netdev - Instantaneous Threshold ECN marking for DCTCP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CADn3pMdDr=MmTyeZJ0ofacy+gcTC2qKJpWxp9gdBCpr+cfJzHA@mail.gmail.com>
Date:	Thu, 17 Dec 2015 08:13:49 -0800
From:	Bryce Cronkite-Ratcliff <brycecr@...il.com>
To:	netdev@...r.kernel.org
Subject: Instantaneous Threshold ECN marking for DCTCP

Hi there,

I am attempting to run some experiments with DCTCP using mininet (so
this is all user-level emulation -- my switch is a linux namespace
using OVS). My question is on how to apply DCTCP's AQM. DCTCP's AQM
just marks all packets with CE if they are received when the queue is
over a threshold value of K and otherwise does not mark CE. The DCTCP
papers I have seen suggest that RED can be used to achieve this: set
probability to 1, burst to 1, and min and max to the same value.

However, tc-red, in accordance with this paper, does not allow burst
to be significantly below the minimum threshold value, so I am unable
to set the parameters I would like -- in particular to set burst to 1
-- without monkey-patching tc.

Is there a way to achieve this simple threshold-ECN marking AQM with
tc, or another approach?

Thank you!
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html