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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 53F5DC432C0 for ; Sun, 1 Dec 2019 16:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E5E420718 for ; Sun, 1 Dec 2019 16:06:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bhgNkFES" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727165AbfLAQGB (ORCPT ); Sun, 1 Dec 2019 11:06:01 -0500 Received: from mail-io1-f67.google.com ([209.85.166.67]:32949 "EHLO mail-io1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726393AbfLAQGA (ORCPT ); Sun, 1 Dec 2019 11:06:00 -0500 Received: by mail-io1-f67.google.com with SMTP id j13so37547203ioe.0 for ; Sun, 01 Dec 2019 08:06:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=j6OtAq0I54jNaHod0R8HQTI4LJW0XcH5J+R1X6sKSRA=; b=bhgNkFESUQRMWsw8xUZV8D7RlcH+oEMjadwrENPwyI6GvslN3aAidWv6rSu4JRALOY 24q/K85KlL5C9cipvvBbzEdztXZ5occ+5qFqDMW9UY2/oZ5yvX3pT1EFK5ZU6bRubkzI lvVfhDvAfIHe7qM7B4WeCfu8vIFCrbnuHjU9T/QAdporhZYGDk5EDX9OzFHDw6APKF/g qqxiJ7kQn1a46SdBFtNRIAR5s8l75MWjEnu5NCISD3rxBA+xjAwJrZjsACUf7cDzo5/p Kp+hiVXlX94mBpRmJiuPmHQMQ2nAKs+HJWbJgFH7AiiJgwAUoBcYh387QiWb2Y/FtuIm 8/Ig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=j6OtAq0I54jNaHod0R8HQTI4LJW0XcH5J+R1X6sKSRA=; b=tWrITmj2i+xS7FcAm6Fa1CM3VwLt0D+STwxJrMtlBMx1inI3Ru9o2y/IMbej8B+7Zb c0nxHlRWvprRXCQ1JFSWznVAxlAcudnayHNSJCFhaRMs1fUZHYYhNhnCmyKfFzwLOtNI /uXAzCwXlNGuPuxYlqlUfvvKRuTCxHbT/0XAIGrX+RwMf7hsN86pVnDcdOs0b5HoNa/+ tWjul2T8U17YFhcnHVZLOk/HDddvf5NiVtYoXMSbD39PFLEJiDVg5lIPi6jtOmLXcpGJ jo6NBJNdkg8OIO8aCafFViiRqxS1idAXqMNeiCPPtvmasJ+pCOE8ZvgRBFr1r1MaOfed nstw== X-Gm-Message-State: APjAAAV+JK1VW/yrxO1/eFmkcvYC4hMee6gFOsG9hs7YQdY9Vr6oUlnL dEQ4IzGytxlG9OldJDGhyuH1u+JR X-Google-Smtp-Source: APXvYqyEY88oF6MGfnbE5z9++EAy2lPkryro0Y95uQe6MZhreck8GtwKf1AMUF0eZzoIRsV8Hx7bCQ== X-Received: by 2002:a5d:8184:: with SMTP id u4mr49265110ion.155.1575216359885; Sun, 01 Dec 2019 08:05:59 -0800 (PST) Received: from dahern-DO-MB.local ([2601:282:800:fd80:fd6b:fde:b20f:61ed]) by smtp.googlemail.com with ESMTPSA id d8sm7239168ioq.84.2019.12.01.08.05.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 01 Dec 2019 08:05:58 -0800 (PST) Subject: Re: Linux kernel - 5.4.0+ (net-next from 27.11.2019) routing/network performance To: =?UTF-8?Q?Pawe=c5=82_Staszewski?= , netdev@vger.kernel.org References: <81ad4acf-c9b4-b2e8-d6b1-7e1245bce8a5@itcare.pl> From: David Ahern Message-ID: <589d2715-80ae-0478-7e31-342060519320@gmail.com> Date: Sun, 1 Dec 2019 09:05:57 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <81ad4acf-c9b4-b2e8-d6b1-7e1245bce8a5@itcare.pl> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 11/29/19 4:00 PM, Paweł Staszewski wrote: > As always - each year i need to summarize network performance for > routing applications like linux router on native Linux kernel (without > xdp/dpdk/vpp etc) :) > Do you keep past profiles? How does this profile (and traffic rates) compare to older kernels - e.g., 5.0 or 4.19? > HW setup: > > Server (Supermicro SYS-1019P-WTR) > > 1x Intel 6146 > > 2x Mellanox connect-x 5 (100G) (installed in two different x16 pcie > gen3.1 slots) > > 6x 8GB DDR4 2666 (it really matters cause 100G is about 12.5GB/s of > memory bandwidth one direction) > > > And here it is: > > perf top at 72Gbit.s RX and 72Gbit/s TX (at same time) > >    PerfTop:   91202 irqs/sec  kernel:99.7%  exact: 100.0% [4000Hz > cycles:ppp],  (all, 24 CPUs) > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > >      7.56%  [kernel]       [k] __dev_queue_xmit >      5.27%  [kernel]       [k] build_skb >      4.41%  [kernel]       [k] rr_transmit >      4.17%  [kernel]       [k] fib_table_lookup >      3.83%  [kernel]       [k] mlx5e_skb_from_cqe_mpwrq_linear >      3.30%  [kernel]       [k] mlx5e_sq_xmit >      3.14%  [kernel]       [k] __netif_receive_skb_core >      2.48%  [kernel]       [k] netif_skb_features >      2.36%  [kernel]       [k] _raw_spin_trylock >      2.27%  [kernel]       [k] dev_hard_start_xmit