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Recently, researchers discovered a GPU has some advantages for non-graphic computing. CPU-GPU heterogeneous architecture combines CPU and GPU to a chip and makes GPU easier to run non-graphic programs. Researchers also proposed LLC(last-level cache) to store and exchange data between CPU and GPU. We discover the LLC hit rate has great influence on memory access performance and system's performance...
The modern GPU has powerful parallel processing unit and programmable pipeline, therefore GPU has some advantages for non-graphic computing. However, GPU needs a lot of memory access bandwidth. GPU uses memory access coalescing method to reduce memory access requests that have good locality. Paper [1] proposes equivalent memory access coalescing to improve memory access performance when the program's...
Simultaneous Multithreading(SMT) technology is designed for using the hardware resources more efficiently by implementing Thread Level Parallelism. Usually, an SMT processor fetches instructions from different threads each cycle and fulfills shared instruction queues. Hence, the quality of the instruction sequence which is mainly constructed by the fetch unit would heavily affect the SMT processor's...
Thermal management has become a prominent challenge for real-time systems as power consumption continues to increase dramatically. On the other hand, the real-time performance is seriously limited by the thermal issue because the processors have to avoid overheating all the time. As a result, a lot of precious computing resource is unnecessarily wasted. In order to address these problems, this paper...
STT-RAM has emerged as one of the most promising candidates for future on-chip cache due to STT-RAM's high density and low leakage. However, the STT-RAM has many disadvantages, such as: high write energy and long writing latency. To alleviate the problems, many STT-RAM and SRAM hybrid cache architectures have been proposed. In this paper, we propose a prediction table based hybrid L2 cache management...
As power consumption continues to increase dramatically in real-time systems, the thermal management has become a prominent issue. Taking leakage current into account, this paper focuses on the maximum temperature minimization for the processor executing a set of real-time tasks with a common deadline. We prove that, for a specific interval, constant-speed schedule applying the lowest constant speed...
With the growing popularity of 3G-powered devices and their serious energy consumption problem, there are growing demands on energy-efficient data transmission strategies for various embedded systems. Different from the past work in energy-efficient real-time task scheduling, we explore strategies to maximize the amount of data transmitted by a 3G module under a given battery capacity. In particular,...
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