making kernel-as-database scale a bit better. I took Vincent Bernat's fib lookup microbenchmark and added input and output route lookups to it. Through this commit: commit 4d5edf447c88e59f5c5716180c1001cde9bf4473 Author: David Ahern Date: Mon Mar 11 18:34:48 2019 -0700 ipv4: Allow ipv6 gateway with ipv4 routes There is no real measurable difference for IPv4 fib lookups (fib_lookup), input routes (ip_route_input_rcu) and output routes (ip_route_output_key_hash_rcu). This is using a bare metal server with a L5640 Xeon CPU. The above commit is the target for the first 2 rounds of patches. I will of course be checking performance each step along the way to nexthop objects.