[Tinyos-devel] FTSP testing result

[Omprakash Gnawali]

I ran FTSP for a few hours on Tutornet and the result is not good. The
nodes go out-of-sync frequently enough to make the system unusable.

Setup: I updated my tos directory from CVS head earlier today. I
changed tests/TestFtsp to log FTSP time every 10s. 56 nodes total.
"PFLAGS += -DTIMESYNC_RATE=30" added to the Makefile.

Here are some results:
http://enl.usc.edu/~om_p/net2/ftsp/

Every 10s, for each node, I plot a point on the first graph if the
getGlobalTime() returns a FAIL indicating unavailability of global
time. If there are no dots on the graph, it would mean the nodes have
a valid global time at all times.

With Trickle timer, the results are worse, but maybe we should fix the
periodic case before we get to Trickle. Turns out the
consistency/PULL-bit is more complex than I had thought but it should
be doable.

- om_p