Date: Thu, 18 Feb 2010 22:41:28 +0100 From: Harald Schmalzbauer <h.schmalzbauer@omnilan.de> To: Kevin Oberman <oberman@es.net> Cc: Patrick Mahan <mahan@mahan.org>, freebsd-stable@freebsd.org, Stephen Hurd <shurd@sasktel.net> Subject: Re: RELENG_8 ignoring TCP window size? [Was: Re: Help for TCP understanding wanted, ACK-MSS-Window [Was: Re: best practice to watch TCP parms of established sockets]] Message-ID: <4B7DB408.9010706@omnilan.de> In-Reply-To: <20100218192320.B34251CC09@ptavv.es.net> References: <20100218192320.B34251CC09@ptavv.es.net>
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[-- Attachment #1 --] Kevin Oberman schrieb am 18.02.2010 20:23 (localtime): ... > window allows for many packets to be in flight and with a 3 Gbps flow, > that is a LOT of data. While an ACK is sent every two packets of > received data, the transmitting side does not wait for the ACKs. It ... > That is a VERY simple and incomplete explanation of what is happening > with the window, but most of that is irrelevant in local transfers with Thanks a lot, then I understood it at least half correct ;) My missunderstanding was that I thought the receiver would reduce ACKs... Now I know more :) But unfortunately that makes it more mysterious where the throughput problem lies... Thanks to everyone so far, -Harry [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAkt9tBQACgkQLDqVQ9VXb8i3YwCggQEo/kEyKDdb3TxU7hTzhQfm i2gAoKs+4d2XbG3NtN1b9rgu6zJVC7vD =2Ckw -----END PGP SIGNATURE-----
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