陈政霖
基于龙芯CPU 的服务器访存性能测试与分析
The Test and Analysis on Memory Access Performance Based on
Loongson CPU
摘 要 阐述了龙芯3 号CPU 的性能特点及应用情况,分析了影响内存带宽的因素以及龙芯与至强处理器之间的差别,并使用STRAM 测试工具测试出它们之间实际的内存带宽差距。提升龙芯CPU 的主频并且改进片内内存控制器来提升内存带宽,同时保证龙芯系列低功耗特点。
关键词 龙芯3 号CPU Intel 至强CPU STREAM 内存带宽 内存控制器 CPU 主频 功耗
Abstract: This article mainly expounds the performance characteristics of the Loongson 3
CPU and its situation of application, and the different in structure of Loongson 3 CPU and
Xeon CPU are compared to analysis the factors that could influence memory bandwidth. At
last we use STREAM to measure the actual memory bandwidth gap between this two kinds
of CPU. It is hoped that the Loongson 3 CPU memory controller could be modified and
increase CPU frequency to improve server memory bandwidth, while ensuring low power
consumption.
Keywords: Loongson 3 CPU; Intel Xeon CPU; STREAM; memory bandwidth; memory
controller; CPU frequency;power consumption
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