Re: [Contiki-developers] network performance

[Adam D. <ad...@si...>]

There is a shell command called sendtest that can be used. You should be 
able to do something like this:

Edit the file examples/sky-shell/sky-shell.c

Add the line

shell_sendtest_init();

among the other *_init(); calls. You will probably need to comment out 
some of the other _init()s to make the whole thing fit into memory (e.g. 
remove shell_sky_init()).

Connect two motes to your pc, then upload the code as usual:

make sky-shell.upload

Login to one of them:

make login MOTE=1

then do:

sendtest x.y 1000 100

where x.y is the node ID of the other one (obtain with 'make login 
MOTE=2' and press return).

Fiddle with the sendtest parameters to get different results. Note that 
the throughput data you get are when the data is sent over the default 
power-saving MAC protocol X-MAC and are therefore unexpectedly low. I 
just added a printout to the sendtest command that prints out the radio 
duty cycle too, to highlight this tradeoff, so update the CVS before you 
go this.

To try the different power-saving MAC options, do this:

make clean
make DEFINES=MAC_DRIVER=lpp_driver sky-shell.upload
echo "sendtest x.y 1000 100" | make login MOTE=1

make clean
make DEFINES=MAC_DRIVER=nullmac_driver sky-shell.upload
echo "sendtest x.y 1000 100" | make login MOTE=1

and you should see quite a bit of difference in throughput as well as in 
the radio duty cycle with the different MAC protocols.

/adam

Melanie Schranz wrote:
> Hello everybody!
> 
> I just want to measure the network performance of a network consisting 
> of 2 Tmote Sky motes.
> What can I use?
> It is urgent!!
> 
> Thanks in advance
> Melanie
> 
> 
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-- 
Adam Dunkels <ad...@si...>, +46707731614
http://twitter.com/adunk | http://www.sics.se/~adam/