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Phase 3 - Two Parameters

Having proved the concept of pre-initialisation and seen the performance benefits, it it time to explore passing data to and fro between REXX and the HLL program.

A second parameter was added to the LINKPGM instruction; the first controls the processing within ASMPIPI2, while the second is used to pass data to, and received data from the HLL program invoked by ASMPIPI2..

Phase 3 - Add a second parameter to LINKPGM

Below are the links to the elements used to establish the benchmark environment.

• The REXX routine used as the driver.
  
  This REXX routine is similar to that in Phase 2 except that a second parameter has been added to the LINKPGM instruction within the DO loop.
  
  
• The Assembler program invoked from REXX
  
  Similar to ASMPIPI, in Phase 2, but this time passing a parameter to the COBOL program for updating.
  
  
• The COBOL program invoked by the Assembler interface
  
  Simple program to retrieve and update a parameter to be passed back to REXX.
  
  
• The Job Control Language (JCL) used for the test.
  
  Batch jobs were used for all test runs to aid debugging as and when necessary.