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  • sleep 1/70 not allowed on my machine ... Commented Oct 12, 2012 at 21:07
  • not even near to what i want to achieve, how i can execute things faster ? Commented Oct 12, 2012 at 21:19
  • Sorry, by fractional, I didn't mean expressed as n/m where n and m are integers, but as decimals with a fractional part. I suppose you could also call them decimal floating point numbers though I'm not sure about the proper English terminology Commented Oct 12, 2012 at 21:20
  • i think that i'm going to avoid the of the shell ... Commented Oct 12, 2012 at 21:27
  • The answerer is right. Shells and processes are usually not well suited to millisecond resolution. For reliable performance, you'll need to compile a program that calls usleep(3) or the like -- and you may need to recompile your kernel with a different configuration, as well; or at least feed different parameters to your kernel's runtime scheduler. This is nontrivial to do. A standard Debian installation with a standard kernel has limited realtime capabilities. Still, you might want to check out the nice(1) command; it might help. Commented Sep 12, 2016 at 0:43