Method for performance monitoring using a redundancy tracking register

A system for performance monitoring, the system comprising:

• a processor configured to:
• detect, by a redundancy register, a change to a counter value corresponding to one of a plurality of hardware counters, wherein the redundancy register comprises a plurality of memory locations;
• store, in each of the plurality of memory locations, a value indicating that the change was detected for the counter value corresponding to the plurality of hardware counters, wherein each of the plurality of hardware counters correspond to one of the plurality of memory locations;
• perform a read operation on a subset of the plurality of hardware counters, by a memory, wherein members of the subset of the plurality of hardware counters are determined based upon the value indicating that the change was detected for the counter value corresponding to the plurality of hardware counters;
• and
• reset the value stored in all the plurality of memory locations to a default value after performance of the read operation.

A computer program product for performance monitoring, the computer program product comprising:

• a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
• detecting, by a redundancy register, a change to a counter value corresponding to one of a plurality of hardware counters, wherein the redundancy register comprises a plurality of memory locations;
• storing, in each of the plurality of memory locations, a value indicating that the change was detected for the counter value corresponding to the plurality of hardware counters, wherein each of the plurality of hardware counters correspond to one of the plurality of memory locations;
• performing a read operation on a subset of the plurality of hardware counters, by a memory, wherein members of the subset of the plurality of hardware counters are determined based upon the value indicating that the change was detected for the counter value corresponding to the plurality of hardware counters;
• and
• resetting the value stored in all the plurality of memory locations to a default value after performance of the read operation.