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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.
 
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.
 +
{|
 +
|style="width:5%; border-width: 0" | [[File:icon_pencil.png]]
 +
|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
 +
|-
 +
|}
 +
<pre style="background-color: #f5f5dc; color: black; font-family: monospace, sans-serif;">
  
−
When programming with Perl in a HPC environment you will need to change the first line from:
+
#!/usr/bin/perl
  
−
<pre style="background-color: #C8C8C8; color: black; border: 2px solid black; font-family: monospace, sans-serif;">
 
−
#!/usr/bin/perl
 
 
</pre>
 
</pre>
  
 
To  
 
To  
  
−
<pre style="background-color: #C8C8C8; color: black; border: 2px solid black; font-family: monospace, sans-serif;">
+
<pre style="background-color: #f5f5dc; color: black; font-family: monospace, sans-serif;">
 +
 
 
  #!/usr/bin/env perl
 
  #!/usr/bin/env perl
 +
 
</pre>
 
</pre>
  
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==== Non MPI program ====
 
==== Non MPI program ====
  
−
<pre style="background-color: #C8C8C8; color: black; border: 2px solid green; font-family: monospace, sans-serif;">
+
<pre style="background-color: #f5f5dc; color: black; font-family: monospace, sans-serif;">
  
 
#!/usr/bin/env perl
 
#!/usr/bin/env perl
 
#
 
#
−
# VIPER - HPC
+
# HPC
−
# ICTD Department
+
# IT Department
 
# Hull University
 
# Hull University
 
#
 
#
−
# Written by DBird 25/12/2017
+
# Written by DBird 25/12/2020
  
 
# ---------------- Modules ------------------------------------------
 
# ---------------- Modules ------------------------------------------
Line 53: Line 59:
  
 
</pre>
 
</pre>
−
 
+
{|
−
<strong>Note</strong> this program does not contain any MPI directives and is shown simply for demonstrative purposes.  
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|style="width:5%; border-width: 0" | [[File:icon_exclam3.png]]
−
Although PERL does support MPI, it's implementation is quite limited compared to C, C++ and Fortran.
+
|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, its implementation is quite limited compared to C, C++, and Fortran.
 +
|-
 +
|}
  
 
==== MPI program ====
 
==== MPI program ====
  
−
<pre style="background-color: #C8C8C8; color: black; border: 2px solid green; font-family: monospace, sans-serif;">
+
<pre style="background-color: #f5f5dc; color: black; font-family: monospace, sans-serif;">
  
 
#!/usr/bin/env perl
 
#!/usr/bin/env perl
 
#
 
#
−
# VIPER - HPC
+
# HPC
−
# ICTD Department
+
# IT Department
 
# Hull University
 
# Hull University
 
#
 
#
Line 95: Line 104:
 
<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 ~]$  module load perl/5.24.0
+
[username@login01 ~]$  module add perl/5.24.0
 
[username@login01 ~]$  perl testPerl.pl
 
[username@login01 ~]$  perl testPerl.pl
  
 
</pre>
 
</pre>
  
−
= Batch example =
+
== Batch example ==
 +
 
 +
 
 +
<pre style="background-color: #C8C8C8; color: black; border: 2px solid #C8C8C8; font-family: monospace, sans-serif;">
  
−
<pre style="background-color: #C8C8C8; color: black; border: 2px solid blue; font-family: monospace, sans-serif;">
 
 
#!/bin/bash
 
#!/bin/bash
  
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#SBATCH -N 1
 
#SBATCH -N 1
 
#SBATCH --ntasks-per-node 20
 
#SBATCH --ntasks-per-node 20
−
#SBATCH -D /home/user/PERL
 
 
#SBATCH -o %N.%j.%a.out
 
#SBATCH -o %N.%j.%a.out
 
#SBATCH -e %N.%j.%a.err
 
#SBATCH -e %N.%j.%a.err
 
#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
  
 
module purge
 
module purge
−
module load perl/5.24.0
+
module add perl/5.24.0
  
 
export I_MPI_DEBUG=5
 
export I_MPI_DEBUG=5
Line 130: Line 141:
 
<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 289352
+
Submitted batch job 4289352
 
</pre>
 
</pre>
  
−
[[Category:Programming]]
+
== Further Information ==
 +
 
 +
* [https://en.wikipedia.org/wiki/Perl https://en.wikipedia.org/wiki/Perl]
 +
* [https://www.tutorialspoint.com/perl/index.htm https://www.tutorialspoint.com/perl/index.htm]
 +
* [https://www.perl.org/ https://www.perl.org/]
 +
 
 +
{{Languagespagenav}}

Latest revision as of 11:18, 23 March 2023

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.

Icon pencil.png 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;
Icon exclam3.png 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

Further Information





Languages | Main Page | Further Topics

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