Hi

Take a look to mdrun -nt flag to set the number of threads. Otherwise the default is guessed according to the description displayed by mdrun (what effectively means to take all available ones, I think).

There are several related entries in the mailing list. Keep in mind that thread-based parallelization is suported just from 4.5.x.

El 04/05/11 11:54, vidhya sankar escribió:
Dear gmx user
                        when we run MD by mdrun tool in gromacs
IS there is any option in command prompt to include and controll the number of processor ? otherwise will it automatically use all available processor?
Because i am using pentum  Intel i5 processor
When i run MD will it take all processor for calculation steps of MD by default ?


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