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- W2791556965 abstract "A tightly coupled heterogeneous core (TCHC) has heterogeneous execution units with different characteristics inside the core. The composite core (CC) and the front-end execution architecture (FXA) are examples of state-of-the-art TCHCs. These TCHCs have in-order and out-of-order execution units in the core. They selectively execute instructions in-order and it improves the energy efficiency without significant performance degradation compared to out-of-order execution. However, these TCHCs cannot improve the energy efficiency sufficiently. CC has a large switching penalty of the execution units, and thus, CC cannot sufficiently execute instructions in-order. FXA cannot suspend energy consuming out-of-order execution units when it executes instructions in-order. We propose a dual-mode frontend execution architecture (DM-FXA), which is based on the FXA. DM-FXA has our proposed low-power execution mode, which completely suspends the out-of-order execution unit on in-order execution, and thus, DM-FXA consumes less energy than does the FXA. In addition, DM-FXA has a smaller switching penalty than CC. In our evaluation, the proposed methods reduce energy consumption by 34.7% compared with a conventional out-of-order processor, and performance degradation is within 3.2%." @default.
- W2791556965 created "2018-03-29" @default.
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- W2791556965 date "2018-01-01" @default.
- W2791556965 modified "2023-09-27" @default.
- W2791556965 title "A Tightly Coupled Heterogeneous Core with Highly Efficient Low-Power Mode" @default.
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- W2791556965 doi "https://doi.org/10.1007/978-3-319-77610-1_16" @default.
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