On 02/23/2013 01:54 AM, Michael Haberler wrote: >> Hi Fritz, >> >> thanks for the data point! >> >> It confirms my theory that undeterministic recovery times from powersave >> states are a major (if not the) primary source of latency, and that factor >> is largely operating-system independent since it has no control over it >> >> any chance of permuting the 'C6 state' and 'cool-n-quiet' settings and redo >> measurements? >> >> - Michael >> >>
Certainly...for science! Same hardware as before, but I put in a cheap Radeon 6450 PCIe card to give a little more performance on the desktop responsiveness. Reset the UEFI settings, proceeding while changing only the EPU, Cool-n-Quiet (CnQ) and C6 settings. Reboot between changes. Same software as before. Results are [servo] : [base] +EPU +CnQ +C6 22534 : 20476 -EPU +CnQ +C6 26157 : 19378 -EPU -CnQ +C6 22729 : 19206 -EPU -CnQ -C6 8002 : 6628 +EPU +CnQ -C6 6385 : 4712 With the video card, the results seemed to be not as good as before, but since the C6 option seemed to be the key, I reverted the EPU and CnQ power options back on, and seemingly got a little better result. Performing a lot of IO could make the glxgears grind down to single digit framerates. The very worst test I could come up with was both disk and net IO with CPU load: rsync the entire contents of the disk via ssh to another computer, but that would still only occasionally bump it up to little over 8000:8000 on the last test. The 'Pro' version of this motherboard has a parallel port, accessible with a ribbon cable to a header. I'm happy to report that EPP transfers appear to work correctly with a Pluto-P that I've been holding on to. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
