Questions on Click

[Eddie Kohler]

Hi Lakshmi,

The difference between Click with and without polling is pretty huge -- a
factor of 5 or more. You can see this in graphs from our TOCS paper
(available at pdos.lcs.mit.edu/click ). The Click interrupting performance
is about the same as Linux's performance with interrupts.

> 1. The FromDevice and ToDevice routines do not seem to sending packets all
> the time. We started a flow from a traffic generator of very low bandwidth
> to the Click router and the traffic generator seems to have sent the
> packet but the Click does not receive it in kernel mode. The fromdevice
> routine does not seem to work. However we could receive the packet in
> user mode. We are running Click on top of Linux 2.2.17
> We are facing similar problems with ToDevice routine. it does not send
> packets from Click.

We don't use FromDevice very much any more, so it is possible that the code
is not working properly. But it would surprise me. Could you send us the
actual configurations yoiu used? Or have you worked on this problem since
writing this email, pinned down the problem more, and that was the other
email you sent?

Thanks
Eddie Kohler
Click people