On Sat, Feb 08, 2003 at 11:55:00 +0100, David Olofson wrote: > On Saturday 08 February 2003 13.17, Steve Harris wrote: > [...brachless clamp...] > > Its not an instruction its just a bit of maths using fabs(). > > Yes, of course! I keep forgetting that fabs() is an FPU operation. :-) > (Life's not that nice with ints on most CPUs...)
Its not even an FPU op if you turn of the gcc optimisations, its just a bitmask. > If you want to make sure you *cannot* overload the CPU with the > current net, just have the host test it by turning all silent buffers > into cleared non-silent buffers. > > Varying CPU load is not a problem in RT systems, but non-determinism > is. They may look confusingly similar from a practical POV, but > they're different things. I suspect (but have no intention of finding out) that suddenly waking up a large subnet will have large chace effects too, so it wont be a case of just the CPU load varying. - Steve
