I'm seeing this very similar error on one of our stack of four 3850-48F-L's running IOS-XE 16.3.7, up time is just over 42 weeks. CPU does not seem to spike and it averages around 15-20%. Switch functionality does not seem to be impacted. Example of log message:
Dec 10 09:16:19: %EVENTLIB-3-CPUHOG:Switch 1 R0/0: smd: undefined: 185ms, Traceback=1#b9ead68180bccefb5e345085c9f5a5ea binos:FFEE09E000+160F0 binos:FFEE09E000+160F0 c:FFEC179000+AC15E c:FFEC179000+DE250 c:FFEC179000+D92A8 c:FFEC179000+DA44C btrace:FFEF1F5000+4124 evlib:FFEF2CE000+A5F8 evlib:FFEF2CE000+B3E0 orchestrator_lib:FFEF298000+C030 luajit:FFEC702000+5012C
