SnapBPF: Exploiting eBPF for Serverless Snapshot Prefetching
Contributors
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1.
National Technical University of Athens
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2.
Institute of Communication and Computer Systems
Description
In this work, we design SnapBPF, an eBPF-based snapshot prefetching mechanism, targeting VM-sandboxed serverless functions, which enables the efficient capture and prefetching of function working sets in kernel-space. SnapBPF deduplicates function working sets in memory and obviates the need for separately serializing them on disk. We complement SnapBPF with a lightweight paravirtualized interface to efficiently handle VM-sandbox memory allocations without requiring any snapshot pre-processing. Our evaluation shows that SnapBPF is able to match and improve state-ofthe-art performance with regard to i) function invocation latency and ii) memory usage for concurrent function invocations, without separately serializing working sets on disk or requiring any preemptive snapshot scanning.
Files
snapbpf-hotstorage25-preprint.pdf
Files
(657.6 kB)
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