From owner-freebsd-net@freebsd.org Wed Mar 28 22:41:47 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 01F5FF50126 for ; Wed, 28 Mar 2018 22:41:47 +0000 (UTC) (envelope-from kmacybsd@gmail.com) Received: from mail-ot0-x230.google.com (mail-ot0-x230.google.com [IPv6:2607:f8b0:4003:c0f::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 93AF386E9F for ; Wed, 28 Mar 2018 22:41:46 +0000 (UTC) (envelope-from kmacybsd@gmail.com) Received: by mail-ot0-x230.google.com with SMTP id v64-v6so4422478otb.13 for ; Wed, 28 Mar 2018 15:41:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=L/kcyPykq/UMnG2xbulDf5ObqbKGAn85Jhr+aV9DESQ=; b=blHrzkhaGh8j0SCE+O/jR1LOPqADbO/bNpumHohRO7ArQOPNfQlpkr5g8bC8b9KtHn q5tXbvUlAUcd2BE5bUutCbOZuEpMEQ2M8hdDq1+2hDrH+hHDkBsNnRx6rFgloY8/5uoV 0IwEYpCT6fTqZcnPprEZdcojsPCq9Eiqa2hcYpjUWYCP00gPSdrlr/ZzvZrfuYJi/PSY ql1kimzfkbqugM6eGbtG9kiHElkae/l6VAalf7vEYq5rHY2opO1efTbftBtHtlnil43c qnqxTb/SE9tiqwrWEQ7vTqkdp3FUoWsMNRGcTAvD9v0Wy23FpKoKq9giok0Vi8C0oNop ouwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=L/kcyPykq/UMnG2xbulDf5ObqbKGAn85Jhr+aV9DESQ=; b=RHhwcgxGB4MhWzmD/HJ5VEsUicwTagGRj2OXE6XCZEl3UpDbKJb6lbAilyaHrGhtPg W1MUwiUpt2cs2LVcLWSJIM0tCu4gbkc6Yuf9thaQZlisAlQzlfQMeHpV52up23m3QWuP 9JuBhK5xxOQNLnLjAN94wZtDR/lAiBWm4LzaegaMjYmefpJPPAWieXmHE2JBNBaPyNkF vzZCtgSQOqpKggIW45egMMO4o67Kn9sqc7QWDUUws5MeVuNNU/8HTF4HpGt7lSmi9hab CPODk0aGk4xEOvdk15fdrxwN55602HXasqJSk90LFv6w+WdqNUAAo/uBeNIOSC637cc/ KrFg== X-Gm-Message-State: AElRT7HnoSCChtCwfcE5lLyDM8JkmKKPVRxFEfeuXk8X/r7pRDF3dMGe TINjS7ee/80+fTX6T/8HRy6FQ3KKk70XOLxlruk= X-Google-Smtp-Source: AIpwx4+cJWVjrOp/3BMNJ1Tm1Yel7rXA6YlStJhaXfqt5S9rbQgZSEaPVxNmgB0ZQsrI5CCFaM2scbh85EvJGkvUj/U= X-Received: by 2002:a9d:252b:: with SMTP id k40-v6mr3583613otb.141.1522276905737; Wed, 28 Mar 2018 15:41:45 -0700 (PDT) MIME-Version: 1.0 Sender: kmacybsd@gmail.com Received: by 2002:a9d:4782:0:0:0:0:0 with HTTP; Wed, 28 Mar 2018 15:41:45 -0700 (PDT) In-Reply-To: References: From: "K. Macy" Date: Wed, 28 Mar 2018 15:41:45 -0700 X-Google-Sender-Auth: Q7kRBpMBGEFc0-ywtLU1CEdH2fQ Message-ID: Subject: Re: Current state of Intel XL710 40G NIC ixl performance To: christian russell Cc: freebsd-net@freebsd.org Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Mar 2018 22:41:47 -0000 > On a single-client basis the fastest rates we see are around 5 Gbps. > Hitting this server from multiple boxes we see peaks of 20 Gbps at the very > highest. More frequently things top off around 13 Gbps. These numbers are > coming from iperf tests. We are seeing similar numbers with direct > point-to-point as well as switched topologies. > > These threads from 2015 describe similar issues but fizzled out: > https://lists.freebsd.org/pipermail/freebsd-net/2015-May/042273.html > https://lists.freebsd.org/pipermail/freebsd-net/2015-October/043584.html > > Is there very particular tuning required to get these cards working at > proper speed? Any insights? This is unfortunate. The iflib version of the ixl driver performed quite well under NFLX load several years ago. I even saw 39Gbps single stream with v6. Fortunately, Intel will eventually be pushing the iflib version to HEAD. -M