05_mpi-openmp/01_vcoord

Hands-on: Rank allocation with vcoordfile in Fujitsu MPI

• Choose either C/C++ (c) or Fortran (fortran) samples. Both of them are fine, as well.

C/C++

How to compile and how to execute

1. Compile program

• The executable file (run.x) is generated in c/.

$ cd c
$ make  # make -f Makefile.own # if using own compiler
$ ls
run.x ...

2. Run program

• We have two settings of jobs; results/default and results/vcoord.
  • default: Standard rank allocation using the job scheduler. Number of nodes = 2, Process-per-node=4, Number of threads=12
  • vcoord : Rank allocation using vcoordfile (vcoord). Number of nodes = 2. Other settings are controlled by vcoord.
• You can run the program either:

## To run as a batch job
$ cd c/results/default
$ pjsub task.sh 
## Or, to run in an interactive job
$ cd c/results/default
$ bash task.sh  

• The jobs in the Exercises will be completed within 1 minutes.
  • For safety, we set the elapsed time of the job scripts as 3 minutes.

Exercises A

• E1: Check the rank allocation in results/default, using the job statistical information file (*.stats) and the standard output/error files.
• E2: Check the vcoordfile (vcoord) in results/vcoord. How many MPI tasks are allocated in each of nodes? What about the number of OpenMP threads per MPI task?
• E3: Check the rank allocation in results/vcoord.

Fortran

How to compile and how to execute

1. Compile program

• The executable file (run.x) is generated in fortran/.

$ cd fortran
$ make  # make -f Makefile.own # if using own compiler
$ ls
run.x ...

2. Run program

• We have two settings of jobs; results/default and results/vcoord.

  • default: Standard rank allocation using the job scheduler. Number of nodes = 2, Process-per-node=4, Number of threads=12
  • vcoord : Rank allocation using vcoordfile (vcoord). Number of nodes = 2. Other settings are controlled by vcoord.

• You can run the program either:

## To run as a batch job
$ cd fortran/results/default
$ pjsub task.sh 
## Or, to run in an interactive job
$ cd fortran/results/default
$ bash task.sh  

• The jobs in the Exercises will be completed within 1 minutes.
  • For safety, we set the elapsed time of the job scripts as 3 minutes.

Exercises A

• E1: Check the rank allocation in results/default, using the job statistical information file (*.stats) and the standard output/error files.
• E2: Check the vcoordfile (vcoord) in results/vcoord. How many MPI tasks are allocated in each of nodes? What about the number of OpenMP threads per MPI task?
• E3: Check the rank allocation in results/vcoord.