tso4 not working with bge

[Martti Kuparinen <martti.kuparinen%iki.fi@localhost>]

Hi,

Is "ifconfig bge0 tso4" supposed work with bge interfaces?

I tested it on our NetBSD/amd64 5.0_BETA server (Dell PowerEdge T300) and TCP 
throughput dropped from 700+ Mbps to 2 kBps.

bge0 at pci10 dev 0 function 0: Broadcom BCM5722 Gigabit Ethernet
bge0: interrupting at ioapic0 pin 16
bge0: ASIC BCM5755 C0 (0xa200), Ethernet address 00:1e:c9:f3:63:39
bge0: setting short Tx thresholds
ukphy0 at bge0 phy 1: Generic IEEE 802.3u media interface


backup:~> ifconfig bge0
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

capabilities=3f80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx>

enabled=3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx>
        address: 00:1e:c9:f3:63:39
        media: Ethernet autoselect (1000baseT full-duplex)
        status: active


Martti