On Thursday, February 02, 2012 01:54:13 AM Tom Easterday did opine: > Gene, > > I too see a big improvement in overall system performance by using > taskset to move linuxcnc to the idle core (I am running 2.5.0-pre2 > built from source). Out of curiosity how much cpu does Axis use on > your machine? While running Axis I am using about 60% of the second > core. I don't have a base thread (I have mesa cards doing step > generation) and have a servo thread running at 600,000. > Running a 25 u-sec base thread I'm seeing about 45-60% on the 2nd cpu from linuxcnc. The last version of 2.6.0-pre before the rename developed an offset in the Z that could not be homed out, so I went back to the slightly newer linuxcnc-2.6.0-pre, problem solved.
> Also, i noticed that if I run the latency-test on the idle core AND run > glxgears there (using taskset to move it too), my latency is very bad. Expected, the screen updates for glxgears will eat a lot of time & cpu. I get 7 to 12 u-secs latency running it normal, and under 3 u-secs using taskset and glxgears has no effect if it is run normally. > Worse even than the machine without isolcpus configured at all. On the > IRC today Peter Wallace pointed out that that is a silly scenario since > there wouldn't be anything running on the isolated core other than > linuxcnc, and I agree, but I thought it interesting that the latency on > that core was so much worse. That's why I only run one thing at a time using taskset, latency-test OR linuxcnc. > -Tom Cheers Tom, 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> Too much is not enough. ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
