Mini PC for LinuxCNC/CPU Realtime Performance
- tommylight
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19 Feb 2026 18:31 #343198
by tommylight
Replied by tommylight on topic Mini PC for LinuxCNC/CPU Realtime Performance
Probably Intel network card, so have a look here for use of ethtool to set the rx to 0
forum.linuxcnc.org/27-driver-boards/4750...i96s-a-little-jitter
forum.linuxcnc.org/27-driver-boards/4750...i96s-a-little-jitter
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- summat
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19 Feb 2026 20:28 #343200
by summat
Replied by summat on topic Mini PC for LinuxCNC/CPU Realtime Performance
Many thanks for the reply. Just SSH'd onto the machine - yes, Intel Ethernet controller. I'll wait for morning (and for the icicles to disappear) and try the recommended settings in that link, and report back.
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- rodw
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20 Feb 2026 00:46 #343207
by rodw
Replied by rodw on topic Mini PC for LinuxCNC/CPU Realtime Performance
a kernel trace also provides interesting data. when I did that on a 4 core i5, the servo thread was using about 200 usec and slept for 800 usec. Its the random incursions that take the servo-thread beyond 1000 usec that are the issue. I don't think Wireshark will show the full picture.
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