Hello Nivedita, Thanks for your answer. > What are your criteria? Do you care about anything other > than performance (availability, upgrades, cost, support, > compatibility, tools, ...)? > > (...) you're best off testing the solutions that you can > get hold of with your own workload, in your own environment. > Performance is a must. Besides, costs and tools are very important. Support is also important, but I guess I'd find some good support for any of the solutions. My new CPU has an Intel Atom N270 @1.6 GHz processor. At the moment (during the porting it might be optimized), I have 5 drivers requering hard real-time (no loop can be skipped) and being called every 2 to 10 ms. In fact, at the beginning I was using 1 ms, but I had some problems with the hard real-time and changed the timing to 2 ms. I do not consider using a legacy OS emulation. I know my final decission will have to be made after some real tests on my own system, but at this moment I'm trying to gather as much information as I can, regarding the pros and cons of each solution. > Also, fwiw, there are 2 enterprise distros (Red Hat's MRG > and Novell's SLERT) providing real-time (both based on the > Linux RT patchset). > Thank you very much. I'll have a look at them. Best regards, Asier. > -----Original Message----- > From: Nivedita Singhvi [mailto:niv@xxxxxxxxxx] > Sent: Tuesday, May 11, 2010 5:21 PM > To: Asier Tamayo > Cc: linux-rt-users@xxxxxxxxxxxxxxx > Subject: Re: PREEMPT_RT patch vs RTAI/Xenomai > > > Asier Tamayo wrote: > > Hello all: > > > > I'm just a newbie to this list, so just forgive me if my > question is obvious or has been answered many times ;-) > > > > I want to do a port from an old system running a > proprietary RTOS to a new one based in Linux. My system runs > many applications at the same time (GUI, parsers, ...), a few > of which are hard real-time. > > > > I've searched the web, but am still unable to decide which > system to use: RTAI, Xenomai or the PREEMPT_RT patch. Can > anyone give me some clue in this issue? Are there any > advantages in choosing the PREEMPT_RT patches over Xenomai or > RTAI? Running the GUI, which demands a lot of CPU and RAM, > can have any effect on the real-time behaviour? > > > > I've seen many comparisons, but in this fast-changing > world, most of them seem to me to be quite out of date. > > > > Any hint will be really helpful, > > What are your criteria? Do you care about anything other > than performance (availability, upgrades, cost, support, > compatibility, tools, ...)? > > If your most important criteria is how well your applications > perform (whatever that means for you), you're best off testing > the solutions that you can get hold of with your own workload, > in your own environment. > > Also, fwiw, there are 2 enterprise distros (Red Hat's MRG > and Novell's SLERT) providing real-time (both based on the > Linux RT patchset). > > thanks, > Nivedita > -- 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
