Running PADE: A Tutorial

PADE is intended to be an intuitive graphical user interface for developing parallel applications on a virtual machine. The typical use of PADE consists of the following steps:

1. Initiate the virtual machine using the PVM button.
2. Construct the PADE data using the Setup button or Graph button.
3. Distribute and compile the application using the PVMmake button.
4. Run the application using the Apps button.
5. Edit files, redistribute modified files, and repeat the cycle as necessary.

In this chapter we go through an example of this process using the manager/worker program in the examples subdirectory of the PADE distribution. This program is a variation of one of the examples contained in the PVM distribution. The files located in the examples subdirectory are:

• manager.c -- A slightly modified version of the master.c program provided with the PVM software.

• worker.c -- A slightly modified version of the slave.c program provided with the PVM software.

• makefile.mw -- A generic makefile that can be used to compile the manager.c and worker.c source files. A modified copy of this makefile will be needed for each architecture/file-system combination of the user's virtual machine.

• pade_setenv -- A script that can be executed to set the environment variables and directory paths that are needed in order for PADE to run. This file assumes the user is running either the csh or tcsh shell.

• pade_export -- A script similar to pade_setenv except that it assumes the user is running either the sh, ksh, or bash shell.

• mw -- An example PADE data file used to compile the source files.

• mw.pvmmake -- The PVMmake config file corresponding to the mw PADE data file.

• pvmmake.output -- An example of the output from running PVMmake to compile the manager/worker example.

• mw_make_clean -- An example PADE data file used to remove the executable and object files created on all virtual machine nodes during compilation of the manager/worker example program.

• mw_make_clean.pvmmake -- The PVMmake config file corresponding to the mw_make_clean PADE data file.

• mw_run -- An example PADE data file used to execute the manager/worker program using PVMmake .

• mw_run.pvmmake -- The PVMmake command file corresponding to the mw_run PADE data file.

The manager.c and worker.c source files need not be modified by the user. The user will need to make several copies of makefile.mw , possibly one for each node on the virtual machine, and modify each appropriately. The PADE data files and corresponding PVMmake files are provided only as examples and will not be needed by the user.

• Example PADE Session
  • Starting PADE
  • Starting the Virtual Machine
  • Entering Host Names
  • Entering Host Commands via Setup
  • Entering Host Commands via Graph
  • Entering Files via Setup
  • Entering Files using Graph
  • Saving the Setup Information
  • Running PVMmake
  • Running the Application in a Terminal Window
  • Running the Application Using PVMmake
  • Exiting PADE
• Other PVMmake config files