Abstract
Single-Root I/O Virtualization (SR-IOV) is a specification that allows a single PCI Express (PCIe) device (ysical function or PF) to be used as multiple PCIe devices (virtual functions or VF). In a virtualization system, each VF can be directly assigned to a virtual machine (VM) in passthrough mode to significantly improve the network performance. However, VF passthrough mode is not compatible with live migration, which is an essential capability that enables many advanced virtualization features such as high availability and resource provisioning. To solve this problem, we design SRVM which provides hypervisor support to ensure the VF device can be correctly used by the migrated VM and the applications. SRVM is implemented in the hypervisor without modification in guest operating systems or guest VM drivers. Our experimental results show that SRVM can effectively migrate all memory state, and there is no data loss or corruption in applications after live migration. SRVM does not increase VM downtime. It only costs limited resources (an extra CPU core), and there is no significant runtime overhead in VM network performance. In fact, since the VF can continue to be used during the pre-copy ase, it offers network throughput which is 9.6 times and network latency which is 98% lower compared to other solutions that switch to para-virtualization mode during live migration.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
