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FICO's avatar
FICO
Community Manager
7 years ago

Parameter Threads

Hi,

I'm using Fico Xpress and I have a question about the parameter THREADS.

According to the documentation, THREADS > 0 means the "number of threads to use".

Let suppose THREADS = 4.

In this case, a) the solver is forced to execute with 4 threads during its whole execution; or b) the solver is able to use at most 4 threads, i.e., some times with number of threads lower than 4.

Thank you,

Michael David

2 Replies

  • FICO's avatar
    FICO
    Community Manager

    It is case b) : the solver will use up to the specified number of threads. For example, if you specify a large number of threads for a MIP problem that solves quickly, there might not be enough time to start all the specified number of threads, eg during branch-and-bound search, before the optimization terminates.