Userdecomposition » History » Version 1
Nicolas Aunai, 17/10/2015 01:03 PM
| 1 | 1 | Nicolas Aunai | h1. Domain partitioning |
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| 3 | h2. User defined |
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| 5 | Heckle lets the user specify how to partition the simulation domain. |
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| 6 | You just have to enter the number of MPI domains (partitions) in each direction, in the heckle.txt file. |
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| 9 | <pre> |
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| 10 | ----number-of-mpi-domains-------------------------------------- |
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| 11 | 64 32 1 |
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| 12 | --------------------------------------------------------------- |
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| 13 | $----------------------------------------------------------------------- |
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| 14 | </pre> |
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| 17 | the last line says the user wants 64, 32 and 1 MPI domains in the directions x, y and z, respectively. |
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| 19 | Here the total number of partition desired is 2048. Heckle will switch to automatic domain partitioning if ran with any other number of processes. |
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| 20 | For example : |
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| 22 | mpirun -n 1024 ./heckle.exe ./ |
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| 24 | will perform automatic domain partitioning with 1024 cores, disregarding the 64x32x1 domains specified in heckle.txt |
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| 28 | h2. Automatic |