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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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigEDFBD674DA051D5C5011184D Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable Kevin Oberman schrieb am 18.02.2010 20:23 (localtime): =2E.. > 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 =2E.. > 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=20 missunderstanding was that I thought the receiver would reduce ACKs...=20 Now I know more :) But unfortunately that makes it more mysterious where the throughput=20 problem lies... Thanks to everyone so far, -Harry --------------enigEDFBD674DA051D5C5011184D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAkt9tBQACgkQLDqVQ9VXb8i3YwCggQEo/kEyKDdb3TxU7hTzhQfm i2gAoKs+4d2XbG3NtN1b9rgu6zJVC7vD =2Ckw -----END PGP SIGNATURE----- --------------enigEDFBD674DA051D5C5011184D--
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