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 A67D5C49ED7 for ; Fri, 20 Sep 2019 10:04:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 792732070C for ; Fri, 20 Sep 2019 10:04:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hJiXwCjx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389030AbfITKEs (ORCPT ); Fri, 20 Sep 2019 06:04:48 -0400 Received: from mail-wr1-f41.google.com ([209.85.221.41]:37294 "EHLO mail-wr1-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393385AbfITKEs (ORCPT ); Fri, 20 Sep 2019 06:04:48 -0400 Received: by mail-wr1-f41.google.com with SMTP id i1so6125399wro.4 for ; Fri, 20 Sep 2019 03:04:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:references:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=uTZxGQ78P7KhZVbZZi6L74Ld9LI/dh/LCCq39qoJxh0=; b=hJiXwCjx9WaO5eaSmUgVfe/UxEaWQR6/quY5o3xlQTKxGaCkOD+97Ts6OybgScXsL+ KB2e0v3EIxiEMmSHlw5f85mcP4yyyiIAnjsQhP9KqF92bu5bn+Xcmo2wp3Bwf0dmfv1o vOHnm2bb5r9/uLXhF1fKylBEVER5y5UxwukWBTbGG2qcyiySa3rDi86hT4dtwu4wwJ7B koh1BJSJTfgNi1fbyAWZa2K1B90RPfieRg9U3dcMuwxm9evnRC7mGp817VgTKDQfkTwK kHqVBZEzsHHxxdsgdg/JAQNb8F0iZI53sQEny+zxgTIoAuv+5MLbSZSdtB+C3iR8W8iI 3VMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=uTZxGQ78P7KhZVbZZi6L74Ld9LI/dh/LCCq39qoJxh0=; b=Ka9jz3cbFcRQDw/Vq0N/COWH4TbdOHMVwiHuUojXhJXTFGCRgp6aUH9GbHz93Dr5rT hh6s6Kemij3EA4qB/wregZKNyVKgBRY5sxiBKMGNA9FFW+OMuZBM4zSKs6ZJHKUOnXup lb6qEdnnXXWDHuFPU8JTxtfJQ3YXSbF9FbcQXcte5eM0UR/sSVN7KvnfiSD7zvxotyQ4 ezYdGVc69cIK2PcISCx9xOGWS3ki3i7mMTV4a2p5YUqMwjvdW7ZtPZNFQ8kSKxVU5/S0 CnzPBHEJ3BMfZEul8NrHzVTLWmRS7WGhSO1Qi0G6tNKzMBy+Hf8OBXkzVf24LvSdnqn5 sYNQ== X-Gm-Message-State: APjAAAXqR+ikfvf/GJJEH+SKr78yHSxygHlxyhkmXLIItPT94RStBCvD 8qhS3o+Z+0zI7EQCzjjsEubJME5d X-Google-Smtp-Source: APXvYqztCRaBXnwo9Qky8VeZdyseh8w+f47j684QoZ5KczaVGfg6MMVgQ6M1INYyIwMKvi3OHI1B7Q== X-Received: by 2002:adf:ce86:: with SMTP id r6mr10907267wrn.57.1568973884807; Fri, 20 Sep 2019 03:04:44 -0700 (PDT) Received: from [10.161.254.11] (srv1-dide.ioa.sch.gr. [81.186.20.0]) by smtp.googlemail.com with ESMTPSA id 189sm2263748wma.6.2019.09.20.03.04.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 20 Sep 2019 03:04:44 -0700 (PDT) Subject: Re: rsize,wsize=1M causes severe lags in 10/100 Mbps From: Alkis Georgopoulos To: Trond Myklebust , "linux-nfs@vger.kernel.org" References: <3d00928cd3244697442a75b36b75cf47ef872657.camel@hammerspace.com> <7afc5770-abfa-99bb-dae9-7d11680875fd@gmail.com> <915fa536-c992-3b77-505e-829c4d049b02@gmail.com> <1d5f6643330afd2c04350006ad2a60e83aebb59d.camel@hammerspace.com> <5601db40-ee2f-262d-7d01-5c589c9a07eb@gmail.com> <20190919211912.GA21865@cosmos.ssec.wisc.edu> <503c22ad34b3f3a15015b7384bcad469b2899cb4.camel@hammerspace.com> <20190919221601.GA30751@cosmos.ssec.wisc.edu> <0213704b-3930-5be6-bd3d-dbaabc24a270@gmail.com> <1e7c9896-eb1b-9d7c-fff0-6df2b3d96392@gmail.com> Message-ID: <6fa596e9-b154-310e-9685-7663731618ba@gmail.com> Date: Fri, 20 Sep 2019 13:04:43 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <1e7c9896-eb1b-9d7c-fff0-6df2b3d96392@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org On 9/20/19 12:48 PM, Alkis Georgopoulos wrote: > I did test the boot bandwidth (I mean how many MB were transferred). > On ext4-over-NFS, with tmpfs-and-overlayfs to make root writable: I also tested with the kernel netbooting default of rsize=4K to compare. All on 100 Mbps, tcp,timeo=600: | rsize | MB to boot | sec to boot | |-------|------------|-------------| | 1M | 1250 | 84 | | 32K | 471 | 40 | | 4K | 320 | 31 | | 2K | 355 | 34 | It appears matching rsize=cluster size=4K gives the best results. Thank you, Alkis Georgopoulos