Hi Daniel, Thanks for your answer! That was the problem! 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? Could it cause any harm to the system? My idea is to develop a RT application in which I have a scheduled thread to compute and deliver results in a given time or interval. Michel Em qui., 11 de mar. de 2021 às 09:27, Daniel Wagner <wagi@xxxxxxxxx> escreveu: > > Hi Michel, > > On 10.03.21 21:07, Michel Macena Oliveira wrote: > > At least that's what I expected, but my latencies are much bigger than > > Cyclictest ones. > > From cyclictest I get an average in my computer of something between > > 2300 and 2500 nanoseconds. However, in my application I'm having > > something between 47000 and 55000 nanoseconds. As you can see it is > > much higher! > > > > I'm not sure of what I'm doing wrong, could you help or suggest something? > > Check if your system uses power managment. cyclictest disables the power > management by using the /dev/cpu_dma_latency API. > > HTH, > Daniel
