Thanks for Jeff nice reply which lead me know clear about that issue. 2010/3/7 Jeff Epler <jep...@unpythonic.net>
> Emc works properly on 64-bit and SMP systems. I routinely use and > develop emc on such a system with --enable-simulator (no realtime, no > hardware control). > > For realtime hardware control, emc depends on the underlying realtime > system (rtai). In 2007 I did a bit of work in this area, as detailed on > my blog > http://emergent.unpy.net/01180573281 > http://emergent.unpy.net/01181319466 > but I don't use a 64-bit or SMP kernel on the PC that controls my mill. > > Emc doesn't really derive any specific benefits from these systems; it > doesn't need large address spaces, and its CPU usage isn't particularly > high, at least in systems with no base_thread where you're not running a > resource-hungry GUI. Smart I/O boards like pico and mesa, and realtime- > friendly accelerated opengl (if you want to run axis) would be much > bigger contributors to a responsive system than SMP would be. > > Ultimately, it's the time to build and test each new platform that keeps > us from offering pre-built packages for every system our users would > like. Building the kernel and rtai are usually more time-consuming than > building emc itself. That leads us to build for a very small number of > operating system releases, and to build with conservative options that > we judge will work on the greatest number of machines. With the next > release we'll probably look at enabling SMP; we know that this will > restrict rtai to working only on systems with APIC, but in 2010 it's > probably only a small minority of machines that don't have APIC. If > testing proves us wrong, we'll take it out and remain restricted to > using a single CPU or core. In another few years, maybe we'll be in a > position to make a similar decision about 64 bits as the standard that > will work on all but a few uninteresting machines. > > Jeff > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
