HP 3000 Manuals HP 3000 Manuals
Chapter 1 Introduction HP Software Performance Tuner/XL (HP SPT/XL) is a software tool used to monitor and report system resources used by application programs. HP SPT/XL provides the information you need to optimize the performance of your MPE XL native mode applications. With HP SPT/XL you can evaluate the design of applications in terms of their system resource requirements. You can measure the effects of changes to the application, and quickly compare current resource use with past use. Combined with system-level performance management, HP SPT/XL will helpyou achieve maximum computer system efficiency. Traditional code profilers focus on the time central processing unit (CPU) operates and the number of instructions executed. In addition to these traditional sampling techniques, HP SPT/XL also recognizes and addresses the application tuner's need to break a program's overall performance into logical units of work. HP SPT/XL bases its analysis on a unit of work called a transaction. To HP SPT/XL, a transaction begins with a program call to an intrinsic. A transaction that begins with an FREAD from a terminal is a simple, but common, example, but you can begin transactions with other intrinsics chosen from an extensive list. Each time HP SPT/XL sees the transaction, all the resources the program uses until the next transaction event are associated with that transaction. If you do not choose any transactions, the entire program is considered a single transaction. This flexible method of defining transactions allows you to analyze your program the way users partition their work. HP SPT/XL reports the following performance information: * CPU use * Wait times (disk, memory, software locks) * File system and HP TurboIMAGE activity * Intrinsic use * Transaction response times and transaction counts