[LITMUS^RT] Running LITMUS-RT on ARM64

[Björn Brandenburg]

Hi Andrii,

a quick heads-up and a question...

1) I had some prior patches pending (which I forgot about) that already used up the -A option, so I had to resolve the option clash. The calibration loop is now triggered with -a0. 

2) Do you have some guidance for how to use your new calibration and workload code? When I ran the calibration loop and then plugged the obtained value for 1ms into -a, I saw calibration errors in excess of 50% when using -l.  Is this expected?

Thanks,
Björn