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Learn about the Extension Interface Model (EIM) and bpftime framework in this 15-minute conference presentation from OSDI '25. Discover how researchers from UC Santa Cruz, eunomia-bpf Community, ShanghaiTech University, South China University of Technology, and Virginia Tech have developed a novel approach to extending userspace applications more safely and efficiently than current methods. Explore the EIM model that treats each required extension feature as a resource, including both concrete hardware resources like memory and abstract ones such as function invocation capabilities from extended applications. Understand how extension managers can specify only the necessary resources for extensions to perform their tasks. Examine the bpftime framework that enforces EIM specifications through extended Berkeley Packet Filter (eBPF)-style verification, hardware-supported isolation features like Intel MPK, and dynamic binary rewriting for enhanced efficiency. See how this system maintains compatibility with existing eBPF ecosystems while being easy to adopt into current workflows. Review practical demonstrations across six use cases that showcase improvements in security, performance monitoring and enhancement, and configuration trade-off exploration.
