From owner-freebsd-xen@freebsd.org Tue Jun 25 08:21:19 2019 Return-Path: Delivered-To: freebsd-xen@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 51B3015C45A6 for ; Tue, 25 Jun 2019 08:21:19 +0000 (UTC) (envelope-from roger.pau@citrix.com) Received: from esa5.hc3370-68.iphmx.com (esa5.hc3370-68.iphmx.com [216.71.155.168]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "esa5.hc3370-68.iphmx.com", Issuer "HydrantID SSL ICA G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0146F77644 for ; Tue, 25 Jun 2019 08:21:17 +0000 (UTC) (envelope-from roger.pau@citrix.com) Received-SPF: None (esa5.hc3370-68.iphmx.com: no sender authenticity information available from domain of roger.pau@citrix.com) identity=pra; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="roger.pau@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa5.hc3370-68.iphmx.com: domain of roger.pau@citrix.com designates 162.221.158.21 as permitted sender) identity=mailfrom; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="roger.pau@citrix.com"; x-conformance=sidf_compatible; x-record-type="v=spf1"; x-record-text="v=spf1 ip4:209.167.231.154 ip4:178.63.86.133 ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4 ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88 ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ~all" Received-SPF: None (esa5.hc3370-68.iphmx.com: no sender authenticity information available from domain of postmaster@mail.citrix.com) identity=helo; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: KOrvZNNgOobr7c2fH4jrQK9OQ6R+IFOhdDLozf16eyPosMHlbQTgfOUbCpa1V9lUMEP6sxMFDo O8PUU23zrkKoTn5Vm1ccoci6uKh0KC3Ndzkeujwo5slNX4DG85108lTKBR91iYCSlQXPdRHcme Ju1g1jWSi3zsR68Zotq8PXhvUNcA2dMbe97ccq31p/FF3EZhJSbxXkbLRw0nFrO6vKDgethb3m wKoW0RzPBTBSrhEidp3YedbWR6RmHeOYm5VDNlEma+r1H06o7NtH8EZ/hZcq/0aQZD+69MODil k/M= X-SBRS: 2.7 X-MesageID: 2175570 X-Ironport-Server: esa5.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.63,415,1557201600"; d="scan'208";a="2175570" Date: Tue, 25 Jun 2019 10:21:03 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Christian M CC: Subject: Re: Very slow and inconsistent internal network speed (between, VM's on the same host) for FreeBSD 11.0+ as guest on, XCP-ng/XenServer Message-ID: <20190625082103.qiiz2cikrauaqlas@MacBook-Air-de-Roger.local> References: <12994df1-f847-ec92-aae8-43a32e59385f@darco.dk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 X-ClientProxiedBy: AMSPEX02CAS02.citrite.net (10.69.22.113) To AMSPEX02CL02.citrite.net (10.69.22.126) X-Rspamd-Queue-Id: 0146F77644 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; spf=pass (mx1.freebsd.org: domain of roger.pau@citrix.com designates 216.71.155.168 as permitted sender) smtp.mailfrom=roger.pau@citrix.com X-Spamd-Result: default: False [-4.41 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:216.71.155.168]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[citrix.com]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com,mx1.hc3370-68.iphmx.com,mx2.hc3370-68.iphmx.com]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[168.155.71.216.list.dnswl.org : 127.0.3.0]; NEURAL_HAM_SHORT(-0.97)[-0.967,0]; IP_SCORE(-1.14)[ip: (-2.80), ipnet: 216.71.154.0/23(-1.73), asn: 16417(-1.09), country: US(-0.06)]; FREEMAIL_TO(0.00)[gmail.com]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:16417, ipnet:216.71.154.0/23, country:US]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Jun 2019 08:21:19 -0000 On Mon, Jun 24, 2019 at 10:24:09PM +0200, Christian M wrote: > Thanks for your input Bjarne. > > Previously I tested with iperf2, but I have made som tests with iperf3 now > also and noticed there are a lot of "Retr" (TCP retries) in some cases. > Went back here to your post and saw that your results also showed a lot of > retries in some cases. My new tests showed similar results to yours > (although not nearly as hi throughput as you have). When Linux is client > the retries are 0, with FreeBSD as client the number is > 0. Can you figure out what caused those retries? Wrong MTU, bad checksums? > I'm not sure > if our numbers are considered high though, and something that actually is a > problem? Although, on a internal network with no external factors like > interference, I feel this should always be 0 no matter what? If properly configured yes, there should be no retries when doing intra-VM connections. Thanks, Roger.