Cheap J1900 computer that worked kinda well.

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13 Aug 2017 13:12 - 13 Aug 2017 13:15 #97410 by Moronicsmurf
Moronicsmurf created the topic: Cheap J1900 computer that worked kinda well.
so i have one of these chinese NUC htings with a J1900, similar to this: www.ebay.com/itm/162546020408

And run the latest version of www.linuxcnc.org/testing-stretch-rtpreempt/

And get this times initially


and after 4 hours of glx gears.


Nowto just get this effing 7i76E card working..
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Last Edit: 13 Aug 2017 13:15 by Moronicsmurf.
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13 Aug 2017 23:40 #97429 by rodw
rodw replied the topic: Cheap J1900 computer that worked kinda well.
That is way better than what I get from my Gigabyte one!
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14 Aug 2017 11:20 #97446 by Moronicsmurf
Moronicsmurf replied the topic: Cheap J1900 computer that worked kinda well.
Right u used a Gigabyte nuc one.. This is a cheap chinese one with 8Gbs of ram but still, good numbers. that max jitter is maybe so so, but if using a mesa card i think it will be fine on a plasma machine. =)
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14 Aug 2017 14:48 #97453 by Moronicsmurf
Moronicsmurf replied the topic: Cheap J1900 computer that worked kinda well.
And after little more than 24 hours.



And the blatantly DESTROYED by Firefox. :D

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14 Aug 2017 15:03 #97454 by Moronicsmurf
Moronicsmurf replied the topic: Cheap J1900 computer that worked kinda well.
I do find it go up to about 190.000 or so if i fiddle with say display sizes and turning on and off power settings for some reason..
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14 Aug 2017 15:21 #97456 by PCW
PCW replied the topic: Cheap J1900 computer that worked kinda well.
In general all power management needs to be disabled in the BIOS setup for decent real time performance.
That includes clock speed switching, C states above C1, AMD Cool and Quiet mode etc etc
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14 Aug 2017 15:46 #97461 by Moronicsmurf
Moronicsmurf replied the topic: Cheap J1900 computer that worked kinda well.
So i turned of ACPI and some of the other power saving features.. jitter went up to 72.000
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14 Aug 2017 20:17 #97482 by rodw
rodw replied the topic: Cheap J1900 computer that worked kinda well.
I think you still have a useable machine for a Mesa ethernet card. It would be interesting to try Chrome instead of firefox.
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15 Aug 2017 08:50 #97495 by Moronicsmurf
Moronicsmurf replied the topic: Cheap J1900 computer that worked kinda well.
Your suspicion were right, with Google Chrome max jitter never went over 58.000, but with Chromium the free version it went above 200.000 and firefox about 105.000. =)
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