Date: Thu, 10 Apr 2003 15:29:16 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Mattias Pantzare <pantzer@ludd.luth.se> Cc: David Gilbert <dgilbert@velocet.ca> Subject: Re: tcp_output starving -- is due to mbuf get delay? Message-ID: <3E95F03C.2A01561D@mindspring.com> References: <20030410171640.C44793B2@porter.dc.luth.se> <3E95E446.73B7E510@mindspring.com> <3E95E8E9.3080102@ludd.luth.se>
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Mattias Pantzare wrote: > > The products that Jeffrey Hsu and I and Alfred and Jon Mini > > worked on at a previous company had no problems at all on a > > 1Gbit/S saturating the link, even through a VLAN trunk through > > Cisco and one other less intelligent switch (i.e. two switches > > and a VLAN trunk). > > A key factor here is that the testst where on a link with a 20ms > round-tip time, and using a singel TCP connection. So the switches > where in addition to a few routers on a 10Gbit/s network. Sorry, but tis is not a factor. If you think it is, then you are running with badly tuned send and receive maximum window sizes. Latency = pool retention time = queue size -- Terry
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