From: Stephen Hemminger <shemminger@linux-foundation.org>
To: David Miller <davem@davemloft.net>
Cc: ilpo.jarvinen@helsinki.fi, netdev@vger.kernel.org
Subject: Re: [PATCH net-2.6 1/2] [TCP]: Fix ratehalving with bidirectional flows
Date: Tue, 31 Jul 2007 14:37:26 +0100 [thread overview]
Message-ID: <20070731143726.3fecfe86@oldman.hamilton.local> (raw)
In-Reply-To: <20070731.025827.07638506.davem@davemloft.net>
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I noticed no difference in the two flow tests. That is not a bad thing, just
that this test doesn't hit that code.
The anomaly is that first flow does slow start then gets loss and ends up
reducing it's window size all the way to the bottom, finally it recovers.
This happens with Cubic, H-TCP and others as well; if the queue in the
network is large enough, they don't handle the initial loss well.
See the graph.
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next prev parent reply other threads:[~2007-07-31 13:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-30 17:16 [PATCH net-2.6 0/2] [TCP]: Fix bidirectional brokeness Ilpo Järvinen
2007-07-30 17:18 ` [PATCH net-2.6 1/2] [TCP]: Fix ratehalving with bidirectional flows Ilpo Järvinen
2007-07-31 2:49 ` David Miller
2007-07-31 4:59 ` Ilpo Järvinen
2007-07-31 5:21 ` David Miller
2007-07-31 9:51 ` Stephen Hemminger
2007-07-31 9:58 ` David Miller
2007-07-31 13:37 ` Stephen Hemminger [this message]
2007-07-31 15:59 ` Ilpo Järvinen
2007-07-30 17:19 ` [PATCH net-2.6 2/2] [TCP]: Bidir flow must not disregard SACK blocks for lost marking Ilpo Järvinen
2007-07-31 2:53 ` David Miller
2007-07-31 5:33 ` Ilpo Järvinen
2007-07-31 2:54 ` [PATCH net-2.6 0/2] [TCP]: Fix bidirectional brokeness David Miller
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