摘要
针对传统多核处理器设计缺乏对虚拟机和典型云服务的支持的问题,分析了云计算数据中心和虚拟机的基本架构和特点,指出数据传输、网络性能、I/O虚拟化是一直未被关注的影响系统性能的关键因素,进而提出了一种改进的多核处理器设计方案。该方案通过采用片上内存拷贝引擎、改进直接内存访问(DMA)设计、改进直接缓存访问(DCA)设计和采用快速地址转换和远程内存访问(RDMA)技术,来较大地提高存储系统、网络、I/O的性能和系统的并行性。实验表明,该方案实现的单核800MHz处理器千兆以太网络TCP传输带宽较传统方案提高48.2%并达到峰值800Mbps,内存拷贝操作加速比达到14倍以上,快速傅立叶变换(FFT)和矩阵乘法加速比达到2倍以上,同时系统高速缓存效率显著提高。
To solve the problem that traditional multi-core processer designs rarely consider to give support to virtual ma- chines and typical cloud services, the paper analyzes the typical architecture and characteristics of data-centers for cloud computing and virtual machines and points out that data transfer, network performance and I/O virtualization are the key but neglected factors affecting system performance, and based on the analysis, proposes an improved multi-core processor design scheme. The scheme uses the innovative technologies of on-chip memory copy engine, improved direct memory access （DMA）, improved direct cache access （DCA）, fast address translation and remote DMA （RDMA） to increase the performance of memory system, network, I/O and parallelism. The experimental results show that when the scheme is used, the TCP bandwidth can be increased by 48.2%, a peak bandwidth 800Mbps can be achieved in a Gigabit Ethernet, the memory copy can reach a speed up of 14 times compared with the traditional methods, the speeds of fast fourier transform （FFT） and matrix multiplication can be doubled, while the cache efficiency is significantly improved.
出处
《高技术通讯》
CAS
CSCD
北大核心
2013年第4期360-367,共8页
Chinese High Technology Letters
基金
国家"核高基"科技重大专项(2010ZX01036-001-002
2009ZX01028-002-003
2009ZX01029-001-003)
国家自然科学基金(61100163
61133004)资助项目
关键词
云计算
多核处理器
网络优化
虚拟机
计算机体系结构
cloud computing, multi-core processor, networking optimization, virtual machine, computer architecture
