[ns] Real Time Clock falling behind

[shailesh sheoran <shailesh@ece.ubc.ca>]

Hi ,
 I really really need some help. My thesis seems to be going down a drain.
I am trying to build a link layer in emulation mode. As a result I had to
write retransmission and packet storage modules in my ll.cc and tap.cc.
Now for some reason the throughput of my Link Layer is extremely extremely
low. I am tracing the fall back in the clock and at times the total fall
back can reach upto greater than 10 seconds for a 20 second simulation.
i.e if i add up all the total 'fallback' time according to the following
warning:
RealTimeScheduler: warning: slop %f exceeded limit %f [now:%f, clock_:%f\n
from the scheduler.cc file.

	I don't know what the problem is. And i can't find anything in the
archives. I really need help here.
	Is it because of too much processing?
	Could it have something to do with the rwait() loop?
	Or could it be that my clock is just not updated, i don't know
please any suggestions, any.
regards,
Shailesh Sheoran
M.ASc.
Department of Electrical Engineering
University of British Columbia