Abstract

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Energy harvesting is gaining more and more attentions due to its characteristics of ultra-long operation time without maintenance. However, frequent unpredictable power failures from energy harvesters bring performance and reliability challenges to traditional processors. Nonvolatile processors are promising to solve such a problem due to their advantage of zero leakage and efficient backup and restore operations. To optimize the nonvolatile processor design, this paper proposes new metrics of nonvolatile processors to consider energy harvesting factors for the first time. Furthermore, we explore the nonvolatile processor design from circuit to system level. A prototype of energy harvesting nonvolatile processor is set up and experimental results show that the proposed performance metric meets the measured results by less than 6.27% average errors. Finally, the energy consumption of nonvolatile processor is analyzed under different benchmarks.

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Abstract-Modern architecture research relies heavily on detailed pipeline simulation. Simulating the full execution of an industry standard benchmark can take weeks to complete. Simulating the full execution of the whole benchmark suite for one architecture configuration can take months. To address this issue researchers have examined using targetted sampling based on phase behavior to significantly reduce the simulation time of each program in the benchmark suite. However, even with this sampling approach, simulating the full benchmark suite across a large range of architecture designs can take days to weeks to complete.The goal of this paper is to further reduce simulation time for architecture design space exploration. We reduce simulation time by finding similarity between benchmarks and program inputs at the level of samples (100M instructions of execution). This allows us to use a representative sample of execution from one benchmark to accurately represent a sample of execution of other benchmarks and inputs. The end result of our analyis is a small number of sample points of execution. These are selected across the whole benchmark suite in order to accurately represent the complete simulation of the whole benchmark suite for design space exploration. We show that this provides approximately the same accuracy as the SimPoint sampling approach while reducing the number of simulated instructions by a factor of 1.5.

A recent study [1]

Clinically, the development of pulmonary edema is frequently associated with an elevation of left atrial pressure. 1 However, overt pulmonary edema does not always occur with such pressure elevations, even when the plasma oncotic pressure is greatly exceeded. 2 It is conceivable that a dilatation of the pulmonary lymphatic system might remove fluid from the lung and prevent, or delay, the development of overt pulmonary edema. In experimental studies on the dog, it has been demonstrated that lymph flow from the lungs increased with an acute elevation of the pulmonary venous pressure 3 " 6 ; however, the quantity of lymph was small and apparently ineffective in preventing the development of pulmonary edema. The critical question, however, of the extent of the pulmonary lymph flow in chronic pulmonary edema remained unanswered. It was the purpose of the current study to determine what i*ole, if any, the lymphatics play in the prevention of chronic pulmonary edema. MethodsMongrel dogs were used in this study. The aninuils were anesthetized with intravenous sodium pentobnrbitnl (29 mg./Kg.), and a side-to-side 5 to 15-min. aorticocuvnl anastomosis was made immediately below the renal vessels by approximating and suturing the aorta and vena cava. Dogs not surviving moro than one month were excluded from the study. Thirty animals not included iu the experimental group were used for preliminary