Performance-based reallocating of logical processing units to sockets of a computer system

A system for reallocating processing units, the system comprising:

• a memory;
• and
• a processing circuit communicatively coupled with the memory, wherein the system performs a method comprising:
• reallocating a logical processing unit within a multiprocessor computer system, the logical processing unit being one logical processing unit of multiple logical processing units backed by a socket of a plurality of sockets of the multiprocessor computer system, the reallocating comprising:
• monitoring, during execution of program code of the multiple logical processing units, a performance metric of a hardware resource of the socket, the hardware resource being shared by the multiple logical processing units;
• reassigning the logical processing unit, based on the monitoring, to a different socket of the plurality of sockets of the multiprocessor computer system to, in part, improve the performance metric of the hardware resource of the socket, the reassigning comprising reassigning the logical processing unit based on the monitoring determining that a differential between a resource utilization rate of the socket and a resource utilization rate of the different socket exceeds a set threshold;
• and
• wherein the monitoring further comprises identifying, for the plurality of sockets, a socket of the plurality of sockets having a highest resource utilization rate of the hardware resource as a source socket, and identifying, for the plurality of sockets, a socket of the plurality of sockets having a lowest resource utilization rate of the hardware resource as a target socket.

A computer program product for reallocating processing units, the computer program product comprising:

• a computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
• reallocating a logical processing unit within a multiprocessor computer system, the logical processing unit being one logical processing unit of multiple logical processing units backed by a socket of a plurality of sockets of the multiprocessor computer system, the reallocating comprising:
• monitoring, during execution of program code of the multiple logical processing units, a performance metric of a hardware resource of the socket, the hardware resource being shared by the multiple logical processing units;
• reassigning the logical processing unit, based on the monitoring, to a different socket of the plurality of sockets of the multiprocessor computer system to, in part, improve the performance metric of the hardware resource of the socket, the reassigning comprising reassigning the logical processing unit based on the monitoring determining that a differential between a resource utilization rate of the socket and a resource utilization rate of the different socket exceeds a set threshold;
• and
• wherein the monitoring further comprises identifying, for the plurality of sockets, a socket of the plurality of sockets having a highest resource utilization rate of the hardware resource as a source socket, and identifying, for the plurality of sockets, a socket of the plurality of sockets having a lowest resource utilization rate of the hardware resource as a target socket.