Re: network slowdown?

From: Howard Chu
Date: Wed Jul 27 2005 - 14:44:22 EST

Stephen Hemminger wrote:
On Wed, 27 Jul 2005 01:44:43 -0700
Howard Chu <hyc@xxxxxxxxxxxxxxx> wrote:
I just recently compiled the 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 kernel had driver version 6.23. I just downloaded the current driver from (8.23) and installed it and now things are much improved, getting around 6.8MB/sec throughput.

-- Howard Chu
Chief Architect, Symas Corp.
Director, Highland Sun
OpenLDAP Core Team
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