new polling driver and ToDevice

[Ryan Menezes]

Hi Eddie,

I got a chance to play around with the new e1000 polling driver. A few
discrepancies to report.

1)I get messages like "ToDevice rejected a packet" even at very low packet
rates: 1000packets per second of 64 bytes each on a Fast Ethernet LAN.
I am using 2 Intel Pro 1000/T copper GigE cards. The configuration looks
like this

Adtech AX/4000->Cisco 3550 -> (eth0)Linux (eth1)->Cisco3550 ->AdtechAX/4000

The click file is a simple
PollDevice(eth0)->Queue->Counter->ToDevice(eth1);

Using the AX/4000 I can accurately get a count of sent and received
packets/rates/delays etc. A few packets seem to be missing on the RX side
and their percentage increases as sending rate is increased.
The ToDevice stats show that no packets have been dropped however some of
these packets are never received by the AX/4000. Any idea why this might
be happening ?

2)I tried to play around with the TxDescriptors for e1000 during insmod and
then ran click (same config as above). When the packet generator was
started, Linux went into Kernel Panic and  required a hard reboot.


Thanks,
Ryan