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首页> 外文会议>IEEE International Workshop on Signal Processing Systems >LoTTA: Energy-Efficient Processor for Always-On Applications
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LoTTA: Energy-Efficient Processor for Always-On Applications

机译：LoTTA：永远在线应用的节能处理器

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Various use cases in the era of Internet-of-Things (IoT) demand processor devices to have low energy consumption in order to maximize the battery life. In addition to energy constraints, there is often a need to both swiftly execute control-oriented code to provide low reaction times and to occasionally perform real time signal processing tasks efficiently. As a response to these requirements, we propose LoTTA, an extremely energy-efficient exposed datapath core. Its transport-triggered programming model helps in lowering the execution latency via low cost data forwarding. Control efficiency is achieved by an optimized control unit with zero delay slot branches and predicated execution. An instruction register file is included for frequently executed program hot spots to reduce the instruction stream energy consumption. These features allow the processor to execute CHStone and EEMBC CoreMark benchmarks on average with 19% fewer cycles compared to a 6-stage LM32, a traditional RISC core with similar datapath resources. The core consumes 53% less energy on average compared to the RISC core. When including the instruction stream overheads, in the best case, LoTTA saves 79% energy, and on average 40%.
机译：各种用例在内部内容的时代（IOT）需求处理器设备具有低能量消耗，以最大化电池寿命。除了能量约束之外，通常需要迅速执行面向控制的代码来提供低反应时间，并且有时能够有效地执行实时信号处理任务。作为对这些要求的回应，我们提出了一个极其节能的暴露DataPath核心。其运输触发的编程模型有助于通过低成本数据转发降低执行延迟。通过具有零延迟插槽分支的优化控制单元和预测执行来实现控制效率。包括指令寄存器文件，用于频繁执行的程序热点以降低指令流能量消耗。这些功能允许处理器平均执行CHStone和EEMBC Coremark基准，与具有类似DataPath资源的传统RISC核心相比，循环相比，循环更少19％。与RISC核心相比，核心平均消耗53％的能量。当包括指令流开销时，在最佳情况下，Lotta可以节省79％的能量，平均为40％。

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