Interval Profile Dumping

The _PGOPTI_Set_Interval_Prof_Dump() function activates Interval Profile Dumping and sets the approximate frequency at which dumps occur. The prototype of the function call is:

void _PGOPTI_Set_Interval_Prof_Dump(int interval);

This function is used in non-terminating applications.

The interval parameter specifies the time interval at which profile dumping occurs and is measured in milliseconds. For example, if interval is set to 5000, then a profile dump and reset will occur approximately every 5 seconds. The interval is approximate because the time-check controlling the dump and reset is only performed upon entry to any instrumented function in your application.


  1. Setting interval to zero or a negative number will disable interval profile dumping.

  2. Setting a very small value for interval may cause the instrumented application to spend nearly all of its time dumping profile information. Be sure to set interval to a large enough value so that the application can perform actual work and substantial profile information is collected.

Recommended usage

This function may be called at the start of a non-terminating user application, to initiate Interval Profile Dumping. Note that an alternative method of initiating Interval Profile Dumping is by setting the environment variable, PROF_DUMP_INTERVAL, to the desired interval value prior to starting the application.

The intention of Interval Profile Dumping is to allow a non-terminating application to be profiled with minimal changes to the application source code.