An introduction to CPU and DSP design in China

Hu, Weiwu; Zhang, Yifu; Fu, Jie

doi:10.1007/s11432-015-5431-6

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…Loongson (also called Godson) is a set of general purpose MIPS CPUs developed by the Institute of Computing Technology of Chinese Academy of Science, and Loongson Technology Corporation Limited [2]. Loongson defined loongson 3 (Large), Loongson 2 (Medium), and Loongson 1 (Small) three series for different purpose [3].…”

Section: Loongsonmentioning

confidence: 99%

Loongson IoT Gateway: A Technical Review

Xie,

Deng

2016

Preprint

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A prototype of Loongson IoT (Internet of Things) ZigBee gateway is already designed and implemented. However, this prototype is not perfect enough because of the lack of a number of functions. And a lot of things should be done to improve this prototype, such as adding widely used IEEE 802.11 function, using a fully open source ZigBee protocol stack to get rid of proprietary implement or using a fully open source embedded operating system to support 6LoWPAN, and implementing multiple interfaces.

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Section: Loongsonmentioning

confidence: 99%

Loongson IoT Gateway: A Technical Review

Xie,

Deng

2016

Preprint

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“…has rich application tools in Linux open-source projects. The main reason that currently restricts the development of CPUs that implement non-X86 instruction set architecture such as MIPS64 is the immature software ecosystem (Hu et al, 2016). Based on the strategy of open-source software, Loongson platform has gained abundant software tools, making it possible to further develop scientific computing and numerical models.…”

Section: Introductionmentioning

confidence: 99%

Application of regional meteorology and air quality models based on MIPS CPU Platform

Bai,

Wu,

Cao

et al. 2024

Preprint

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Abstract. The MIPS processor architecture is a type of Reduced Instruction Set Computing (RISC) processor architecture, which has advantages in terms of energy consumption and efficiency. There are few studies on the application of MIPS CPUs in the geoscientific numerical models. In this study, Loongson 3A4000 CPU platform with MIPS64 architecture was used to establish the runtime environment for the air quality modelling system WRF-CAMx in Beijing-Tianjin-Hebei region. The results show that the relative errors for the major species (NO2, SO2, O3, CO, PNO3 and PSO4) between the MIPS and X86 benchmark platform are within ± 0.1 %. The maximum Mean Absolute Error (MAE) of major species ranged to 10−2 ppbV or μg m−3, the maximum Root Mean Square Error (RMSE) ranged to 10−1 ppbV or μg m−3, and the Mean Absolute Percentage Error (MAPE) remained within 0.5 %. The CAMx takes about 15.2 minutes on Loongson 3A4000 CPU and 4.8 minutes on Intel Xeon E5-2697 v4 CPU, when simulating a 2h-case with four parallel processes using MPICH. As a result, the single-core computing capability of Loongson 3A4000 CPU for the WRF-CAMx modeling system is about one-third of Intel Xeon E5-2697 v4 CPU, but the thermal design power (TDP) of Loongson 3A4000 is 30W, only about one-fifth of Intel Xeon E5-2697 v4, which TDP is 145W. Thus, Loongson 3A4000 has higher energy efficiency in the application of the WRF-CAMx modeling system. The results also verify the feasibility of cross-platform porting and the scientific usability of the ported model. This study provides a technical foundation for the porting and optimization of numerical models based on MIPS or other RISC platforms.

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Dynamic cluster strategy for hierarchical rollback‐recovery protocols in MPI HPC applications

Liao

Zhang

Jin

et al. 2017

Concurrency and Computation

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SummaryFault tolerance in parallel computing becomes increasingly important with a significant rise in high‐performance computing systems. Coordinated checkpointing and message logging protocols are commonly used fault tolerance mechanisms for message‐passing applications. However, these mechanisms are insufficient because of their severe drawbacks. Hierarchical rollback‐recovery protocols, combining coordinated checkpointing with message logging, are a better solution. However, such protocols may not obtain the appropriate efficiency because the communication pattern in different stages of applications may vary at runtime. In an effort to improve the efficiency of hierarchical rollback‐recovery protocols, we propose a dynamic cluster strategy to adapt to the runtime variation of communication pattern by using a prediction scheme. Finally, the efficiency and scalability of the dynamic cluster strategy are evaluated using 2 static process partition algorithms on the High‐Performance Linpack benchmark.

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An introduction to CPU and DSP design in China

Cited by 7 publications

References 23 publications

Loongson IoT Gateway: A Technical Review

Loongson IoT Gateway: A Technical Review

Application of regional meteorology and air quality models based on MIPS CPU Platform

Dynamic cluster strategy for hierarchical rollback‐recovery protocols in MPI HPC applications

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