charles green wrote: > cnczone - ive seen that before somehow. > > the task manager of winxp has a process priority setting, with one of the > choices being 'realtime'. never tried it for anything. but the realtime > mode of operation in linux is still a general hardware timeshare approach, > no? ..including stuff like keyboard and mouse. i remember the original > macintosh computers could still do the mouse pointer on the screen as long as > the ics on the motherboard were not dead. that's what i imagine realtime to > be ideally. > Well, it is a general timesharing approach, but with priorities. The real time scheduler takes priority over Linux, and the real time tasks are always run when THEY need to run, and then Linux tasks can have what time is left. There is a latency test program that evaluates how good (or bad) any particular computer is in this regard. We have a Wiki page with reports of latency performance of a variety of computers, and sometimes with different settings on those same computers. keyboard and mouse interrupts take less than a microsecond on modern hardware, so they pretty much disappear. The $79 Intel D525MW motherboard has latency figures of as low as 3 us, which is remarkably good.
The original Mac mouse pointer was probably handled completely in hardware. Not a great help if the OS crashed. Jon ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
