Re: Slow transmission with Marvell SKnet

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Frank Wille <frank%phoenix.owl.de@localhost> wrote:
>I think we have a problem in the sk(4) driver for Marvell Yukon SK-Net.
>Probably since ever. But I didn't notice it before I made one of my sk(4)
>based Synology NAS into a media server.

[snip]

>While the receive-speed is quite constant, the transmit-speed varies a lot,
>depending on the machine and NIC on the other end of the FTP connection.
>For example I have seen less than 50 KiB/s on a iBook G4 (NetBSD/macppc)
>with gem(4), where the rate quickly oscillates between 20 and 200 KiB/s
>during the transmission.

Sounds to me like a PHY negotiation problem on the other end of the
link.

Have you tried testing with a crossover cable between the test machines
and no switch ?