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    Wang Zhan, Cao Zheng, Liu Xiaoli, Su Yong, Li Qiang, An Xuejun, Sun Ninghui. A Multi-Root I/O Resource Pooling Method Based on Single-Root I/O Virtualization[J]. Journal of Computer Research and Development, 2015, 52(1): 83-93. DOI: 10.7544/issn1000-1239.2015.20131182
    Citation: Wang Zhan, Cao Zheng, Liu Xiaoli, Su Yong, Li Qiang, An Xuejun, Sun Ninghui. A Multi-Root I/O Resource Pooling Method Based on Single-Root I/O Virtualization[J]. Journal of Computer Research and Development, 2015, 52(1): 83-93. DOI: 10.7544/issn1000-1239.2015.20131182

    A Multi-Root I/O Resource Pooling Method Based on Single-Root I/O Virtualization

    • Virtualization offers data center with efficient server consolidation and flexible application deployment, but it requires data center servers improve their I/O devices to get with the needs of virtualization, and to make up the performance degradation brought by device virtual sharing between virtual machines. These changes bring the redundancy of I/O devices for each server under current I/O architecture, increase the cost of data center infrastructure and add more I/O cables between servers. To solve these problems, we design and implement a SRIOV-based multi-root I/O resource pooling method. Through a hardware-based PCIe ID remapping and address remapping technology, virtual functions in the same SR-IOV I/O devices can be shared among different physical servers, which efficiently reduces the redundancy of I/O resources under virtualization environment. We also adopt a hotplug-based virtual I/O device allocation method to dynamically adjust resources between servers for increasing resource utilization. Experiments prove our design does can provides functions mentioned above and maintain server I/O performance as it using directly-attached devices.
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