Coordinated and Efficient Huge Page Management with Ingens


Youngjin Kwon, Hangchen Yu, and Simon Peter, The University of Texas at Austin; Christopher J. Rossbach, The University of Texas at Austin and VMware; Emmett Witchel, The University of Texas at Austin


Modern computing is hungry for RAM, with today’s enormous capacities eagerly consumed by diverse workloads. Hardware address translation overheads have grown with memory capacity, motivating hardware manufacturers to provide TLBs with thousands of entries for large page sizes (called huge pages). Operating systems and hypervisors support huge pages with a hodge-podge of best-effort algorithms and spot fixes that made sense for architectures with limited huge page support, but the time has come for a more fundamental redesign.

Ingens is a framework for huge page support that relies on a handful of basic primitives to provide transparent huge page support in a principled, coordinated way. By managing contiguity as a first-class resource and by tracking utilization and access frequency of memory pages, Ingens is able to eliminate a number of fairness and performance pathologies that plague current systems. Experiments with our prototype demonstrate fairness improvements, performance improvements (up to 18%), tail-latency reduction (up to 41%), and reduction of memory bloat from 69% to less than 1% for important applications like Web services (e.g., the Cloudstone benchmark) and the Redis key-value store.

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@inproceedings {199348,
author = {Youngjin Kwon and Hangchen Yu and Simon Peter and Christopher J. Rossbach and Emmett Witchel},
title = {Coordinated and Efficient Huge Page Management with Ingens},
booktitle = {12th USENIX Symposium on Operating Systems Design and Implementation (OSDI 16)},
year = {2016},
isbn = {978-1-931971-33-1},
address = {Savannah, GA},
pages = {705--721},
url = {},
publisher = {USENIX Association},
month = nov

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