Homogeneous and Heterogeneous Systems Sample Clauses

Homogeneous and Heterogeneous Systems. Any system including more than one processing element can be broadly categorized as either homogeneous or heterogeneous. Homogeneous Systems In a homogeneous system, all processing elements are identical and behave almost entirely as peers. (There may be a ”boot” element that has a special role at system startup, but once the system is running it is no longer special). This implies that the processing elements must be self-supervising; the OS runs on all processors and there is no intrinsic master/slave relationship between processors. It is possible for an OS to use the different processors in an asymmetric way (e.g. making all scheduling decisions or handling all peripheral interrupts on a single processor), but the OS must have a presence on each processor as there is no provision for external supervision. As all the processors are identical there is no need (or indeed opportunity) for software to adapt to different processor types; software just needs to be able to cope with running on several processors concurrently. Heterogeneous Systems A heterogeneous system contains more than one type of processor. The different processor types might have different execution models, memory models or in- struction sets. A heterogeneous system allows each processor type to be specialized to run a particular task or class of tasks. Usually there is a master/slave relationship where one processor or group of processors is responsible for supervising the activities of the others. This relieves the other processors of the need to run supervisory code such as an OS. Producing software for heterogeneous systems is a greater challenge; software must adapt at some level to the different processor types and arrange for different processors to run tasks that are suited to their specializations.
Sample 1
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Related to Homogeneous and Heterogeneous Systems

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