SCIPIONI Roberto wrote:
>One of the basic functions in MPI is
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>MPI_COMM_RANK
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>by calling it the program knows how many tasks are available
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>call MPI_COMM_RANK(MPI_COMM_WORLD,rank,ierr)
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>write(",")'the rank is',rank
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No. MPI_Comm_rank tells a process what its particular rank is within
the current execution. MPI_Comm_size tells a process how many processes
there are for a particular execution. There is no theoretical limit on
the number of processes that can exist. universe_size may (depending on
the MPI implementation) give some information about how many processes
may be practical.
I hope this helps.
Dave.
>does it make sense ?
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>R.
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>>I have a question about MPI Rank.
>>How can MPI Rank determine how many process a computer can have?
>>
>>A life without knowing anything is not a life at all.
>>
>>Live your life with your own decision so you will never regret
>>what you have done when you look back.
>>
>>
>>
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