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.
No takes yet. Share an insight, caveat, or question.
Kadekodi et al. (2021) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: