面向GPU的低能耗数据传输的组重映射编码方法OA

The high-performance computing capabilities of modern graphics processing unit(GPU)rely on high-bandwidth graphics double data rate(GDDR)interfaces.The high data transfer rates result in significant energy consumption,particularly due to the asymmetric power consumption associated with transmitting logic 1 values in GDDR's pseudo open drain(POD)I/O interfaces.By reducing the number of logic 1 values with high energy consumption during data transfer,the issue of high energy consumption during data transfer can be alleviated.This paper proposes a group-remapping encoding method based on the quantity of logic 1 values.Initially,the data to be transmitted is divided into basic units of 4 bits each,which are then grouped according to the number of logic 1 values they contain.Sub-sequently,groups with a higher quantity of logic 1 values are mapped and encoded into groups with a lower quantity of logic 1 values,aiming to minimize the global count of logic 1 values.When evaluated on modern GPU architectures,the results demonstrate that the group-remapping encoding strategy ef-fectively reduces the number of logic 1 values during data transmission for various applications,achiev-ing an average reduction rate of 26%,thereby proving the effectiveness of the proposed method.