Memory databus utilization management system and computer program product

A computer program product for memory management, the computer program product comprising:

• a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising computer readable program code configured to:
• analyze memory databus utilization by each of a plurality of processors compared to a memory databus utilization threshold set for each respective processor, the memory databus utilization thresholds set to maintain a memory databus utilization for a data processing system at or below a system memory databus utilization threshold, wherein the memory databus utilization threshold for each respective processor is a quantity of memory accesses within a time window of a certain quantity of memory clock cycles;
• and
• in response to determining that memory databus utilization for at least one of the processors is below its respective threshold, reallocate at least a portion of unused databus utilization from the at least one processor to at least one of the other processors by increasing the memory databus utilization threshold of the at least one of the other processors, wherein the memory databus utilization data are memory clock cycles currently utilized divided by the certain quantity of memory clock cycles within the time window.

A system comprising:

• a plurality of processors;
• a plurality of memory units, each memory unit accessible by at least one of the processors;
• a plurality of memory controllers, each memory controller configured to manage accesses to a respective memory unit by a respective processor managed by a respective memory controller;
• and
• a service processor comprising a management module configured to set for each of the plurality of processors a databus utilization threshold for utilizing a databus for accessing a respective memory unit by a respective processor to maintain a memory databus utilization of the system at or below a system threshold, the databus utilization threshold defining a quantity of accesses to a respective memory unit by a respective processor within a defined time window of a certain quantity of memory clock cycles;
• and
• wherein each memory controller is configured to receive a respective databus utilization threshold for the respective processor managed by the respective memory controller and manage accesses to a respective memory unit by a respective managed processor according to the databus utilization threshold set for the respective processor;
• and
• wherein the management module is configured to receive memory databus utilization data from the respective memory controllers indicating utilization of a respective databus by a respective processor and programmed to, in response to determining that utilization of a respective databus for at least one of the processors is below its respective threshold, reallocate at least a portion of unused databus utilization from the at least one processor to at least one of the other processors by increasing the memory databus utilization threshold of the at least one of the other processors, wherein the memory databus utilization data are memory clock cycles currently utilized divided by the certain quantity of memory clock cycles within the time window.