| title | description | published | date | tags | editor | dateCreated |
|---|---|---|---|---|---|---|
GPAW |
true |
2022-03-26 15:22:23 UTC |
markdown |
2022-03-26 15:22:20 UTC |
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Cython program
- Pros and Cons of Hybrid MPI/OMP
- 70% runtime in C, 30% runtime in Python
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Computation intense program
- Highly depend on Math library
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Hybrid MPI/OpenMP program
- Pros and Cons of Hybrid MPI/OMP
- Balance of MPI/OpenMP
- ELPA
- A highly efficient and highly scalable direct eigensolvers for symmetrix(hermitian) matrices.
- with this math library, the performance can increase 3x-5x.
- Accroding to the IPM Profile information, we figure out that MPI_Allredce is the most time comsuming.
- We have tried profile the ratio of MPI and OpenMP since it is a Hybird MPI/OpenMP program, but the performance is unstable since different python use gpaw may have different calculate routines.
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Python GIL Lock sometimes make profile difficult.
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Cython program usually have time cosuming part at C code, optimize this part.
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Some General Math Library (such as MKL) may not help a lot with specific program, but some minor specific Library will.