Method and system of determining attributes of a functional unit in a multiple processor computer system

A computer system comprising:

• a first processor coupled to a first random access memory (RAM), the first processor and first RAM forming a first resource affinity domain (RAD);
• a second processor coupled to a second RAM, the second processor and second RAM forming a second RAD, and wherein the second processor is coupled to the first processor;
• a RAD specific attribute of the first RAD along with a replicated portion of an operating system stored in the first RAM, wherein the replicated portion of the operating system, when executing in the first RAD, reads the RAD specific attribute of the first RAD by reference to a virtual memory address;
• and
• a RAD specific attribute of the second RAD along with a replicated portion of the operating system stored in the second RAM, wherein the replicated portion of the operating system, when executing in the second RAD, reads the RAD specific attribute of the second RAD by reference to the virtual memory address, wherein a first page table in the first RAD and a second page table in the second RAD each contain an entry corresponding to the virtual memory address, and the RAD specific attribute is a RAD identifier.

Computer readable media comprising an executable program that, when executed, implements a method comprising:

• reading a functional unit identifier from a random access memory (RAM) coupled to a processor in which the program executes;
• determining within which functional unit, identified by the functional unit identifier, the program is executing;
• addressing data at a same virtual address by different processors in different functional units, wherein each processor in a different functional unit reads different data specific to its functional unit for the same virtual address;
• and
• addressing data at a second same virtual address by the different processors in the different functional units, wherein the second same virtual address in each of the different functional units points to a same physical address, wherein the executable program further comprises scheduling a program to execute on the processor in the functional unit.