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To INT_MAX... and Beyond! Exploring Large-Count Support in MPI
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hammond, Jeff R. Schafer, Andreas Latham, Rob |
| Copyright Year | 2014 |
| Abstract | In order to describe a structured region of memory, the routines in the MPI standard use a (count, datatype) pair. The C specification for this convention uses an int type for the count. Since C int types are nearly always 32 bits large and signed, counting more than 231 elements poses a challenge. Instead of changing the existing MPI routines, and all consumers of those routines, the MPI Forum asserts that users can build up large datatypes from smaller types. To evaluate this hypothesis and to provide a user-friendly solution to the large-count issue, we have developed BigMPI, a library on top of MPI that maps large-count MPI-like functions to MPI-3 standard features. BigMPI demonstrates a way to perform such a construction, reveals shortcomings of the MPI standard, and uncovers bugs in MPI implementations. |
| Starting Page | 1 |
| Ending Page | 8 |
| File Size | 314927 |
| Page Count | 8 |
| File Format | |
| ISBN | 9781479970322 |
| DOI | 10.1109/ExaMPI.2014.5 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-11-17 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Context Memory management Vectors Libraries Standards Optimization Open area test sites |
| Content Type | Text |
| Resource Type | Article |
