From owner-freebsd-infiniband@freebsd.org Sun Sep 8 01:26:51 2019 Return-Path: Delivered-To: freebsd-infiniband@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 780E1E3D8D for ; Sun, 8 Sep 2019 01:26:51 +0000 (UTC) (envelope-from bacon4000@gmail.com) Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46Qttf4XKmz4Kr3 for ; Sun, 8 Sep 2019 01:26:50 +0000 (UTC) (envelope-from bacon4000@gmail.com) Received: by mail-io1-xd2c.google.com with SMTP id f12so21102267iog.12 for ; Sat, 07 Sep 2019 18:26:50 -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=ZyXZAe8883PdkmKiBmv8cwMNbQKufPVH7MiVaZRNZ80=; b=Kv5XuHF7C0go33Inp+eZyBZYPVH56FJaEuFg733C1UDOB326VXuof0+aT9oZnhjAkM VqiKe/aiPk9Q0SaT8PO0+VGm6l8rL8ILZRBNkPRn18yR3kYrEOI5YBYiuNIhsmHMFne5 rbGb7S8HIXLw9WP0vMXU2qkr2mcRXMVXVjjOzoB3wDWnO0Gw3PqOPiID/Eto1Nd68EhW P4mqq2u0EV9PZsWIGw3DTOpYJn6/hTsbje4peLO4ADVN/sF0j0bkIIMzD4e1FUjdn+Oq QaQqbwvadBjPjpKHu/aggGIA1K4O4y8O/6JZHB/6m/W07uFVD4sscc+hr8/iLqGERcR9 +uGw== 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=ZyXZAe8883PdkmKiBmv8cwMNbQKufPVH7MiVaZRNZ80=; b=W+dk8JrM9ifIc/YRHSKM3zB8RntjcMLWvcWlSM2OuAXvXlIfKqxwj9G7UbnxoGj+LN WoCNLNXvVgrPLLnE3YaB2bYwx/W4vFFWmfGD1gR8Dkn4HT8rszUw6Quyk5clH4QuFFfC txxsBeLEZrf1k6Ja8cARk3aDuKK8fEKfL+scgv5SfiTFAdyLJs0EOl6zpbtyHPrXi7HW rcayHD7sbFGRpzfZhNczJt/Q+qnIXdOPdkApLQbJmLFAoRd91SjoyoYNNSDngLl3lSnX ldKFFQc+r3uCpZ9nXIS3IxmeYTfEoutAsvEOwCU2NU1fVlHzj3TJ3q1IvFSeMzpGI7cz Pr1Q== X-Gm-Message-State: APjAAAWccgvGCkCnNXNugJ3YidsTw4oQODSbq2BSS7Ro90FIHRTgSj9E t4FU++EqK4frtzp5Sz4XLmPgcHgR X-Google-Smtp-Source: APXvYqzD9ITTmaBfLHkofW1dJrBzDdUHUl1c97W/XJ8kSb5jVyEyxtvpKD1+auTHQWMkzlhIjwCAaQ== X-Received: by 2002:a02:b882:: with SMTP id p2mr18347200jam.16.1567906008564; Sat, 07 Sep 2019 18:26:48 -0700 (PDT) Received: from mako.acadix.biz ([2605:a000:bc45:5f00:f2de:f1ff:fe17:e25f]) by smtp.gmail.com with ESMTPSA id x9sm6841986iol.23.2019.09.07.18.26.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 07 Sep 2019 18:26:47 -0700 (PDT) Subject: Re: Just joined the infiniband club To: John Fleming , freebsd-infiniband@freebsd.org References: From: Jason Bacon Message-ID: <00acac6f-3f13-a343-36c5-00fe45620eb0@gmail.com> Date: Sat, 7 Sep 2019 20:26:46 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Content-Language: en-US X-Rspamd-Queue-Id: 46Qttf4XKmz4Kr3 X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=Kv5XuHF7; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of bacon4000@gmail.com designates 2607:f8b0:4864:20::d2c as permitted sender) smtp.mailfrom=bacon4000@gmail.com X-Spamd-Result: default: False [-4.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-1.00)[-0.996,0]; FROM_EQ_ENVFROM(0.00)[]; IP_SCORE(0.00)[ip: (-5.30), ipnet: 2607:f8b0::/32(-2.75), asn: 15169(-2.27), country: US(-0.05)]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-infiniband@freebsd.org]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[c.2.d.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-infiniband@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Infiniband on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Sep 2019 01:26:51 -0000 On 2019-09-07 19:00, John Fleming wrote: > Hi all, i've recently joined the club. I have two Dell R720s connected > directly to each other. The card is a connectx-4. I was having a lot > of problem with network drops. Where i'm at now is i'm running > FreeBSD12-Stable as of a week ago and cards have been cross flashed > with OEM firmware (these are lenovo i think) and i'm no longer getting > network drops. This box is basically my storage server. Its exporting > a raid 10 ZFS volume to a linux (compute 19.04 5.0.0-27-generic) box > which is running GNS3 for a lab. > > So many questions.. sorry if this is a bit rambly! > > From what I understand this card is really 4 x 25 gig lanes. If i > understand that correctly then 1 data transfer should be able to do at > max 25 gig (best case) correct? > > I'm not getting what the difference between connected mode and > datagram mode is. Does this have anything to do with the card > operating in infiniband mode vs ethernet mode? FreeBSD is using the > modules compiled in connected mode with shell script (which is really > a bash script not a sh script) from freebsd-infiniband page. Nothing to do with Ethernet... Google turned up a brief explanation here: https://wiki.archlinux.org/index.php/InfiniBand Those are my module building scripts on the wiki.=C2=A0 What bash extensi= ons=20 did you see? > > Linux box complains if mtu is over 2044 with expect mulitcast drops or > something like that so mtu on both boxes is set to 2044. > > Everything i'm reading makes it sound like there is no RDMA support in > FreeBSD or maybe that was no NFS RDMA support. Is that correct? RDMA is inherent in Infiniband AFAIK.=C2=A0 Last I checked, there was no = support in FreeBSD for NFS over RDMA, but news travels slowly in this=20 group so a little digging might prove otherwise. > > So far it seems like these cards struggle to full 10 gig pipe. Using > iperf (2) the best i'm getting is around 6gb(bit) sec. Interfaces > aren't showing drops on either end. Doesn't seem to matter if i do 1, > 2 or 4 threads on iperf. You'll need both ends in connected mode with a fairly large MTU to get=20 good throughput.=C2=A0 CentOS defaults to 64k, but FreeBSD is unstable at= =20 that size last I checked.=C2=A0 I got good results with 16k. My FreeBSD ZFS NFS server performed comparably to the CentOS servers,=20 with some buffer space errors causing the interface to shut down (under=20 the same loads that caused CentOS servers to lock up completely).=C2=A0=20 Someone mentioned that this buffer space bug has been fixed, but I no=20 longer have a way to test it. Best, =C2=A0=C2=A0=C2=A0 Jason --=20 Earth is a beta site.