From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x231.google.com (mail-wm0-x231.google.com [IPv6:2a00:1450:400c:c09::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 9443C3B29E for ; Tue, 7 Nov 2017 23:46:55 -0500 (EST) Received: by mail-wm0-x231.google.com with SMTP id r196so7823741wmf.2 for ; Tue, 07 Nov 2017 20:46:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=BM3YveEzubBToOYTmwR29EV5fSme+txQt92RwM8A8xY=; b=APu2AkU7lkSjHR75LQbtG/Gy/FEyxJxwTODhGvSlb85kdmpCRR2fpHWxbdtnu+nN9f IXPiH5b4xpPl6fu2GiHvUHYGwVWlqGyUoidDMGSJR+AXv/NRL2KRAmytosgnIAeLKY/6 qjWr0ahyfL9B7KqMaSphqGtacABnymmxrk4rg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=BM3YveEzubBToOYTmwR29EV5fSme+txQt92RwM8A8xY=; b=si/OMVWXnUmVRJouuXXGcbTFkRyxHquvZ4cBUr+DdHhklP3/v1nXRBvED16J2KcXaZ MODM9WRBFLABTKPrE1BQU17ReGA2YiL7bhpoDDzSE+OVX8cvBg/FMbvw6gPh6Q0ldAha OCVK/+Jf7h8tvFa7GaWFIYqx0IxDwrOePCgZ93hW8GO+O5cMTnQ0OW6QS39dKPeTU8LQ tOG0EON4DPW+XOEH2xenFCstQPRzNlgKwfLS/RoIuFCYute/WxsRxK6/CvGXTHvVxBUN 5yVWsfRhqJiY5dL9kfd7wzUdmgTPij4Z0yXFxJH2GMetq1teHcSLaYw+p4fIEoojYt16 AolQ== X-Gm-Message-State: AJaThX5zU56FuEqq7Jxf8Ip3rpKrD5zVx53WqU3ZIleGJshMPOr1VufQ tc+NfTfi6nZpGOHIePHlQ1NBzX1lj8gVa+dQ7s8rjA== X-Google-Smtp-Source: ABhQp+Rxxd7G8bO1+B5cqV42gYvQjlkdXUo15fB4gD1yRSjhtdVORSie6sElhaZfVPk5XeM4jNLCSEfHAhL7RbdWYl4= X-Received: by 10.80.182.116 with SMTP id c49mr1816199ede.124.1510116414413; Tue, 07 Nov 2017 20:46:54 -0800 (PST) MIME-Version: 1.0 Received: by 10.80.186.35 with HTTP; Tue, 7 Nov 2017 20:46:53 -0800 (PST) In-Reply-To: <954095A8-363F-42AE-B966-652790468859@gmail.com> References: <535CD0D7-CB3A-4C42-AB13-548313F9002A@gmail.com> <87o9oe2a8p.fsf@nemesis.taht.net> <186C017F-CAF4-4ED7-A3C3-A3B1B8A0A1BD@gmail.com> <954095A8-363F-42AE-B966-652790468859@gmail.com> From: Bob McMahon Date: Tue, 7 Nov 2017 20:46:53 -0800 Message-ID: To: Pete Heist Cc: make-wifi-fast@lists.bufferbloat.net Content-Type: multipart/alternative; boundary="94eb2c0df8c4738a43055d7160d7" Subject: Re: [Make-wifi-fast] Flent test hardware X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Nov 2017 04:46:55 -0000 --94eb2c0df8c4738a43055d7160d7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On conducted topologies, here are two common ones where ln are variable attenuator legs. The asterisk is a butler matrix or splitter/combiner in the relative center. A B \ / l1\ / l2 \ / * / \ l3/ \l4 / \ C D Then the power levels are controlled by variable attenuator legs, giving 4 degrees of freedom. A B \ / l1\ / l2 \ / * | l5 * / \ l3/ \l4 / \ C D This immediate above collapses to the star when l5 =3D 0. Otherwise l5 separates two BSSIDs as an example. The matrices are simple, eg. for the star: 1 1 0 0 1 0 1 0 0 0 1 1 0 1 0 1 Bob On Tue, Nov 7, 2017 at 2:21 AM, Pete Heist wrote: > I ordered 2x APU2: http://pcengines.ch/apu2c4.htm > > With 16GB mSATA SSDs, PSUs, cases and the serial cable I needed, the tota= l > came to 9097 CZK / 356 EUR / 412 USD. > > Happily, the igb Ethernet driver for its i210 NICs does support BQL and > appears to have hardware timestamping to boot. With three Ethernet ports, > I=E2=80=99ll get one for management, one for testing and one for PTP time= sync > straight to the other APU. > > I=E2=80=99m expecting the CPU PassMark (for what that=E2=80=99s worth) to= be around 1100, > 353 single core. That=E2=80=99s significantly less than other devices I w= as looking > at, but at least it=E2=80=99s a quad core, and at this price it=E2=80=99s= worth a try. > Since Jon reported his E-450 (PassMark 769, 431 single core) was capable = of > line-rate GigE, hopefully this will be as well. > > When they come I=E2=80=99ll run some benchmarks and report back how it go= es=E2=80=A6 > > > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast > --94eb2c0df8c4738a43055d7160d7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On conducted topologies, here are two common ones where ln= are variable attenuator legs.=C2=A0 The asterisk is a butler matrix or spl= itter/combiner in the relative center.=C2=A0

