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Illustrate the basic structure of the von Neumann machine
The following figure shows basic structure of the von Neumann machine. A von Neumann machine has only a single path between control unit (CU) and the main memory. This constraint / feature is referred to von Neumann bottle neck. Various other architectures have been suggested for the modern computers von Neumann Machine.
• Attributed to the John von Neumann• Treats both Program and Data equally• One port to Memory. Simplified Hardware• "von Neumann Bottleneck" (rate at which data and program can get inside the CPU is limited by bandwidth of the interconnect)
Loop Level At this stage, following loop iterations are candidates for parallel execution. Though, data dependencies among subsequent iterations can restrict parallel execution
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Write Hit Policies: Write through o Update next level on every write o Cache is always clean o A lots of traffic to next level (mostly write) Write
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