ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Computation time reporting

C Name

CPX_PARAM_CLOCKTYPE

C++ Name

ClockType

Java Name

ClockType

.NET Name

ClockType

InteractiveOptimizer

clocktype

Identifier

1006

Description

Decides how computation times are measured for both reporting performance and terminating optimization when a time limit has been set. Small variations in measured time on identical runs may be expected on any computer system with any setting of this parameter.

On UNIX platforms, where it is possible to measure CPU time, the default setting 0 (zero) allows ILOG CPLEX to choose wall clock time when other parameters invoke parallel optimization and to choose CPU time when other parameters enforce sequential (not parallel) optimization.

On Microsoft Windows platforms, computation time is always measured as wall clock time.

Values

Value 
Meaning 
Automatic: let CPLEX choose; default 
CPU time 
Wall clock time (total physical time elapsed)