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The memory system is a fundamental performance and energy bottleneck in almost all computing systems. Recent system design, application, and technology trends that require more capacity, bandwidth, efficiency, and predictability out of the memory system make it an even more important system bottleneck [103, 110]. At the same time, DRAM technology is experiencing difficult technology scaling challenges...
This work proposes a new, software-based, defect detection and diagnosis technique. We introduce a novel set of instructions, called access-control extensions (ACE), that can access and control the microprocessor's internal state. Special firmware periodically suspends microprocessor execution and uses the ACE instructions to run directed tests on the hardware. When a hardware defect is present, these...
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