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i.MX6: Has someone tried PREEMPT_RT patch

Question asked by Rajan Srivastava Employee on Oct 30, 2012
Latest reply on Feb 6, 2015 by Sinan Akman

Has someone tried PREEMPT_RT patch for Linux on i.MX6?

If yes, did you try measuring RT-latency via cyclictest -- if so, can you please share your observations?


What problem I am observing: if I use '-M' command line argument to cyclictest (that causes screen refresh only when latency is increasing), cyclictest doesn't report any latency, it just sits silent.


If I run it without '-M' option to cyclictest, I am observing latencies in order of 100s of microseconds, when there's no load at all on the CPU.