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- W2012102234 abstract "Design of memory systems for decoupled architectures is the theme of this dissertation. The decoupled architecture uses hardware queues to architecturally decouple memory request generation from algorithmic computation. This results in an implementation that has two separate instruction streams that communicate via hardware queues. Thus, performance is improved through parallelism and efficient memory referencing.Techniques for increasing memory bandwidth and algorithms for servicing memory requests are incorporated into the memory system designs within these two constraints: (1) the operands placed in the hardware queue must be in the correct order, and (2) the needed operands are the only operands that can be placed in the hardware queue.Techniques such as pipelining, interleaving, servicing requests out of arrival order, and cache memory are investigated. Two strategies for servicing memory requests are studied: (1) to service requests according to their priorities, and (2) to minimize the total request service time. For the first strategy, the priority of each request type is derived from the characteristics of memory reference and possible bottleneck during decoupled computations. The second strategy results in a request scheduling policy, Free-Module-Request-First, that is proven to be able to minimize the total request service time.A sequence control scheme must be used with the Free-Module-Request-First scheduling policy in order to deliver the memory outputs to the hardware queue in the correct order. This sequence control scheme is also used to track cache hits and misses, so that a data cache can be implemented in the memory system without difficulty.The designed data cache can not only support flexible fetch and replacement cache algorithms, it can also detect memory access hazards and short-circuit the Read-After-Write requests. Therefore, the penalty of memory access hazards can be greatly reduced.The combination of the designed data cache and the pipelined interleaved memory system using Free-Module-Request-First scheduling policy results in a high-performance memory system, that is capable of servicing memory requests nearly no conflict delay under the particular workload defined in the trace files." @default.
- W2012102234 created "2016-06-24" @default.
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- W2012102234 date "1985-01-01" @default.
- W2012102234 modified "2023-09-28" @default.
- W2012102234 title "Design of pipelined memory systems for decoupled architectures" @default.
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