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A Two-Level Load/Store Queue Based on Execution Locality

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A Two-Level Load/Store Queue Based on Execution Locality
Multicore processors have emerged as a powerful platform on which to efficiently exploit thread-level parallelism (TLP). However, due to Amdahl’s Law, such designs will be increasingly limited by the remaining sequential components of applications. To overcome this limitation it is necessary to design processors with many lower–performance cores for TLP and some high-performance cores designed to execute sequential algorithms. Such cores will need to address the memory-wall by implementing kilo-instruction windows. Large window processors require large Load/Store Queues that would be too slow if implemented using current CAMbased designs. This paper proposes an Epoch-based Load Store Queue (ELSQ), a new design based on Execution Locality. It is integrated into a large-window processor that has a fast, out-of-order core operating only on L1/L2 cache hits and N slower cores that process L2 misses and their dependent instructions. The large LSQ is coupled with the slow cores and is ...
Miquel Pericàs, Adrián Cristal, Fran
Added 31 May 2010
Updated 31 May 2010
Type Conference
Year 2008
Where ISCA
Authors Miquel Pericàs, Adrián Cristal, Francisco J. Cazorla, Rubén González, Alexander V. Veidenbaum, Daniel A. Jiménez, Mateo Valero
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