Re: 2.6.12.3 network slowdown?

[Howard Chu <hyc@highlandsun.com>]

Stephen Hemminger wrote:
> On Wed, 27 Jul 2005 01:44:43 -0700
> Howard Chu <hyc@highlandsun.com> wrote:
> > I just recently compiled the 2.6.12.3 kernel for my x86_64 machine
> > (Asus A8V motherboard); was previously running a SuSE-compiled 2.6.8
> > kernel (SuSE 9.2 distro). I'm now seeing extremely slow throughput on
> > the onboard Yukon (Marvell) ethernet interface, but only in certain
> > conditions. Going back to the 2.6.8 kernel shows no slowdown.

> There a couple of possibilities, one is driver differences. SUSE ships
> the SysKonnect vendor driver vs the older version in 2.6.12, and the
> TCP congestion and TSO code has changed since 2.6.8.

Thanks for that tip. The SuSE 2.6.8 kernel had driver version 7.04, the 
2.6.12.3 kernel had driver version 6.23. I just downloaded the current 
driver from www.syskonnect.de (8.23) and installed it and now things are 
much improved, getting around 6.8MB/sec throughput.

--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/
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