The answer is "it depends". What kind of real-time constraints do you have in your application? Moreover, what is the quantity of live data? Can you get by with statically allocated data structures or is all allocated dynamically?
I haven't gotten started yet, and I don't have any experience with real time development, so I'm not sure what the constraints are. Ultimately I'd like to replace the Internet and phone system with a global P2P network, which also uses a P2P money system to pay nodes for cooperation. Long distance links might require hundreds or thousands of hops. For this to succeed, the latency at each hop needs to be minimized to the bare minimum. I want to try to do this using standard PCs converted to single purpose routers with a Linux boot CD. Slashdot had a discussion awhile back about Linux having real time capabilities built into the kernel starting from version 2.6.18
http://linux.slashdot.org/article.pl?sid=06/10/14/2132244
So I guess I'd like to write my application to perform on par with the capabilities of the Linux kernel - not to introduce any significant delays beyond what the kernel does.
I think it would be possible to write it using statically allocated data structures. Since the boot CD would use the computer as a single purpose machine, I could just take all the memory available and manage it myself rather than using the OS to allocate or deallocate.
Thank you for the offer of old code. At this point I don't know Lisp or Scheme yet - I'm just starting to learn. Just trying to get an idea if this language could do what I want, or if I'll have to use C.
Vincent
Does it have a real time garbage collector?
Not the standard release, but I could dig up some old code that we did use for research if you want to experiment (http:// www.iro.umontreal.ca/~feeley/papers/ismm98.ps.gz).
Marc
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