Re: PREEMPT_RT benchmark

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

Michel Macena Oliveira wrote:
>
> If I understand correctly  when Cyclictest writes to the
> cpu_dma_latency file, the processor does not sleep and remain
> full power all the time. Is there any problem writing a RT application
> (not a benchmark one) with this trick?
>

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

>
> Could it cause any harm to the system?
>

Talk to your CPU provider.

Yes, sometimes CPU providers warn about that, especially for x86 (Note:
I don't speak for Intel or any other x86 manufacturer).

Good luck,

--
Ahmed S. Darwish
Linutronix GmbH



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