Using time.sleep() in 2 threads causes lockup whenhyper-threading is enabled

[OlafMeding at gmail.com]

Tim, Serge, Dennis

Yes it happens every time.  The PC does not run any other programs.  We
have tried multiple PC but they all have an identical configuration.
We usually start the test leave the PC alone.  The best way to test my
posted .py program is to start the test before going to lunch or before
going home for the day.

Olaf