On Thu, 16 May 2019, bari wrote:
Date: Thu, 16 May 2019 15:10:12 -0500
From: bari <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: [Emc-users] New PC Hardware for preempt-rt and Mesa Ethernet
Anyone care to list which new cpus and motherboards (currently on store
shelves) they have found to work well with preempt_rt and Mesa Ethernet
cards?
For a 1 KHz servo thread, Most PC hardware can be made to work though slower
and lower power hardware is worse. Current fanless MBs that seem ok are MBs
using Intel - J3355, J3455, J4005, J4105, J4205. Not sure on low power AMD
since my last AMD test CPU was a 1 GHz E1-2100 which was on the lower edge of
usability at 1 KHz. Likely any current AMD or Intel CPU with a fan will be
fine.
Note that for the Ethernet cards, the latency is not terribly important, you
just need to reliably communicate on the Ethernet port at a 1 KHZ rate (3 K
packets per second)
If you need a faster servo thread, then you have to test MBs, I have a couple
Motherboards that will reliably run a 4 KHz servo thread (12K packets per
second), none are fanless.
Ive had the best luck with Realtek or Intel Macs, Broadcom and Atheros are
best avoided.
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Peter Wallace
Mesa Electronics
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