System, method, and article of manufacture for dynamically profiling memory transfers in a program

摘要

A system, method and article of manufacture are provided for recording memory transfers required by an executing application. A memory of a system hosting an application is divided into micropages (small ranges of memory). A memory map of the application is maintained. The map records which functions have valid copies of micropages. The map is checked to determine which functions have a valid copy of the data when a current function reads for a micropage. A transfer of the data from another function to the current function is recorded if the current function does not have a valid copy of the data. The map is updated to reflect that the current function has a valid copy of the micropage if the data is transferred from another function. A write to a micropage is recorded. The map is updated to reflect that the current function has the only valid copy of a micropage when a write to the micropage occurs. A report of data transfers among the functions is output.