Continual reading from the PowerPc time base register is not stable

[Segher Boessenkool]

> After trying the new code with "isync" and unsigned long long convertion,
> this problem doesn't happen(I tested for several minutes).

Do you now ever get two consecutive time readings that are closer
that 64 tick together?  If not, it's simply hiding the problem.

Do you ever now read a value that does not have the bit with value
0x40 set?


Segher