Interactive parallel jobs using MPI
This page provides three examples of running interactive
distributed-memory parallel jobs that use MPI for message passing.
The include a "hello, world" example program written in F90, C, and
C++ to demonstrate how it is run as an interactive MPI job.
The example code is available in lightning under:
/usr/local/examples/interactive/mpi/f90.
This directory contains a "hello, world" example
program written in F90 to demonstrate running it
as an interactive MPI job. If you type:
make
it will first compile using command
mpif90 hello.f90
if not already compiled and then run the executable
(a.out) using command:
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
The explanation of options used in above LSF commands:
-I
For interactive job, where stdout and stderr of
running LSF jobs are connected to user's stdout/stderr.
-q debug
Run it in quene named "debug"
-W 0:05
Set wall clock limit of 5 minutes.
-n 4
Schedule 4 tasks, using default 2 tasks/host.
"mpirun.lsf ./a.out"
Run the command to lauch the executable "a.out".
===============
Typical output
===============
echo "Compiling --- "
Compiling ---
mpif90 hello.f90 ; rm -f hello.o
echo ""
echo "Running interactively --- "
Running interactively ---
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
Job <149009> is submitted to queue .
<>
<>
Hello from task--> 0 / 4 ran on ln0129en
Hello from task--> 2 / 4 ran on ln0133en
Hello from task--> 1 / 4 ran on ln0129en
Hello from task--> 3 / 4 ran on ln0133en
Job /usr/local/lsf/6.2/linux2.6-glibc2.3-x86_64/bin/gmmpirun_wrapper
./a.out
TID HOST_NAME COMMAND_LINE STATUS TERMINATION_TIME
=== ========== ============ ====== ===================
00000 ln0129en ./a.out Done 08/07/2006 15:56:54
00001 ln0129en ./a.out Done 08/07/2006 15:56:54
00002 ln0133en ./a.out Done 08/07/2006 15:56:55
00003 ln0133en ./a.out Done 08/07/2006 15:56:55
--------------------------------------------------------------
The example code is available in lightning under:
/usr/local/examples/interactive/mpi/c.
This directory contains a "hello, world" example
program written in C to demonstrate running it
as an interactive MPI job. If you type:
make
it will first compile using command
mpicc hello.c
if not already compiled and then run the executable
(a.out) using command:
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
The explanation of options used in above LSF commands:
-I
For interactive job, where stdout and stderr of
running LSF jobs are connected to user's stdout/stderr.
-q debug
Run it in quene named "debug"
-W 0:05
Set wall clock limit of 5 minutes.
-n 4
Schedule 4 tasks, using default 2 tasks/host.
"mpirun.lsf ./a.out"
Run the command to lauch the executable "a.out".
=================
Typical output
=================
echo "Compiling --- "
Compiling ---
mpicc hello.c ; rm -f hello.o
echo ""
echo "Running interactively --- "
Running interactively ---
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
Job <149007> is submitted to queue .
<>
<>
---Hello from task--> 1 / 4, ran on ln0134en
---Hello from task--> 2 / 4, ran on ln0128en
---Hello from task--> 3 / 4, ran on ln0128en
---Hello from task--> 0 / 4, ran on ln0134en
Job /usr/local/lsf/6.2/linux2.6-glibc2.3-x86_64/bin/gmmpirun_wrapper
./a.out
TID HOST_NAME COMMAND_LINE STATUS TERMINATION_TIME
===== ========== ============ ====== ===================
00000 ln0134en ./a.out Done 08/07/2006 15:55:31
00001 ln0134en ./a.out Done 08/07/2006 15:55:31
00002 ln0128en ./a.out Done 08/07/2006 15:55:31
00003 ln0128en ./a.out Done 08/07/2006 15:55:31
---------------------------------------------------------------------
The example code is available in lightning under:
/usr/local/examples/interactive/mpi/c++.
This directory contains a "hello, world" example
program written in C++ to demonstrate running it
as an interactive MPI job. If you type:
make
it will first compile using command
mpiCC hello.c
if not already compiled and then run the executable
(a.out) using command:
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
The explanation of options used in above LSF commands:
-I
For interactive job, where stdout and stderr of
running LSF jobs are connected to user's stdout/stderr.
-q debug
Run it in quene named "debug"
-W 0:05
Set wall clock limit of 5 minutes.
-n 4
Schedule 4 tasks, using default 2 tasks/host.
"mpirun.lsf ./a.out"
Run the command to lauch the executable "a.out".
==============
Typical Output
==============
echo "Compiling --- "
Compiling ---
mpiCC hello.C ; rm -f hello.o hello.ti
echo ""
echo "Running interactively --- "
Running interactively ---
bsub -I -q debug -W 0:05 -n 4 "mpirun.lsf ./a.out"
Job <149006> is submitted to queue .
<>
<>
------Hello from task-->0/4 ran--Hello from task-->1/4 ran on ln013 on
ln0132en
--Hello from task-->3/4 ran on ln0130en
--Hello from task-->2/4 ran on ln0130en
2en
Job /usr/local/lsf/6.2/linux2.6-glibc2.3-x86_64/bin/gmmpirun_wrapper
./a.out
TID HOST_NAME COMMAND_LINE STATUS TERMINATION_TIME
===== ========== ============ ====== ===================
00001 ln0132en ./a.out Done 08/07/2006 15:54:38
00000 ln0132en ./a.out Done 08/07/2006 15:54:38
00003 ln0130en ./a.out Done 08/07/2006 15:54:38
00002 ln0130en ./a.out Done 08/07/2006 15:54:38
------------------------------------------------------------------
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