[Click] some outputs from peak rate measurement, and questions

[Lan Xue]

Hi all,

Thanks for those who give me suggestions about measuring the peak packet 
forwarding rates. The click router is installed on a PentiumIII machine 
with 1.2GHz CPU and 1G memory. Because the for now, the 100Mb network 
adapters are the bottleneck, I instead use InifiteSource as traffic 
generator and Counter to collect the number of packets passed. Kernel 
space 
provides around 1.1M packets per sec, about twice as much as that provided 
by user level click.

I tried 64Byte, 1kByte and 10KByte packet, but didn't observe any obvious 
difference in forwarding rates between different packet sizes. Does that 
imply that there's no upper bound for the number of bits passed through 
the router per sec, given the number of the packets are not higher than 
the peak rate?

Next are the handlers printed out by PokeHandlers, running at user-level. 
It was called in this way: PokeHandlers(read ctr.rate, read ctr.count, 
read ctr.byte_count, read myqueue.drops, write ctr.reset, wait 1, loop); I 
assumed that ctr.count should be close to ctr.rate if not exactly the 
same, since there's no drops of packets from the queue. Also, I thought 
ctr.count should be the product of ctr.byte_count and size in byte per 
packet. However, neither is the case as I expected, as you can see from 
below: 

ctr.rate:
518795.996

ctr.count:
743040

ctr.byte_count:
40867200

myqueue.drops:
0
    
... more repeated prints, but with similar values as the above for each 
handler.

Anyone has any ideas/comments/suggestions? 

Thanks a lot,

Lan