DUALTHREADS

Determines the maximum number of threads that dual simplex is allowed to use. If DUALTHREADS is set to the default value ( -1), the THREADS control will determine the number of threads used.

Integer

-1 (determined by the THREADS control)

When solving a linear MIP, the dual simplex algorithm will use multiple threads only when solving the initial LP relaxation or when reoptimizing between rounds of cuts on the root node.

The parallel dual simplex algorithm differs from the sequential dual simplex algorithm and might follow a different solve path. For DUALTHREADS > 1 the solve path is independent of the number of threads used, although the practical limit for observing performance benefits is around DUALTHREADS = 8.

XPRSlpoptimize ( LPOPTIMIZE).

CONCURRENTTHREADS, THREADS.