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the Fortran routine. Although a little indirect, the concept is straightforward.
In the first example, I integrate Cython and Fortran.
Fortran/C and Cython
The Fortran 90 [2] website, which lists best
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). The resulting Python library is very easy to use: You use a function from the gfort2py
Python module, and it handles the heavy lifting, so to speak (Listing 7).
Listing 6: Compiling Fortran Code
$ gfortran -fPIC -shared -c ... High-Performance Python 2
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DEjAhocW2hraXMIIEowIBAAKCAQEAhXo2cUYv
B8/P/BP0ges6i7VJ9Oj1bDHfILtu805syqwN5J6IBcgvesthq4Xpj4zuIVsCctU5SEIkx9texM+b
....
fuy3QFJdl3rM0w/ry1QDRy5WgfZsIpAQZUuCaZgZx2BavviuVcFGrd67RfP6gt2yBk7EhN0gQCN2
X5
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/2),n
d(j) = c(j) - e(j)
end do
#pragma acc parallel loop copyin(a, b, e)
create(c) copyout(d)
{
for (int i=0; i < n; i++)
{
c[i] = a[i] * b[i]
}
for (int j=(n/2
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such as SWIG, Pyfort, and F2PY. Writing parallel functions in Python is very difficult, but it’s fairly straightforward in C and Fortran with the use of a variety of abstractions, including OpenMP, which
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Fortran, C, or C++ codes" [4].
Simple mpi4py Examples
For the example programs, I used the mpi4py
install for Anaconda [5] and built it with MPICH2 [6]. Running mpi4py
Python codes follows the MPICH2
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.
Figure 1: Sed syntax structure.
To put multiple commands on one line use the -e option:
sed -e 'command1' -e 'command2' ... -e 'commandN' ....
Or, you can add these commands from a script file
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. MPI for Python (mpi4py
) was developed for Python with the C++ bindings in the MPI-2 standard. The 1.0 release was on March 20, 2020, and the current release as of this writing is 3.0.3 (July 27, 2020). Mpi4py
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).
FreeBSD: x86/64 (64-bit); x86 (32-bit).
The following examples were built and run on a Limulus personal cluster running Scientific Linux 6.2 on an Intel i5-2400S with 4GB of memory. If you don ... Parallel Julia: Part 2
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, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192]
A = single( rand(N,N) );
B = single( rand(N,N) );
start = clock();
C = A*B;
elapsedTime = etime(clock(), start);
gFlops = 2*N*N*N / (elapsedTime * 1e+9);
disp(sprintf("N = %4d
