netdev - Re: [PATCH] Make CUBIC Hystart more robust to RTT variations

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Message-ID: <20110308181428.GA12020@xanadu.blop.info>
Date:	Tue, 8 Mar 2011 19:14:28 +0100
From:	Lucas Nussbaum <lucas.nussbaum@...ia.fr>
To:	Sangtae Ha <sangtae.ha@...il.com>
Cc:	WANG Cong <xiyou.wangcong@...il.com>, Injong Rhee <rhee@...u.edu>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] Make CUBIC Hystart more robust to RTT variations

On 08/03/11 at 11:43 -0500, Sangtae Ha wrote:
> Hi Lucas,
> 
> The current packet-train threshold and the delay threshold have been tested
> with the bandwidth ranging from 10M to 400M, the RTT from 10ms to 320ms, and
> the buffer size from 10% BDP to 200% BDP and they were set conservatively to
> make it work over the network with very small buffer sizes. I will recreate
> your setup and check whether the current thresholds are too conservative and
> will come up with the patch.

I'm surprised. It's possible that a seemingly unrelated change broke it,
but it was already broken for me on 2.6.32.
I can provide access to the testbed if you want to run tests on it.
-- 
| Lucas Nussbaum             MCF Université Nancy 2 |
| lucas.nussbaum@...ia.fr         LORIA / AlGorille |
| http://www.loria.fr/~lnussbau/  +33 3 54 95 86 19 |
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