WineFS: a hugepage-aware file system for persistent memory that ages gracefully

Rohan Kadekodi, Saurabh Kadekodi, Soujanya Ponnapalli, Harshad Shirwadkar, Gregory R. Ganger, Aasheesh Kolli, Vijay Chidambaram

Research output: Chapter in Book/Report/Conference proceedingConference contribution

25 Scopus citations

Abstract

Modern persistent-memory (PM) file systems perform well in benchmark settings, when the file system is freshly created and empty. But after being aged by usage, as will be the normal mode in practice, their memory-mapped performance degrades significantly. This paper shows that the cause is their inability to use 2MB hugepages to map files when aged, having to use 4KB pages instead and suffering many extra page faults and TLB misses as a result. We introduce WineFS, a novel hugepage-aware PM file system that largely eliminates this effect. WineFS combines a new alignment-aware allocator with fragmentation-avoiding approaches to consistency and concurrency to preserve the ability to use hugepages. Experiments show that WineFS resists the effects of aging and outperforms state-of-the-art PM file systems in both aged and un-aged settings. For example, in an aged setup, the LMDB memory-mapped database obtains 2x higher write throughput on WineFS compared to NOVA, and 70% higher throughput compared to ext4-DAX. When reading a memory-mapped persistent radix tree, WineFS results in 56% lower median latency than NOVA.

Original languageEnglish (US)
Title of host publicationSOSP 2021 - Proceedings of the 28th ACM Symposium on Operating Systems Principles
PublisherAssociation for Computing Machinery, Inc
Pages804-818
Number of pages15
ISBN (Electronic)9781450387095
DOIs
StatePublished - Oct 26 2021
Event28th ACM Symposium on Operating Systems Principles, SOSP 2021 - Virtual, Online, Germany
Duration: Oct 26 2021Oct 29 2021

Publication series

NameSOSP 2021 - Proceedings of the 28th ACM Symposium on Operating Systems Principles

Conference

Conference28th ACM Symposium on Operating Systems Principles, SOSP 2021
Country/TerritoryGermany
CityVirtual, Online
Period10/26/2110/29/21

All Science Journal Classification (ASJC) codes

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Software

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