[Tinyos-devel] FTSP testing result

Omprakash Gnawali gnawali at usc.edu
Wed Feb 4 11:00:25 PST 2009


I can certainly try Motelab but waiting for the fixes to be patched in...

- om_p

On Tue, Feb 3, 2009 at 5:23 PM, Matt Welsh <mdw at eecs.harvard.edu> wrote:
> Can you try on Motelab?
>
> On Feb 3, 2009, at 2:18 AM, Omprakash Gnawali wrote:
>
>> 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
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>
>


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