Using AutoStrobe to Measure New and Changed Load Modules

AutoStrobe provides a utility called AutoMeasure that automatically measures new and changed load modules. AutoMeasure gives you a quick way to determine whether code changes have altered an application’s performance. You can use AutoMeasure to look for new and changed load modules, and to initiate a measurement the next time the target job step executes. Comparing the Performance Profile generated with those from previous Strobe measurements can help you ensure that your application’s performance is maintained across updates.

AutoMeasure builds a list of load modules for Strobe to measure, using the load libraries and the link-edit dates that you specify. This list of load modules is called the AutoMeasure list.

To build the AutoMeasure list:

1. Specify the criteria for building the AutoMeasure list:
   • The names of the load libraries in which the target load modules reside
   • A date that specifies the first day on which AutoMeasure considers a load module to be new or changed.
2. Invoke the AutoMeasure utility to:
   • Scan the load libraries that meet your criteria
   • Create a list of names of the eligible load modules to be automatically measured the first time they execute.

The rest of the section describes how to use the AutoStrobe AutoMeasure utility: