Brian Ford wrote: > Hi Everyone, > > I'm new to real time linux programming, apologies if these questions are > very simple. > > I've recently setup a real time Linux kernel using patch-2.6.24.7-rt26 > and got the simple "Hello World" program working. However, I'm unable > to find any guides on how to write more complex software. > > Can you tell me how to do real time inter process message passing in linux? > I'm familiar with shared memory and pipes -- is it ok to use these in > a real time context? > > Also, I've read that printf may not provide real time performance. > (http://rt.wiki.kernel.org/index.php/HOWTO:_Build_an_RT-application) > If I use printf/printk to a X UI terminal, will the output be deterministic (take a fixed time)? > > I'm also interested in building a cyclic executive scheduler to control individual process. At > the moment I'm guessing the only way to do this would be to modify the kernel scheduler. > Is it possible to do this at the application/process level? It depends. Do you know about SCHED_FIFO and SCHED_RR ? It sounds like that may already suit your needs. If you're not familiar with those, please read up on this - e.g. in Chapter 4 of Robert Love's book: http://www.amazon.co.uk/dp/0672327201 -- Best regards, Klaas van Gend Senior Solutions & Services Architect MontaVista Software Phone: (408) 572 7962 (Santa Clara Office) Phone: +31 40 2801386 (for European calls) -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
