Improving MPI communication latency on euroben kernels
Revision as of 14:12, 8 March 2012 by Chandan Basu (NSC) (talk | contribs)
| 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 |
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 many nodes is not good. The performance of alltoall operation can be improved 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
Status
- Started code modification. The basic algorithm will remain same. Will map the communication such that there is more communication within node than outside. [30/03/2011]
- Some initial results are obtained and some improvements are achieved [25/05/2011]
- The tests are run on Curie. The standard MPI_Alltoallv calls are repalced by topology aware MPI_Alltoallv_tuned calls. [16/01/2012]
- Contributed to deliverable D7.5 [28/02/2012] Template:Pdf
- Writing final report
Members
| Centre | Role | Field | |
|---|---|---|---|
| Chandan Basu (NSC) | NSC | Application expert | Computational science |
