From owner-freebsd-xen@freebsd.org Mon Sep 14 23:31:08 2015 Return-Path: Delivered-To: freebsd-xen@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E0E2CA03515 for ; Mon, 14 Sep 2015 23:31:08 +0000 (UTC) (envelope-from syd.meyer@gmail.com) Received: from mail-wi0-x235.google.com (mail-wi0-x235.google.com [IPv6:2a00:1450:400c:c05::235]) (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 73CBF1B78 for ; Mon, 14 Sep 2015 23:31:08 +0000 (UTC) (envelope-from syd.meyer@gmail.com) Received: by wiclk2 with SMTP id lk2so5835977wic.0 for ; Mon, 14 Sep 2015 16:31:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=Lw7Ptp5uz/Lwh8RWjdiXmt0BfCOdwMiVO/+8It4iMKc=; b=QCKHeLy6WM71RDld0EC6/JsF0uibJT+A/vdsYKZFB0VuaA2ofE93DKTPQ1NTAz0EHe Gy8GRYYw5p0SejvRO5qAH4P1dpKBCAME6FXTx0vOSxlH4cTBXN+MJMgeP84VwBgHKr86 vlhXpy3uy2lim0bVZCkgkIsPsALswjlR7F2wTv5RKGhWavLA0dxrm9x12y5KOdjh++3A DmXKdaMwV7VlXx4UO5Dxmi15fN9djOSV+ohNjMnLSoi3x0uv7xt4XpYp3pqM5EBEGS+s mLM04dps0H27T3kSbCddoqj1S/fU6zC3BSJ8dZZ4dwbWES9IHcoXWsrqB8bCmHqGx4QX 4VcQ== X-Received: by 10.180.104.38 with SMTP id gb6mr999324wib.86.1442273466243; Mon, 14 Sep 2015 16:31:06 -0700 (PDT) Received: from ?IPv6:2a02:a03f:a50:e900:40c9:cb20:d3e6:a23f? ([2a02:a03f:a50:e900:40c9:cb20:d3e6:a23f]) by smtp.gmail.com with ESMTPSA id bi6sm17953899wjc.25.2015.09.14.16.31.05 for (version=TLS1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 14 Sep 2015 16:31:05 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.0 \(3094\)) Subject: Re: XenServer 6.5(SP1) - HVM 're0: watchdog timeout' errors... From: Sydney Meyer In-Reply-To: <55F6EF38.9040601@citrix.com> Date: Tue, 15 Sep 2015 01:31:04 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <38FDBA28-95BC-4730-8335-724439BAB142@gmail.com> References: <9CC4073DE17E3C8BD01EF7D3@[10.12.30.106]> <55EDA470.1000007@citrix.com> <55EDC55B.8000004@egr.msu.edu> <762F895FF087C3BBB6DB94DA@[10.12.30.106]> <55EFF61A.3020409@citrix.com> <34C596D4CD79963C95725C41@[10.12.30.106]> <55F025BF.6020405@citrix.com> <28F73DA3-DC56-47F4-922B-31D73D124981@gmail.com> <55F6EF38.9040601@citrix.com> To: freebsd-xen@freebsd.org X-Mailer: Apple Mail (2.3094) X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.20 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: Mon, 14 Sep 2015 23:31:09 -0000 I just read that you were working on importing a newer netfront from = Linux and thought that maybe this could help finding the culprint, as = KVM users seemed to have similar issues, e.g. issues with the offloading = capabilities of the pv nic and/or checksum errors. Anyhow, awesome news that you're on importing a new netfront. > On 14 Sep 2015, at 18:00, Roger Pau Monn=C3=A9 = wrote: >=20 > El 12/09/15 a les 0.13, Sydney Meyer ha escrit: >> I just noticed that these performance problems do not occur under = 10.0 and 10.1. >>=20 >> Starting with 10.2 IPv4 TCP performance drops from ~12 Gb/s under = 10.1 to ~350 Mb/s under 10.2. >>=20 >> Should i write a new bugreport for this? >=20 > Thanks for the report! I'm sorry I didn't realize it before and 10.2 > shipped with this performance regression. I've bisected it during the > weekend and found the culprit, fix is being worked on :). >=20 > = https://lists.freebsd.org/pipermail/svn-src-all/2014-September/091787.html= >=20 > Roger. >=20