On Mar 28, 2013 2:58 PM, "bjørn" <bj...@spesmek.no> wrote: > > snip > /"I keep mulling over this "5-6 hours" observation. I know we recommend > running the latency test for a long time but I don't think we understand > why these spiking events show up rarely. It's all well and good to blame > power saving features in modern CPUs but they are functioning over much > smaller time scales. If they are involved in 5-6 hour spikes, then it > would seem we're experiencing some sort of "perfect storm" phenomenon."/ > > You are probably right, this happens after to long a time, and not the > same each time either. But i am still suspicious to the blank screen. > All screensaver functions are already set to "never" thats a bit of a > mystery
If it's an LCD monitor, perhaps it has to do with two way handshaking between the monitor and the unix box. Is there a power save mode built into the monitor itself? Anything special about the monitor? As an aside, turn off (in BIOS) any ports you do not need. I've seen Dell desktops get good latency figures over 24 hour testing with unused ports disabled. Those hosts used Mesa cards instead of the parallel ports. If I recall correctly, the rs232 serial ports were disabled as well. I'll be putting one of them into service on my first retrofit soonish. If there was interest I could test disabling the ports separately. Best, Jason ------------------------------------------------------------------------------ Own the Future-Intel(R) Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://altfarm.mediaplex.com/ad/ck/12124-176961-30367-2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
