bitkeeper revision 1.1159.212.118 (420808adQbNXWTSEhY2Rqu5ALqDF5Q)

bitkeeper revision 1.1159.212.118 (420808adQbNXWTSEhY2Rqu5ALqDF5Q)

- Detect the CPU speed automatically, rather than having the user
  specify a ips in bochsrc. The user can still specify it to override
  the auto-detected value.

- Care should be taken to make sure that tsc_per_bx_tick is not too
  small or too big. Otherwise, numerical precision issues may result
  in the wrong calculation of elapsed time

Signed-off-by: Edwin Zhai <edwin.zhai@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: ian@xensource.com