A=C2=A0 =C2= =A0 =C2=A0 =C2=A0B
=C2=A0 \=C2=A0 =C2=A0 =C2=A0/=C2=A0 =C2=A0 =C2=A0
l1\=C2=A0 =C2=A0/ l2
=C2=A0 =C2=A0 \ /
=C2=A0 = =C2=A0 =C2=A0*
=C2=A0 =C2=A0 / \
l3/=C2=A0 =C2=A0\l4
=C2=A0 /=C2=A0 =C2=A0 =C2=A0\
C=C2=A0 =C2=A0 =C2=A0 D
=
Then the power levels are controlled by variable attenuator = legs, giving 4 degrees of freedom.

A=C2=A0 =C2=A0 =C2=A0 =C2=A0= B
=C2=A0 \=C2=A0 =C2=A0 =C2=A0/=C2=A0 =C2=A0 =C2=A0
l1\=C2=A0 = =C2=A0/ l2
=C2=A0 =C2=A0 \ /
=C2=A0 =C2=A0 =C2=A0*
=C2=A0 =C2=A0 =C2=A0| l5
=C2=A0 =C2=A0 =C2=A0*
=C2=A0 = =C2=A0 / \
l3/=C2=A0 =C2=A0\l4
=C2=A0 /=C2=A0 =C2=A0 = =C2=A0\
C=C2=A0 =C2=A0 =C2=A0 D

Th= is immediate above collapses to the star when l5 =3D 0.=C2=A0 Otherwise l5 = separates two BSSIDs as an example.

The matrices are simple, eg. for= the star:

1 1 0 0
1 0 1 0
0 0= 1 1
0 1 0 1

Bob

On Tue, Nov 7, 2017 at 2:21= AM, Pete Heist <peteheist@gmail.com> wrote:
I ordered 2x = APU2:=C2=A0htt= p://pcengines.ch/apu2c4.htm

With 16GB mSA= TA SSDs, PSUs, cases and the serial cable I needed, the total came to 9097 = CZK / 356 EUR / 412 USD.

Happily, the igb Ethernet= driver for its i210 NICs does support BQL and appears to have hardware tim= estamping to boot. With three Ethernet ports, I=E2=80=99ll get one for mana= gement, one for testing and one for PTP time sync straight to the other APU= .

I=E2=80=99m expecting the CPU PassMark (for what= that=E2=80=99s worth) to be around 1100, 353 single core. That=E2=80=99s s= ignificantly less than other devices I was looking at, but at least it=E2= =80=99s a quad core, and at this price it=E2=80=99s worth a try. Since Jon = reported his E-450 (PassMark 769, 431 single core) was capable of line-rate= GigE, hopefully this will be as well.

When they c= ome I=E2=80=99ll run some benchmarks and report back how it goes=E2=80=A6


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Make-wifi-fast mailing list
Make-wifi-fast@list= s.bufferbloat.net
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