From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id DC3DE3B25E for ; Sat, 11 Jun 2016 04:25:43 -0400 (EDT) Received: from [10.75.80.71] ([80.187.104.61]) by mail.gmx.com (mrgmx103) with ESMTPSA (Nemesis) id 0MU0U9-1b2XRr0AkL-00QkP8; Sat, 11 Jun 2016 10:25:39 +0200 User-Agent: K-9 Mail for Android In-Reply-To: <1465595130.805432550@apps.rackspace.com> References: <55fdf513-9c54-bea9-1f53-fe2c5229d7ba@eggo.org> <871t4as1h9.fsf@toke.dk> <3D32F19B-5DEA-48AD-97E7-D043C4EAEC51@gmail.com> <1465267957.902610235@apps.rackspace.com> <1465268329.938313737@apps.rackspace.com> <1465595130.805432550@apps.rackspace.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----MGVBONP4O35M6N4UZ1FM34Z5F6DYJR" Content-Transfer-Encoding: 7bit From: Sebastian Moeller Date: Sat, 11 Jun 2016 10:25:30 +0200 To: dpreed@reed.com,Eric Johansson CC: cerowrt-devel@lists.bufferbloat.net Message-ID: X-Provags-ID: V03:K0:kzCcXyt49SGab+AscxZ/Y8laYNdDxpdTvETwBOXHYijK5C7mHwu JKYSeFUCNS2zzTW+jlRwPHEObWIGX96Cd+6+IM87DVfOQeYvBuDux07pVm51/dcRcKF1lUl /Z9RxrMkzhgGIcRhSeJYCRbQQ5DtKpB17/EGVI+Wz/DoMvRPjkFsf0GCZWGVm+vlGu0aH+n s/h+4JEZXmVLfPVjKwNXQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:ueQfrhSrkjg=:H3m2aIRQhK3r08nGrHD/Hb /zbOD7HI6GKb5oMZD+Im+WrgcTtNaXPDaulRJPNnzYYFmS2NzW+MLpWd20fwJJCKkRuCMXKb/ rKCXJJnQUgyKi2w1ogeYBEN+j7uVSfG7ekdCz9CjlShmId5mB4OCLrmhd0fiR9uW7+egsG7X+ 75KW+PKbTY9h2TD0LmJq3RByVQIMZohfeshXq3flTR/O5jKHdZhBmEATr6mVVvmKTXKU/86Zx f0Y380/nipzKL5XVzpZP5PNms+iam9aX4W5HJOwVdUmZY4c0Z66y5RN9f5aJjDNVfOeF0dngc jl/Ofa1FIVtPcPP4l/mx+5pobxbEcgpWypaHgnIjJywz3vAIk4nSe4gFeNzIMgPkA9MYbI0/k n6d4jSRmQ7elFxRpwi0RIvY9ymilk4ZpV1YB+Ao60l6/vpoEkl3dTWczI4HKviNL3L8/WcVYS OzykN9YQBTaSpIlj23rL3/qY+7Lh/tq5slw1cl+lzEkO3cL+BK+FZ3cnDcbfVBzrffFcMkEfL pRbjXsNYYoHQI5VSoeoiIwYpVqIY26UCKs90WyJdwMiBuIw01pEyYLMMDwsncLKpmlKIRh+uE vPiBgocVrffHO+NHvBG2nryL96IjvB2Ryzn0hSriscflsh+Dy++nS6R2AO35o/rTDRIS21ff4 7Ikol6kMDD5nJ+8xE5yjIZHwnaqh+WXoe0oH0PAREpAqGH/8nFmrazq+0fP9N8Q4WWyjqRK1I FdNjvVfGtHIpU0hXm8a0wKUzgC22SXqGglnfe5ixVo5/1FFgwO+Hl81xMvLVgsgriqIur6ga5 yWDCAGh Subject: Re: [Cerowrt-devel] trying to make sense of what switch vendors say wrt buffer bloat X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 11 Jun 2016 08:25:44 -0000 ------MGVBONP4O35M6N4UZ1FM34Z5F6DYJR Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, Maybe https://github=2Ecom/jwbensley/Etherate/blob/master/README=2Emd coul= d be of use here? Have not used it myself but it seems to at least partly m= atch your requirements based on reading the readme=2E=2E=2E Best Regards Sebastian On June 10, 2016 11:45:30 PM GMT+02:00, dpreed@reed=2Ecom wrote: > >Just today I found out that a datacenter my company's engineering group >is expanding into is putting us on Arista 7050's=2E And our very >preliminary tests of our systems there is showiung what seems to be a >latency problem under load=2E I can't get in the way of the deployment >process, but it's interesting/worrying that "big buffers" are there in >the middle of our system, which is highly latency sensitive=2E > >I may also need a diagnostic test that would detect the potential >occurence of bufferbloat within a 10 GigE switch, now=2E Our software >layers are not prepared to self-diagnose at the ethernet layer very >well=2E > >My thought is to use an ethernet ping while our system is loaded=2E (our >protocol is at the Ethernet layer, no IP stack)=2E Anyone have an idea of >the simplest way to do that? > >On Tuesday, June 7, 2016 1:51pm, "Eric Johansson" said: > > > >=20 > >On 6/6/2016 10:58 PM, [ dpreed@reed=2Ecom ]( mailto:dpreed@reed=2Ecom ) >wrote: >Even better, it would be fun to get access to an Arista switch and some >high performance TCP sources and sinks, and demonstrate extreme >bufferbloat compared to a small-buffer switch=2E Just a demo, not a >simulation full of assumptions and guesses=2E >I'm in the middle of a server room/company move=2E I can make a >available a XSM4348S NETGEAR M4300-24X24F, and probably an arista >7050T-52 for a short time frame as part of my "testing"=2E tell me what >you need for a test setup, give me a script I can run and where I >should send the results=2E I really need a cut and paste test because I >have no time to think about anything more than the move=2E > > thanks=2E > > > >------------------------------------------------------------------------ > >_______________________________________________ >Cerowrt-devel mailing list >Cerowrt-devel@lists=2Ebufferbloat=2Enet >https://lists=2Ebufferbloat=2Enet/listinfo/cerowrt-devel --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E ------MGVBONP4O35M6N4UZ1FM34Z5F6DYJR Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi,

