The hardware model describes the details of the target hardware with information the compiler needs to construct the software. The core information about the architecture is:

• CPUs
• Memories
• Shared, hierarchical, distributed
• Alignment characteristics
• Interconnect
• Socket, DMA, shared memory, broadcast
• Heterogeneous and hierarchical collection of cores, memories, and CPUs

Architectural characteristics are described at a level required to construct the software. This description of the architectural characteristics enables scalability and portability.

The execution can be simulated at the same level – making simulation efficient and accurate. The simple software and hardware stack enables accurate simulation. This is borne out with use of Gedae simulator during the support of production programs.

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