[time-nuts] Re: PPS latency? User vs kernel mode

Poul-Henning Kamp phk at phk.freebsd.dk
Tue Dec 14 05:35:56 UTC 2021


--------
Andrew Kalman writes:

> in a cooperative RTOS, the only latency is the MCU's own interrupt handling
> mechanism.

Which, as I explained earlier in the thread, is increasingly rubbish
on any high-end platform these days because it is gone "soft" and become
a message-passing phenomena across several clock domains etc.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.




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