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=-2.3 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 2D118C4332B for ; Thu, 19 Mar 2020 01:54:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA52F20714 for ; Thu, 19 Mar 2020 01:54:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="WIy+BdDZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726840AbgCSBy1 (ORCPT ); Wed, 18 Mar 2020 21:54:27 -0400 Received: from mail-pf1-f172.google.com ([209.85.210.172]:45440 "EHLO mail-pf1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726777AbgCSBy1 (ORCPT ); Wed, 18 Mar 2020 21:54:27 -0400 Received: by mail-pf1-f172.google.com with SMTP id j10so482992pfi.12 for ; Wed, 18 Mar 2020 18:54:26 -0700 (PDT) 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-transfer-encoding:content-language; bh=EBuP8wFcDWQjE90QiUIty8tjggf7FtDsz4+pTxsW6U4=; b=WIy+BdDZLlk5lzfzrpaLdL1HATHXOuYvEhi/c7W5CwmBo/VUHEG8by0NIfH73vlKo0 TD5dyCpItpCWiw9dC9jE57t8uBtMLElMJ3c18RFNDxxq9PACitMezUjGAPlecFa/qUU+ eBGfh94lL6T9SgwBFA74UjiRUFSaUxl2ZUksIV4sV/7xGxuOShMdOzdwDib0T1F9ZSjX tsWopgoXZNyWU38MqU740YaYmVP0U6U0JwUhomqN7ojFSRG7H8LUt4OVRG8w4r5gbbsp /5A+4Y8fvbK0XEs6oOuAW1Jz3MceLKEe5lrtWXYDhitr8meT8u2zRq3RUX/Xvjr2Jp2Z jx5Q== 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-transfer-encoding :content-language; bh=EBuP8wFcDWQjE90QiUIty8tjggf7FtDsz4+pTxsW6U4=; b=q0kLfGn88aVbyxBORTRL4COYyhMnZ2SYgnk/5HNpS95mDmwRKV6nVDXUDq9py2XAB2 EIKXS3DkgF+CwyPFS2G4EhC9bWJhXuA+xrIapdBPcgxn2SxTuK+5wRwsim/+DVo2ZOLu TO122wvhxoPXfWobGyoZwlY+4r81fmhvUp52lXT+wk48G98ibfAa4gO29Q7QSLM3InrT bBJv1nPVAVzsu9jaQhJlwGIhUluC8/lMzizGdtMElMQlyt3sQzV3tVgDKBF8ZKIK9wdj Iq5CQIzE3WkigdtilDHMYAyNtAvOCa2jU9sfeDkPe213gIDsOwhHoQ6LUVU8qog5JXL0 ZaXQ== X-Gm-Message-State: ANhLgQ1CNS12mg3eUGv+vzpQDbtkxv4n0gkf6kaoQ0MC30J3o+GMFhFD vaIeM24tsxqtzhAJ/MW39FYU9aWc X-Google-Smtp-Source: ADFU+vuPvidviiPgWohLl8gHvGR5tZ6Q2HeiGKIFcjj1ceoizYV0+04+73tntVugZc/V2fnX7evqcw== X-Received: by 2002:a63:4cc:: with SMTP id 195mr732523pge.93.1584582865885; Wed, 18 Mar 2020 18:54:25 -0700 (PDT) Received: from [10.75.201.14] ([118.201.220.138]) by smtp.gmail.com with ESMTPSA id y30sm277344pff.67.2020.03.18.18.54.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Mar 2020 18:54:25 -0700 (PDT) Subject: Re: RoCE v2 packet size To: Dimitris Dimitropoulos , linux-rdma@vger.kernel.org References: From: Zhu Yanjun Message-ID: <900a17aa-cadd-46a5-9f15-246d5f65cd1d@gmail.com> Date: Thu, 19 Mar 2020 09:54:22 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Please refer to SoftRoCE. On 3/19/2020 6:57 AM, Dimitris Dimitropoulos wrote: > Hi, > > In RoCE v2 there various options for the protocol packet size: 4096, > 2048, etc. To what does this number refer to exactly. Is it the > payload that ends up in the QP buffers, or does it include headers > some of the headers as well ? > > Thank you. > > Dimitris