From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <mcr@sandelman.ca>
Received: from tuna.sandelman.ca (tuna.sandelman.ca
 [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by lists.bufferbloat.net (Postfix) with ESMTPS id C46E53B29E
 for <bloat@lists.bufferbloat.net>; Mon, 30 Jul 2018 22:59:06 -0400 (EDT)
Received: from sandelman.ca (obiwan.sandelman.ca [IPv6:2607:f0b0:f:2::247])
 by tuna.sandelman.ca (Postfix) with ESMTP id 794C920090
 for <bloat@lists.bufferbloat.net>; Mon, 30 Jul 2018 23:15:37 -0400 (EDT)
Received: by sandelman.ca (Postfix, from userid 179)
 id 249B61826; Mon, 30 Jul 2018 22:59:06 -0400 (EDT)
Received: from sandelman.ca (localhost [127.0.0.1])
 by sandelman.ca (Postfix) with ESMTP id 21F8E1802
 for <bloat@lists.bufferbloat.net>; Mon, 30 Jul 2018 22:59:06 -0400 (EDT)
From: Michael Richardson <mcr@sandelman.ca>
To: bloat@lists.bufferbloat.net
In-Reply-To: <CAA93jw6xj_-qUaeHBn-aoCKGAzG+KF0f3dCqcatYSAshUU6Mng@mail.gmail.com>
References: <CAA93jw6xj_-qUaeHBn-aoCKGAzG+KF0f3dCqcatYSAshUU6Mng@mail.gmail.com>
X-Mailer: MH-E 8.6; nmh 1.7+dev; GNU Emacs 24.5.1
X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0;
 <'$9xN5Ub#
 z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m<nPbLgmtKK-5dC@#:k
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="=-=-=";
 micalg=pgp-sha1; protocol="application/pgp-signature"
Date: Mon, 30 Jul 2018 22:59:06 -0400
Message-ID: <22964.1533005946@localhost>
Subject: [Bloat] bufferbloat vs NetSpectre
X-BeenThere: bloat@lists.bufferbloat.net
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: General list for discussing Bufferbloat <bloat.lists.bufferbloat.net>
List-Unsubscribe: <https://lists.bufferbloat.net/options/bloat>,
 <mailto:bloat-request@lists.bufferbloat.net?subject=unsubscribe>
List-Archive: <https://lists.bufferbloat.net/pipermail/bloat>
List-Post: <mailto:bloat@lists.bufferbloat.net>
List-Help: <mailto:bloat-request@lists.bufferbloat.net?subject=help>
List-Subscribe: <https://lists.bufferbloat.net/listinfo/bloat>,
 <mailto:bloat-request@lists.bufferbloat.net?subject=subscribe>
X-List-Received-Date: Tue, 31 Jul 2018 02:59:06 -0000

--=-=-=
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable


I was reading through the NetSpectre paper at:
  http://misc0110.net/web/files/netspectre.pdf

I haven't finished it all yet... key thing was on page 5, which starts with:
      if (x < bitstream_length)
         if(bitstream[x])
            flag =3D true
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
As I understand it, they are depending error packets that come back to
measure cache fills from a background of packets that fail tests such as
above.

Two things occur to me:
   1) in a really badly bufferbloated network, the
      super-long queues ought to completely screw things up for them.

   2) fq_codel ought to something significant to the measurements.
      I don't know yet if it might them better or worse.  But,
      it ought to do something.

=2D-=20
]               Never tell me the odds!                 | ipv6 mesh network=
s [=20
]   Michael Richardson, Sandelman Software Works        | network architect=
  [=20
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails  =
  [=20
=09


--=-=-=
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEVAwUBW1/QeYCLcPvd0N1lAQIBMggArkiDELW7CzbhldGnlr54BH6TMqR5Kldh
QxWT1IIOzGDjE9jhGxDmkQ+O+Qts1JoFD1C2NS11g4SRhjGwvqpNeOWi+2iNrS2J
nC+CieiRgNhYFZNpTsVnOSegizxArpiGLZhX0pMAWqjFB4zyk3F4Od+dVcUcU6OV
GlMf410cfLcZWayHMVUEDTZxTOGSKw1+8Hbia8OgGUWJH5qBuv/c/UGyNFFnMBKr
pOZeGSRaUEZH6Qvx7j8EKVy/nihsnrjp5LREvc0VN3iIVb9C4OtJ++3BH/EiKx5v
lx04xIuf1aieAlwEeELiTYzf8H/0AdxYcVwd+U1RZ8W/2KqoQgRJ3w==
=vL6E
-----END PGP SIGNATURE-----
--=-=-=--