Difference between revisions of "Programming/Perl"
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| − | |style="width:95%; border-width: 0" | When programming with Perl in | + | |style="width:95%; border-width: 0" | When programming with Perl in an HPC environment you will need to change the first line as shown below |
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#!/usr/bin/env perl | #!/usr/bin/env perl | ||
# | # | ||
| − | # | + | # HPC |
| − | # | + | # IT Department |
# Hull University | # Hull University | ||
# | # | ||
| − | # Written by DBird 25/12/ | + | # Written by DBird 25/12/2020 |
# ---------------- Modules ------------------------------------------ | # ---------------- Modules ------------------------------------------ | ||
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|style="width:5%; border-width: 0" | [[File:icon_exclam3.png]] | |style="width:5%; border-width: 0" | [[File:icon_exclam3.png]] | ||
|style="width:95%; border-width: 0" | This program does not contain any MPI directives and is shown simply for demonstrative purposes. | |style="width:95%; border-width: 0" | This program does not contain any MPI directives and is shown simply for demonstrative purposes. | ||
| − | Although PERL does support MPI, | + | Although PERL does support MPI, its implementation is quite limited compared to C, C++, and Fortran. |
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|} | |} | ||
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==== MPI program ==== | ==== MPI program ==== | ||
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#!/usr/bin/env perl | #!/usr/bin/env perl | ||
# | # | ||
| − | # | + | # HPC |
| − | # | + | # IT Department |
# Hull University | # Hull University | ||
# | # | ||
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#SBATCH -p compute | #SBATCH -p compute | ||
#SBATCH --exclusive | #SBATCH --exclusive | ||
| + | #SBATCH --mail-user= your email address here | ||
echo $SLURM_JOB_NODELIST | echo $SLURM_JOB_NODELIST | ||
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<pre style="background-color: black; color: white; border: 2px solid black; font-family: monospace, sans-serif;"> | <pre style="background-color: black; color: white; border: 2px solid black; font-family: monospace, sans-serif;"> | ||
[username@login01 ~]$ sbatch demoPERL.job | [username@login01 ~]$ sbatch demoPERL.job | ||
| − | Submitted batch job | + | Submitted batch job 4289352 |
</pre> | </pre> | ||
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* [https://www.tutorialspoint.com/perl/index.htm https://www.tutorialspoint.com/perl/index.htm] | * [https://www.tutorialspoint.com/perl/index.htm https://www.tutorialspoint.com/perl/index.htm] | ||
* [https://www.perl.org/ https://www.perl.org/] | * [https://www.perl.org/ https://www.perl.org/] | ||
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Latest revision as of 11:18, 23 March 2023
Contents
Programming Details
Perl is a family of high-level, general-purpose, interpreted, dynamic programming languages. The languages in this family presently are Perl 5 and Perl 6.
|
When programming with Perl in an HPC environment you will need to change the first line as shown below |
#!/usr/bin/perl
To
#!/usr/bin/env perl
Programming example
Non MPI program
#!/usr/bin/env perl
#
# HPC
# IT Department
# Hull University
#
# Written by DBird 25/12/2020
# ---------------- Modules ------------------------------------------
use strict; # perform error checking
# ---------------- Variables ----------------------------------------
my ($i);
# -------------------------------------------------------------------
# ---------------- Main Program -------------------------------------
# -------------------------------------------------------------------
for($i = 0; $i < 1000; $i++)
{
print "A-->$i\n";
}
# ---------------- finish up and exit -------------------------------
exit;
|
This program does not contain any MPI directives and is shown simply for demonstrative purposes.
Although PERL does support MPI, its implementation is quite limited compared to C, C++, and Fortran. |
MPI program
#!/usr/bin/env perl
#
# HPC
# IT Department
# Hull University
#
# Written by DBird 25/12/2017
use Parallel::MPI::Simple;
MPI_Init();
my $rank = MPI_Comm_rank(MPI_COMM_WORLD);
if ($rank == 1)
{
my $msg = "Hello, I'm $rank";
MPI_Send($msg, 0, 123, MPI_COMM_WORLD);
}
else
{
my $msg = MPI_Recv(1, 123, MPI_COMM_WORLD);
print "$rank received: '$msg'\n";
}
MPI_Finalise();
exit;
Running the program
The program could be executed in the following way for test purposes on the login node:
[username@login01 ~]$ module add perl/5.24.0 [username@login01 ~]$ perl testPerl.pl
Batch example
#!/bin/bash #SBATCH -J openPERL-node #SBATCH -N 1 #SBATCH --ntasks-per-node 20 #SBATCH -o %N.%j.%a.out #SBATCH -e %N.%j.%a.err #SBATCH -p compute #SBATCH --exclusive #SBATCH --mail-user= your email address here echo $SLURM_JOB_NODELIST module purge module add perl/5.24.0 export I_MPI_DEBUG=5 export I_MPI_FABRICS=shm:tmi export I_MPI_FALLBACK=no perl /home/user/PERL/demoPERL.pl
[username@login01 ~]$ sbatch demoPERL.job Submitted batch job 4289352