Kai Moritz wrote:
Hi folks,
Oh, yes, there is something one have to know when trying to run ORTE
over RTnet (which is, AFAIK, undocumented yet): due to the old-style
kernel design of the ORTE port over RTAI/RTnet (mea culpa),
initialisation of sockets takes place in real-time context. This means
that the required buffers of that sockets need to be obtained from the
global real-time rtskb cache - which is empty by default. Increase it by
passing e.g. "rtskb_cache_size=64" during insmod rtnet.ko (or patch the
rtnet start script). See also README.pools.
Yeah, thanks! That helps.
After increasing the size of the rtskb_cache orte and ortemanager are
loaded without any errors!
Unfortunatly, I stumbled in some new problems directly afterwards. I
wanted to test my ORTE-compilation by inserting the h_publisher_rt.ko
module from ORTE's hello-world example. But when I load that module, I
get the following message from RTAI:
----------------------
Default Trap Handler: vector 14: Suspend RT task c5d34040
----------------------
I've used Google to search for the string "rtai vector 14" and found a
mail-thread that says, "vector 14" is indicating a page fault.
Then I've inserted some simple rt_printk debug-statements in the code.
So I was able to track the error down to a function called
ORTEDomainCreate(). This function is rather long so it's to
timeconsuming to insert more rt_printk debug-statements for further
research. (Perhaps I will try to use kerneldebugging for that...)
At the beginning of the function some memory is allocated. But that
doese not trigger the rtai-trap.
Strangely enough, the same function is called without any errors before,
when the ortemanager_rt.ko module (which initializes the ORTE-System) is
loaded!
Id it right, that "vector 14" indicates a page-fault?
Which functions can trigger that rtai trap??
Besides these issues with setting up and running ORTE 0.3 over latest
RTnet (which is likely easy to fix),
Since we need ORTE I would like to try to fix the errors stated above.
But unfortunatly I'm absolutly new to rtai and RTnet. Though, it is very
hard for me, to figure out, what is going wrong. I think I need some -
or better: much - more time to play around with rtai and RTnet to fully
understand the fundamentals...
kai
-------------------------------------------------------
This SF.Net email is sponsored by:
Power Architecture Resource Center: Free content, downloads, discussions,
and more. http://solutions.newsforge.com/ibmarch.tmpl
_______________________________________________
RTnet-users mailing list
RTnet-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/rtnet-users
