Testing utilization tracking

Before you begin to track the compiler usage for all users in your organization, you can test the feature with a limited number of users or with a separate compiler installation. During this testing, you can try different configurations so as to decide the best setup for your organization.

Testing with a limited number of users

To enable compiler utilization tracking for a limited number of users, you can use a separate utilization tracking configuration file and ask only these users to use the file. Other users of the same installation use the default utilization tracking configuration file in which utilization tracking is disabled, and their use of the compiler is therefore not recorded.

The default compiler configuration file, vac.cfg.53 or vac.cfg.61 contains two entries, xlurt_cfg_path and xlurt_cfg_name, which specify the location of the utilization tracking configuration file. You need to perform the following tasks to let the specified users use the separate utilization tracking configuration file:

Create a separate compiler configuration file or stanza, in which the xlurt_cfg_path and xlurt_cfg_name entries specify the location of the utilization tracking configuration file you want to use.
Ask these users to use the following compiler option or environment variable to instruct the compiler to use the separate compiler configuration file or stanza, which in turn allows them to use the separate utilization tracking configuration file.
- The -F option
- The XLC_USR_CONFIG environment variable

Note: This approach is only for testing the utilization tracking feature. Do not use it for tracking all compiler utilization in your organization unless you can ensure that all compiler invocations are done with the -F option or the XLC_USR_CONFIG environment variable set.

Testing with a separate compiler installation

You can install a separate instance of the compiler for testing utilization tracking. In this case, you can directly modify the utilization tracking configuration file in that installation to enable and configure utilization tracking. The compiler users involved in the testing do not need to perform any task for the tracking.

When you are satisfied that you have found the best utilization tracking configuration for your organization, you can enable it for all compiler users in your organization.

Related information

Configuring utilization tracking