[LITMUS^RT] Running LITMUS-RT on ARM64

[Björn Brandenburg]

> On 6. Sep 2017, at 19:18, Andrii Anisov <andrii_anisov at epam.com> wrote:
> 
> I've realized the origin of rounding error I faced and was trying to work around. It is the calculation error of this [1] line. Due to the fact that `0.01` is presented in `double` as a bit bigger value, consequent substractions delivered an accumulating calculation error.

Ah, I see. I guess this should eventually get improved, too, though it’s not a particularly critical functionality. 

> But I've reconsidered my code to make all loop count calculations in `double`, and do `double` to `int` conversion right before counted looping. From one side this shrinks possible calculation error impact down to one loop time, from other hand, gives us possibility to properly loop for fractions of ms (i.e. from this code [2]).
> 
> Please see an updated PR. Note that I've put the last change as a separate patch in order to keep it visible for you. Once you are ok with the code I'll squash that change and provide clean patches for merge.

Looks good! Please send the squashed PR.

Thanks,
Björn