| 1 | |
| 2 | = Part I Message Passing Interface; MPI = |
| 3 | * A standardized and portable message-passing system |
| 4 | * Not a new language ---- Library of functions |
| 5 | * Scales to over 100k processors |
| 6 | * Runs on distributed memory cluster systems. |
| 7 | * Portable |
| 8 | * Explicit parallel programming (unlike OpenMP) |
| 9 | * No shared variables (unlike OpenMP) |
| 10 | |
| 11 | |
| 12 | == MPI’s Execution model == |
| 13 | * All processors execute same program, but with difference data. (no fork & join) |
| 14 | * Variable on each are all private. |
| 15 | * Data that must be shared is explicitly send between processors. |
| 16 | |
| 17 | [[Image()]] |
| 18 | |
| 19 | == Distributed Memory Cluster == |
| 20 | [[Image()]] |
| 21 | |
| 22 | Data sent over Network: |
| 23 | |
| 24 | * Ethernet |
| 25 | * 10M~1GBit/Sec |
| 26 | * InfiniBand |
| 27 | * 100GBit~ |
| 28 | * MPI on SMP machine |
| 29 | * You can run MPI program on SMP (Symmetric Multiprocessing) machine. |
| 30 | * Variables are not shared (all private). |
| 31 | |
| 32 | == Software Distribution == |
| 33 | * [[http://www.open-mpi.org|OpenMPI]] |
| 34 | * [[http://software.intel.com/en-us/intel-mpi-library|Intel MPI Library]] |
| 35 | * [[http://www.lam-mpi.org|LAM/MPI]] |
| 36 | * [[http://www.mpich.org|MPICH]] |
| 37 | * [[http://mvapich.cse.ohio-state.edu/index.shtml|MVAPICH]] |
| 38 | * [[http://msdn.microsoft.com/en-us/library/bb524831%28v=vs.85%29.aspx|MS MPI]] |
| 39 | |
| 40 | |
| 41 | == Brief Tutorials for Programming Languages == |
| 42 | * [[cypress/Programming/Cexamples/Mpi|C]] |
| 43 | * [[cypress/Programming/CppExamples/MpiCpp|C++]] |
| 44 | * [[cypress/Programming/FortranExamples/MpiFortran|Frotran]] |
| 45 | |