mpi4py-examples

This repository contains advanced parallel computing scripts to run against an MPI cluster.

License: GNU General Public License.

The creation and configuration of the cluster can be seen here:

The example provided in this repository is about matrix multiplication via MPI. The approach used is by slicing the matrix and sending each chunk to a particular node of the cluster, perform the calculations and send the results back to the main node.

The results of the execution can be seen below (time in seconds):

Test	Sequential Time	CPU1	CPU2	CPU3	CPU4	CPU1	CPU2	CPU3	CPU4	CPU1	CPU2	CPU3	CPU4	Max	Speedup
12x12	0.01111	0.00525				0.0037				0.0037				0.00525	2.116190476
12x12	0.01111	0.00292	0.00202			0.00208	0.00303			0.00206	0.00211			0.00303	3.666666667
12x12	0.01111	0.00197	0.00175	0.00129		0.00205	0.00182	0.00122		0.00218	0.00183	0.00127		0.00218	5.096330275
12x12	0.01111	0.00214	0.00233	0.00212	0.00194	0.00202	0.00234	0.00267	0.00185	0.00201	0.00222	0.00209	0.00241	0.00267	4.161048689
60x60	1.29955	0.4778				0.36717				0.36728				0.4778	2.719861867
60x60	1.29955	0.35127	0.27552			0.20697	0.34767			0.27474	0.207			0.35127	3.699575825
60x60	1.29955	0.21966	0.22068	0.15385		0.22046	0.22196	0.15476		0.22054	0.22058	0.15436		0.22196	5.854883763
60x60	1.29955	0.18464	0.18589	0.18397	0.18379	0.18283	0.1851	0.18473	0.18374	0.18373	0.18427	0.18396	0.18381	0.18589	6.990962397
144x144	15.02287	5.08906				4.99491				4.93309				5.08906	2.951993099
144x144	15.02287	2.78648	2.90336			2.67886	2.78634			2.89459	2.68409			2.90336	5.174304943
144x144	15.02287	3.11941	2.69587	2.022		3.12694	2.69165	2.0254		3.12809	2.68855	2.01999		3.12809	4.802569619
144x144	15.02287	2.37735	2.3879	2.2758	2.38267	2.37713	2.27037	2.38764	2.37814	2.25782	2.38018	2.38604	2.27187	2.3879	6.29124754
216x216	51.69995	17.26683				17.08989				16.66551				17.26683	2.994177275
216x216	51.69995	9.67602	8.63827			8.60859	9.65453			8.62195	8.62782			9.67602	5.343100779
216x216	51.69995	10.52823	9.46254	7.30951		10.51718	9.44692	7.30529		10.54083	9.48649	7.28061		10.54083	4.90473236
216x216	51.69995	8.13615	8.12379	8.00465	8.13003	8.13992	7.94381	8.14352	8.1071	8.00023	8.13681	8.14298	7.999	8.14352	6.348599868

See the multiplication in action using 3 CPUs on each node:

Licence

mpi4py-examples Copyright (C) 2016 Jordi Corbilla
This program is free software: you can redistribute it and/or modify it under the terms of the GNU 
General Public License as published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even 
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License along with this program. 
If not, see http://www.gnu.org/licenses/.

mpi4py-examples

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