https://forge.codesys.com/forge/talk/Runtime/thread/0e1d92276c/2020-12-09T18:28:30.671000ZRecent posts to Raspberry OS 64bit, Kernel PREEMPT RT, CPU Pinning 2020-12-09T18:28:30.671000Z2020-12-09T18:28:30.671000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com82b99182cc708e2d22c9366d3e58ce48379f1efa

<div class="markdown_content"><p>at the moment it is not tested/made for 64bit.<br/> So I would recommend to switch back to 32Bit OS.</p></div>

2020-12-09T16:28:46.198000Z2020-12-09T16:28:46.198000Zmondinmrhttps://forge.codesys.com/u/mondinmr/https://forge.codesys.com0fc120c64b4e68c2893b66a489644da8314384f5

<div class="markdown_content"><p>Hello to all.<br/> I just tested 32 bit runtime for PI on a Raspberry PI 4, 5.4.51 kernel compiled by me from scratch after patching it to PREEMPT RT.<br/> I isolated core 1 from the CPU leaving the cores untouched 0,2,3.<br/> Codeyscontrol changed to init.d, and taskset on isolated core.</p> <p>I achieved an average jitter above 28-30us and some peaks above 100us.</p> <p>However, I notice that the runtime dies every 50-60 seconds after starting.<br/> Do you think this is due to the fact that I used a 64bit Raspberry OS?</p></div>