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BigMPI: You can haz moar counts!

June 13, 2014 at 9:01 am PST

Grumpy cat hates small MPI countsJeff Hammond has recently started developing the BigMPI library.

BigMPI is intended to handle all the drudgery of sending and receiving large messages in MPI.

In Jeff’s own words:

[BigMPI is an] Interface to MPI for large messages, i.e. those where the count argument exceeds INT_MAX but is still less than SIZE_MAX. BigMPI is designed for the common case where one has a 64b address space and is unable to do MPI communication on more than 231 elements despite having sufficient memory to allocate such buffers.

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