dma设备存储器

3.3.3 PCI设备对可Cache的存储器空间进行DMA读写

如果PCI设备访问的数据没有在Cache中命中，Snoop Agents会通知FSB总线，PCI设备所访问的数据不在Cache中，此时存储器控制器(Response Agent)将在Data Phase向HOST主桥提供数据。PCI设备向“可Cache的”存储器区域进行写操作，无论对于Power...

3.3.2 PCI设备对不可Cache的存储器空间进行DMA读写

在x86处理器和PowerPC处理器中，PCI设备对“不可Cache的存储器空间”进行DMA读写的过程并不相同。其中PowerPC处理器对“不可Cache的存储器空间”进行DMA读写进行了专门的处理，而x86处理器在对这类空间操作时，效率相对较低。1 x86处理器 ...

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存储

阿里云是目前国内规模最大的云存储服务商，采用自研飞天大规模分布式存储引擎“盘古2.0”，支撑双11轻松度过吞吐TB/s，IOPS上亿/s的压力，为全球企业提供如磐石的可靠存储服务。

基础存储

数据存储

混合云存储