Re: PREEMPT_RT benchmark

Michel Macena Oliveira wrote:

Ahmed S. Darwish wrote:

quoted

[ again, no top-posting please... ]

...

quoted

Well, if you do it for the benchmark, but not for production, then of
course, the benchmark is meaningless.

Then in case of a RT application for production I should "live" with
this problem?

Well, you should have an over-all realtime strategy for your product.

This includes thermal requirements for both CPU (communicated with the
provider, due to the possible removal of power-saving support in SW) and
system enclosure... then you know if you can "live with it" or not.

quoted

If you're interested, I presented a small talk about the topic here:
https://linutronix.de/PDF/Realtime_and_graphics-acontradiction2021.pdf

Thanks, really helpful, but if I understand, in your application
you've used Intel CAT to mitigate the latency and plan to use Intel
MBA as well. Is that true?

Sorry for being picky, but this was part of another e-mail sub-thread.
You should've kept it there...

Anyway, the answer to your question is yes. You need to talk to Intel
for MBA support on non-Xeon CPUs though, as the instructions are only
available under an NDA. I cannot comment further on this.

Good luck,

--
Ahmed S. Darwish
Linutronix GmbH