Question about NMIs and Xenomai.

Jan Kiszka jan.kiszka at
Tue Jul 14 09:45:40 CEST 2020

On 14.07.20 08:52, 孙世龙 sunshilong via Xenomai wrote:
> Hi, list.
> I have googled for a long time and read the posts on the official
> website(besides <<Life-with-Adeos>>) carefully, but I still can't find
> the answers which directly answer these questions about NMIs:
> *Is it possible that NMI watchdog influences the latency of Xenomai?
> *Is it possible that Xenomai threads(which are busy running for
> several seconds) block the Linux domain from handling the non-maskable
> interrupts?
> I would be grateful if somebody shed some light on these questions.
> Yours sincerely.

Neiher Xenomai nor I-pipe block NMIs. If Linux is configuring them for 
certain debugging or observation purposes, e.g. perf, they hit also the 
real-time domain.


Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux

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