Improving MPI communication latency on euroben kernels

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Name Improving MPI communication latency on euroben kernels
Description Improving the MPI collective performance by network aware communication
Project financing   PRACE
Is active Yes
Start date 2010-07-01
End date 2012-06-30


Members

 CentreRoleField
Chandan Basu (NSC)NSCApplication expertComputational science

Description

The goal of this project is to improve the performance of some euroben kernels. This project is part of PRACE-1ip, WP7.5. The euroben kernel is a set of synthetic benchmark codes which is developed by PRACE. This kernel is used for benchmarking PRACE systems. Some of these benchmarks, e.g., mod2f uses MPI_Alltoall based collective for doing fast Fourier transform. Generally the MPI_Alltoall scaling on large nodes is not good. The performance of alltoall operation can by introducing network awareness in alltoall operation. This can be done by writing a modified alltoall and then calling that from the application code. We tested our modified alltoall on mod2f benchmark with good results

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