Originally posted by: amindehghanian

Hello,

Is there any way that I can figure out how much time CPLEX spends on pre-processing of an MIP?

Thanks,

Hi,

within CPLEX only you have presolve time in the log : https://www.ibm.com/support/knowledgecenter/ko/SSSA5P_12.6.0/ilog.odms.cplex.help/CPLEX/UsrMan/topics/progr_adv/presolve_adv/02_presolve_intro.html

if you refer to OPL preprocessing, then within the IDE you could use the profile tool described at IDE and OPL > CPLEX Studio IDE > IDE Tutorials > Profiling the execution of a model

in the command line you can use oplrun -profile

This option activates the profiler. At the end of execution, a summary of the execution is output, indicating how much time and memory has been spent at the different stages of execution.

regards

Originally posted by: amindehghanian

Thanks for your answer.

I want to clarify my question by adding this point that I am using CPLEX callable library. What about that? is there a way to get the presolve time?

thanks again,

Hi,

you will get this info in the log file:

CPLEX > User's Manual for CPLEX > Programming considerations > Managing input and output > Managing log files

From the Callable Library, first use the routine CPXfopen to open the target file; then use the routine CPXsetlogfile. The Callable Library Reference Manual documents both routines.

regards