task control block and stack size question...

[andrews@njsurfnet.net]

I need some help!

We've inherited an Ada project that uses tasking and I have a question on
where they could have come up with some numbers they used (none of the
original authors are with the company anymore). The main task type uses a
representation clause as follows:

   task type SERVER_TASK_TYPE is
      entry Initiate ( Socket : CASS_Sockets.Socket_Descriptor );
      entry Interrupt;
   end SERVER_TASK_TYPE;
   for SERVER_TASK_TYPE'storage_size use 3600 + ( 64 * 1024);
       --                    Task_Control_Block + ( Stack_Size )

Does anybody have any idea about how one comes up with the numbers for the
task control block and the stack size? The code is running on a Sun SPARC
20 (Solaris 2.5.1) built by the Sun SPARCWorks Ada 2.1.1 compiler (VADS
single threaded RTS). We have a server sending and receiving messages of a
perticular size, and when we jack up that size, the server seems to hang.
After jacking the 64 * 1024 to 256 * 1024, it seems to work for a few API
calls, but then hangs. I need more info about where these numbers came
from! Any ideas?

Thanks ALL!

Pete Andrews

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