Code profiling in Contiki?

Hi folks. We'd like to do some code profiling of various algorithms 
(signal analysis, routing, etc) in Contiki, on Tmote-sky hardware. Is 
there a known way to do this, using any of the existing profiling 
methods & packages? (gprof, valgrind, etc). The most honest way I can 
think of doing this would be to attach a debugger to an actual mote, and 
periodically trap a running program to determine where it is current 
executing.

Any advice on this would be appreciated, as I'm not that familiar with 
performance analysis methods & tools.

Thanks,
Andrew Pullin
Berkeley Manufacturing Institute

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Timer set

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Packet sizes

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Re: Packet sizes

Hi Berta,

The maximum size depends on which platform you use.
On the TmoteSky with CC2420 the current radio driver uses 2 bytes CRC 
overhead (+ 1 byte length).
The maximum packet payload size is hence 128 - 3 = 125 bytes.

Rime overhead is minimum 2 bytes (anonymous broadcast only adds 16-bit 
channel information). Each additional Rime layer adds a few bytes.

/ Fredrik

Berta Carballido wrote:
>
> Hi all,
>
> I am writing to you to ask which is the maximum PSDU size in Contiki 
> (is 127 bytes?).
>
> And, as in those bytes Rime and MAC headers should be included, which 
> is the maximum number of data bytes that can be sent per packet? (or 
> in other words> how long are the Rime and MAC headers?)
>
> Thanks a lot,
> Berta.
>
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>
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Re: Porting to the Renesas H8S...

On Thu, 28 Feb 2008 15:41:54 -0500, Adam Dunkels <adam@...> wrote:

> Start by looking at the native port. It includes the basic stuff that is
> needed: boot-up code and the timer. There are also a set of slides
> available on the Contiki website - which currently seems to be
> impossible to reach :(
>
> /adam

...any opportunity to locate the mentioned slides?

Take Care.

Rob!

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Re: Packet sizes

Thanks for that :),

Could you please tell me if I am right?

For the collect protocol:

collect.c (6 bytes of header)
ruc.c (2 bytes)
suc.c (0 bytes)
uc.c (2 bytes)
ibc.c (2 bytes)
abc.c (2 bytes)

Thanks again,
Berta.

-----Original Message-----
From: contiki-developers-bounces@... on behalf
of Fredrik Österlind
Sent: Tue 3/4/2008 10:59 AM
To: Contiki developer mailing list
Subject: Re: [Contiki-developers] Packet sizes

Hi Berta,

The maximum size depends on which platform you use.
On the TmoteSky with CC2420 the current radio driver uses 2 bytes CRC 
overhead (+ 1 byte length).
The maximum packet payload size is hence 128 - 3 = 125 bytes.

Rime overhead is minimum 2 bytes (anonymous broadcast only adds 16-bit 
channel information). Each additional Rime layer adds a few bytes.

/ Fredrik

Berta Carballido wrote:
>
> Hi all,
>
> I am writing to you to ask which is the maximum PSDU size in Contiki 
> (is 127 bytes?).
>
> And, as in those bytes Rime and MAC headers should be included, which 
> is the maximum number of data bytes that can be sent per packet? (or 
> in other words> how long are the Rime and MAC headers?)
>
> Thanks a lot,
> Berta.
>
> ------------------------------------------------------------------------
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> ------------------------------------------------------------------------
>
> _______________________________________________
> Contiki-developers mailing list
> Contiki-developers@...
> https://lists.sourceforge.net/lists/listinfo/contiki-developers
>   

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rtimer?

Hi,

some questions about rtimer:

- are rtimers a fully functional contiki module?
   In rtimer.h the documentation of rtimer_set() refers
   to RTIMER_TASK which is nowhere else defined.

- parameter duration of rtimer_set() is not used

- also the limitation that only one rtimer task may
   be scheduled at a certain time is not very
   reasonable (TMO).

- Adam also mentioned in some earlier post 
(http://sourceforge.net/mailarchive/message.php?msg_name=477FE91C.8060405%40sics.se)
   an upcoming revision of the real-time timer subsystem.
   Any more information on that?

Hardy

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codeprop error

Hi,
Im doing some tests on tmotes using the platform sky. Im programming one 
mote with make gateway.u and another with make client.u
Then I run tunslip and ping the client without any problem.
Afterwards I compile the blink example with make blink.ce and send it 
with codeprop to the client:
~/wsn/contiki-2.x/tools$ ./codeprop 172.16.0.9  
~/wsn/contiki-2.x/examples/sky/blink.ce
This is my output:
File successfully sent (1024 bytes)
Reply: err 7 u
OK                  0
BAD_HEADER          1
NO_SYMTAB           2
NO_STRTAB           3
NO_TEXT             4
UNDEFINED           5
UNKNOWN_SEGMENT     6
NO_STARTPOINT       7
TEXT_TO_LARGE       8
DATA_TO_LARGE       9
UNKNOWN_RELOC      10
MULTIPLY_DEFINED   11

Is there something i need to change?

Alex

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Non cyclic thread

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Re: Porting to the Renesas H8S...

They are on the website under the link "Publications and Documentation" 
to the left. I cannot check if they are accesible right now (sitting on 
an airplane over Germany right now :)) but they *should* be there.

/adam

Rob Wehrli wrote:
> On Thu, 28 Feb 2008 15:41:54 -0500, Adam Dunkels <adam@...> wrote:
> 
>> Start by looking at the native port. It includes the basic stuff that is
>> needed: boot-up code and the timer. There are also a set of slides
>> available on the Contiki website - which currently seems to be
>> impossible to reach :(
>>
>> /adam
> 
> ...any opportunity to locate the mentioned slides?
> 
> 
> Take Care.
> 
> Rob!
> 
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> Defy all challenges. Microsoft(R) Visual Studio 2008.
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> 

--

-- 
Adam Dunkels <adam@...>
http://www.sics.se/~adam/

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