Przemek Klosowski wrote: > > > I don't know---but the project goal is to get it around 10us. The > rt-linux people have a tool called cyclictest > > http://people.redhat.com/williams/latency-howto/rt-latency-howto.txt > > as well as several other interesting tools, including a way to measure > SMI interrupts by reading a MSR that directly counts them. I am not a > rt-linux guru but I think they have a lot of interesting tools as > well as a promising kernel technology. I don't know if I will be able > to work on bringing back rt-linux integration but I certainly would > like to try. > 10 us latency would be excellent for servo systems, and pretty good for general stepper systems, too.
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