======= (c) Z Koza, 2013                               =============
======= przykładowa  KOMPILACJA programu mpi_cuda.cpp  =============

/usr/local/mvapich2_1.8/bin/mpic++ -O2 mpi_cuda.cpp -I/usr/local/cuda/include -lcuda -lcudart -lcublas  -L/usr/local/cuda/lib64

=====================================================================
==============         WYNIKI            ====================
==============    1 proces MPI, 1 GPU    ====================

> time /usr/local/mvapich2_1.8/bin/mpirun -np 1 ./a.out 600000000
[0.0000] : "start"
[0.0001] : "cudaDeviceSynchronize =   CUDA initialization"
		Running 1 MPI processes; found 6 CUDA-capable devices
		Processing 600000000 doubles (4.80 GB)
[0.0000] : "Checking the number of devices"
[2.0087] : "Array allocation on host"
[11.4684] : "Array initialization on host"
[0.6902] : "Calculating the sum on host"
		Sum on the CPU: 300005959.6066419
[0.0001] : "cudaSetDevice"
[0.0045] : "cudaMalloc"
[1.1303] : "cudaMemcpy"
[0.0017] : "cublasCreate"
[0.0517] : "cublasDasum (calculates the sum on the GPU)"
[0.0006] : "cublasDestroy"
[0.0896] : "cudaFree"
		Sum on the GPU: 300005959.6065826

real	0m22.996s
user	0m12.901s
sys	0m8.273s



==============   6 procesów MPI, 6 GPU   ======================

> time /usr/local/mvapich2_1.8/bin/mpirun -np 6 ./a.out 600000000
[0.0000] : "start"
[0.0000] : "cudaDeviceSynchronize =   CUDA initialization"
		Running 6 MPI processes; found 6 CUDA-capable devices
		Processing 600000000 doubles (4.80 GB)
[0.0000] : "Checking the number of devices"
[0.5303] : "Array allocation on host"
[2.1090] : "Array initialization on host"
[0.2729] : "Calculating the sum on host"
		Sum on the CPU: 299989790.6363971
[0.0001] : "cudaSetDevice"
[0.0137] : "cudaMalloc"
[0.2763] : "cudaMemcpy"
[1.3154] : "cublasCreate"
[0.0087] : "cublasDasum (calculates the sum on the GPU)"
[1.5487] : "cublasDestroy"
[1.4360] : "cudaFree"
		Sum on the GPU: 299989790.6364686

real	1m12.696s
user	0m24.462s
sys	0m57.052s

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