Mark, > I was thinking more of hardware resources, such as interrupts. What > happens when both instances require the same interrupt at the same time?
Any instance usually will have a HAL driver to talk to the outside world exactly like the single instance which we have now, and that driver will attach to a hardware device and will be responsible to allocate all required resources during startup or bark if isnt possible - there is no difference at all from a single instance which loads several drivers talking to different devices this would include an interrupt if there were one - you probably wont find any in LinuxCNC > Unlike shared memory, interrupts are a bit harder to share, or have > concurrent use. Can the separate instances somehow share the IO bus? no, separation is at the HAL driver level as it always was, no new concepts here an example: assume you have 2 parports in a PC: it is exactly the same I/O usage if you do this in a single instance: loadrt hal_parport cfg="0x278 0x378" or do this in instance #1 loadrt hal_parport cfg="0x278" and this in instance #2: loadrt hal_parport cfg="0x378" Remember: instances are ships in the night _except_ if there are cross-linked signals, in which case they can share signal values you're thinking too complicated ;) - Michael > Or > is there some kind of real time scheduler that looks ahead for all possible > conflicts, and works it out? > > Mark > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
