Urs Hunkeler wrote:
Hi Anu,
TOSSIM in TOS 2.x has specifically been written to be more efficient.
You probably notice a difference especially when you interact with the
TOS 1.x simulation with a java-based application, such as TinyViz.
I don't think there would me much of a difference on real hardware.
Cheers,
Urs
Anu Singh schrieb:
Hi All,
Is there is a considerable performance difference between TinyOS-1 and
TinyOS-2? I am doing simulation using TOSSIM for a program (encodes a
message passing iterative algorithm among network nodes). I wrote the logic
of the program in nesC for both TinyOS-1 and TinyOS-2. When I simulated
the programs using TOSSIM for TinyOS-1 and TinyOS-2 (both running under
similar machine settings) I observed that for simulating same number of
iterations of the program it takes considerably longer in TinyOS-1 than in
TinyOS-2. For example, for 40 iterations (200 virtual seconds) of the
program for 25 nodes it took 6 seconds in TinyOS-2, and 125 seconds in
TinyOS-1. And when I simulated the program for 1000 iterations (5000
virtual seconds) for 25 nodes it took 28 seconds in TinyOS-2, and 51
minutes in TinyOS-1.
I am new to TinyOS. Is this difference in simulations times between TinyOS-1
and TinyOS-2 usual? What are the possible reasons for it?
I have a few more questions:
1. How long is message transmission time between two connected nodes (link
gain 0.0) in TinyOS (TOSSIM).
2. The '-l' option while running TOSSIM for tinyos-1 doesn't allow scaling
more than approximately 1.5 times (that is simulate 1.5 virtual seconds in 1
real second). Can the scaling factor be increased beyong 1.5 to reduce real
simulation time.
Thanks,
-Anu
____
There's a tech report that cross-evaluates them:
http://sing.stanford.edu/pubs/tinyos2-tr.pdf
Phil
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