[okl4-developer] [camkes] deadlock within a basic hello world example....

[Hugues Balp]

    Thanks for the first release of the camkes tool.

After having tested the release through the tutorial examples, I have 
written some
other examples just a little different from the one you have provided in 
order to test
the runtime behavior.

The first one named "hello5" seems to be not multi-thread safe whereas 
the second one named "hello6" fails
 with some kind of deadlock that I don't better understand....

As illustrated with the figure below and the related hello5.camkes and 
hello6.camkes files provided within the
joined archives  the only difference between both examples is an 
additionnal connection "hello" in example "hello6".

                                                                                                   

   ----------------               ----------------             
----------------            ----------------
   |              |               |              |   world     
|              |            |              |
   |   "hello"    |  helloworld   |   "hello"    |----(  O-----|   
"world"    | helloworld |   "world"    |
   |  <control>   |----(  O-------|              |             
|              |----O )-----|  <control>   |
   | HelloWorld-  |               |    Hello-    |     \  /    |    
World-    |            | HelloWorld-  |
   |   Client     |               |   Component  |----O \)-----|   
Component  |            |   Client     |
   |              |               |              |   hello     
|              |            |              |
   ----------------               ----------------     /  \    
----------------            ----------------
                                                          
As illustrated by the joined logs the resulting behavior leads to some 
inconsistencies for the hello5 example 
and to a deadlock case for the hello6 example tested with skyeye for the 
gumstix platform.

Here are the build and test command I use:

     tools/build.py machine=gumstix project=iguana mutex_type=kernel 
apps=hello5 simulate

     tools/build.py machine=gumstix project=iguana mutex_type=kernel 
apps=hello6 simulate

Logs are provided in files hello5.log.tgz and hello6.log.tgz...

I am not sure if those bugs are only related to my examples or to 
camkes....

I would appreciate any help on those examples.

    Best regards,

                   Hugues Balp.


                                                      
                                 

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