From owner-freebsd-stable@FreeBSD.ORG Fri Apr 9 16:45:05 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F1846106566B for ; Fri, 9 Apr 2010 16:45:05 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id 7F7EB8FC21 for ; Fri, 9 Apr 2010 16:45:04 +0000 (UTC) Received: by wyb28 with SMTP id 28so151859wyb.13 for ; Fri, 09 Apr 2010 09:45:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:cc:content-type; bh=mXIoSaElTd2Pne9hW5tP+ENEl7IkRGr3jCDt7GlEHnk=; b=CXW767dMT80ASBELFI6l2BX+IddughAjsyXAze5PS6ew00fBfBDM9QWHTDZKhbCO7/ SHhIat7vq1waFIK4ZHvpEMOJU+g6nVszf1keF9MXm780FFM/xunisT28ZmX7XRmF0/+F wZq1N4WFC1UTdSFS3MDHyT28XoF7jzuuUcacs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=jDf3QnoFLFYQHers883DB6jM3WX4p5lP1p5lXR86isp0Gg1uCJmfCQjuNjFQFsjc4k 20uXbCdexZ7Y0oN/6TEnMew7TRCr3wu43vkmP1MmHT+L61riIdmFoeJTQr5smkJ43XSW FS/Z4ie2Q/BCakrwMg3haBdB6G0msMCur9QLI= MIME-Version: 1.0 Received: by 10.216.11.8 with HTTP; Fri, 9 Apr 2010 09:45:03 -0700 (PDT) In-Reply-To: <20100409164115.GB1085@michelle.cdnetworks.com> References: <201004081313.o38DD4JM041821@lava.sentex.ca> <201004081446.o38EkU7h042296@lava.sentex.ca> <20100408181741.GI5734@michelle.cdnetworks.com> <201004081831.o38IVR3s043434@lava.sentex.ca> <20100408205626.GN5734@michelle.cdnetworks.com> <201004082105.o38L5DCH044187@lava.sentex.ca> <20100408230750.GR5734@michelle.cdnetworks.com> <201004091317.o39DHFEl049965@lava.sentex.ca> <20100409164115.GB1085@michelle.cdnetworks.com> Date: Fri, 9 Apr 2010 09:45:03 -0700 Received: by 10.216.87.147 with SMTP id y19mr169847wee.136.1270831503496; Fri, 09 Apr 2010 09:45:03 -0700 (PDT) Message-ID: From: Jack Vogel To: pyunyh@gmail.com Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: em driver regression X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Apr 2010 16:45:06 -0000 On Fri, Apr 9, 2010 at 9:41 AM, Pyun YongHyeon wrote: > On Fri, Apr 09, 2010 at 09:17:07AM -0400, Mike Tancsa wrote: > > At 07:07 PM 4/8/2010, Pyun YongHyeon wrote: > > >On Thu, Apr 08, 2010 at 02:06:09PM -0700, Jack Vogel wrote: > > >> Only one device support by em does multiqueue right now, and that is > > >> Hartwell, 82574. > > >> > > > > > >Thanks for the info. > > > > > >Mike, here is updated patch. Now UDP bulk TX transfer performance > > >recovered a lot(about 890Mbps) but it still shows bad numbers > > >compared to other controllers. For example, bce(4) shows about > > >958Mbps for the same load. > > >During the testing I found a strong indication of packet reordering > > >issue of drbr interface. If I forcibly change to use single TX > > >queue, em(4) got 950Mbps as it used to be. > > > > > >Jack, as we talked about possible drbr issue with igb(4), UDP > > >transfer seems to suffer from packet reordering issue here. Can we > > >make em(4)/igb(4) use single TX queue until we solve drbr interface > > >issue? Given that only one em(4) controller supports multiqueue, > > >dropping multiqueue support for em(4) does not look bad to me. > > > > No watchdog errors over night. I wonder if the issue was due to > > 100Mb, or the patch from current fixed it. I will try today with the > > new patch below! I am guessing the rejection was due to the RX/TX fix ? > > > > The patch was generated against latest HEAD. This includes Jack's > latest fix too so it may not be applied cleanly on stable/8. > I think you can use em(4) in HEAD. > Yes, you can. And I think its the code change not the speed Mike. Jack