On Friday 25 October 2013 12:57:08 Sven Wesley did opine: > 2013/10/25 Jon Elson <[email protected]> > > > Dave Cole wrote: > > > I noticed on Intels website that the new Atom chipsets that are > > > replacing the Cedarview chipsets do not support hyperthreading. > > > > Hyperthreading was a really dumb way to get around some MicroSoft OS's > > really BAD task scheduler. it would let one process monopolize the > > system badly. Hyperthreading was pretty easy to do, mostly add an > > extra register set, but it had a lot of bad side effects, like twice > > the instructions stream > > loading the cache, and diluting the cache benefits for a single > > process. MUCH > > better to let a single process run for a few ms and then task switch. > > Hyperthreading > > just splits the one CPU in half, so to speak. > > > > Now, of course, everything is going to multiple REAL CPUs (rather than > > virtual CPUs by hyperthreading) but the cache sizes are becoming huge. > > memory buses are also getting faster. > > > > Jon > > Another thing that increases performance is to not use the closed source > graphics drivers, they causes really bad hick ups. > > /S
I can testify that loading the average nvidia driver will make your 3u-s latency figures into 300 milliseconds. So while the nvidia board are generally ok, avoid their drivers like the plague or smallpox. I've an nvidia GForce 6200 in this machine, running the nouveau driver, and that works relatively well as a remote terminal when logging into the real machine with an ssh -Y login. But that card is gradually dying, and when I can get to it on this bad knee, it will be replaced with an EVGA 8400, uses the same driver as its a GForce 8xx, costs about a $30 bill. > ------------------------------------------------------------------------ > ------ October Webinars: Code for Performance > Free Intel webinars can help you accelerate application performance. > Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most > from the latest Intel processors and coprocessors. See abstracts and > register > > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.cl > ktrk _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) In the first place, God made idiots; this was for practice; then he made school boards. -- Mark Twain A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
