The HPSUMMARY Procedure


PERFORMANCE performance-options ;

The PERFORMANCE statement defines performance parameters for multithreaded and distributed computing, passes variables that describe the distributed computing environment, and requests detailed results about the performance characteristics of the HPSUMMARY procedure.

You can also use the PERFORMANCE statement to control whether PROC HPSUMMARY executes in single-machine or distributed mode.

It is important to remember the distinction between the NODES= and NTHREADS= options. The NODES= option specifies the number of separate grid nodes that participate in the PROC HPSUMMARY execution, and the NTHREADS= option influences how many threads are used by the HPSUMMARY procedure instance that runs on each node. If the data are located on the grid, then all nodes must be engaged; therefore, the NODES= option might be overridden. Specifying NODES=0 causes PROC HPSUMMARY to execute in single-machine mode only. Setting the NTHREADS= option to a value that is greater than the CPU count on each grid node is not likely to improve overall throughput.

The PERFORMANCE statement is documented further in the section PERFORMANCE Statement of Chapter 3: Shared Concepts and Topics.