On 5/17/2012 4:18 PM, gene heskett wrote: > On Thursday, May 17, 2012 03:56:00 PM andy pugh did opine: > >> On 17 May 2012 14:33, Jan de Kruyf<[email protected]> wrote: >>> Andy >>> Until we do proper tests: see the OSADL numbers for the various board >>> / cpu setups >> The Core2Duo system they have looks like it would software-step >> perfectly adequately >> https://www.osadl.org/Latency-plot-of-system-in-rack-1-slot.qa-latencypl >> ot-r1s2.0.html >> >> Some of the other systems look decidedly poor, which is a shame >> because what LinuxCNC really needs is a reliable works-on-any-system >> RT layer. > Looking at some of the other results, I am amazed at the generally poor > performance of the ARM's in general. > > 25 years ago, looking for the reason I could literally spend days trying to > download some of the early programs for the TRS-80 Color Computer. which at > that point had a motorola MC68A09EP in it for a cpu, running at .889 mhz. > <...> > > Then that once a minute ghost trace disappeared and I could download major > sized bits of programming without rzsz ever detecting or needing to correct > an error. > > The point being, that if a processor that runs at .889 mhz can do it in 15 > microseconds, why can't a modern cpu running at 2000 times the 6809's > speed, do it in 7.5 nanoseconds? Somethings wrong with this picture. > > Cheers, Gene Oh, please, stop before you get me started reminiscing about Z80 cards stuck into my homebrew Apple II :-) Seeing rzsz in print was a bit of a shock.
I seem to remember posting a rant to the emc-users list a year or more ago lamenting this "progress" toward cpus and graphics chips optimized for multimedia and/or games to the exclusion of everything else. I suspect the line managers are like a boss I once had, always ready to jump to the next bandwagon and absolutely incapable of admitting they've given something up in the process. It's hard to argue with them raking in the big bucks. A friend of mine clued me into a psychological/sociological phenomenon known as "shifting baseline." With a little massaging, I think it could be used to explain our current circumstance. Regards, Kent ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