Maybe https://github=2Ecom/jwbensley/Etherate/blob/master/README=2Emd= could be of use here? Have not used it myself but it seems to at least par= tly match your requirements based on reading the readme=2E=2E=2E

Best Regards
Sebastian

On June 10, 2016 11:45:= 30 PM GMT+02:00, dpreed@reed=2Ecom wrote:

Just today I found out that a= datacenter my company's engineering group is expanding into is putting us = on Arista 7050's=2E And our very preliminary tests of our systems ther= e is showiung what seems to be a latency problem under load=2E &n= bsp;I can't get in the way of the deployment process, but it's interesting/= worrying that "big buffers" are there in the middle of our system, which is= highly latency sensitive=2E

I may also need a diagnostic t= est that would detect the  potential occurence of bufferbloat within a= 10 GigE switch, now=2E  Our software layers are not prepared to self-= diagnose at the ethernet layer very well=2E

<= br />My thought is to use an ethernet ping while our system is loaded=2E &n= bsp;(our protocol is at the Ethernet layer, no IP stack)=2E Anyone have&nbs= p;an idea of the simplest way to do that?

=
On Tuesday, June 7, 2016 1:51pm, "Eric Johansson" <esj@eggo=2Eorg&= gt; said:

 


On 6/6/2016 = 10:58 PM, dpreed@reed=2Ecom wrote:

Even better, it would be fun to get access= to an Arista switch and some high performance TCP sources and sinks, and d= emonstrate extreme bufferbloat compared to a small-buffer switch=2E  J= ust a demo, not a simulation full of assumptions and guesses=2E


I'm in the middle of a server room/company move=2E  I ca= n make a available a  XSM4348S NETGEAR M4300-24X24F, and probably an a= rista 7050T-52 for a short time frame as part of my "testing"=2E  tell= me what you need for a test setup, give me a script I can run and where I = should send the results=2E  I really need a cut and paste test because= I have no time to think about anything more than the move=2E

t= hanks=2E


Ce=
rowrt-devel mailing list
Cerowrt-devel@lists=2Ebufferbloat=2Enet
=
https:=
//lists=2Ebufferbloat=2Enet/listinfo/cerowrt-devel

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Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E ------MGVBONP4O35M6N4UZ1FM34Z5F6DYJR--