Interesting. Doing the necessary rituals of sacrifice to get postgres started with the text segment mapped as huge pages yields nearly 10% speedup in a highly concurrent workload.
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It does? For it to work well one needs to make sure that the text segment and data/bss segments are far enough apart to fit onto separate 2MB huge pages. Otherwise you'd give up sharing the text segment, which'd again have its own cost.
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Hmm, recent research on making it work well, using PostgreSQL (and other stuff): https://www.cs.rochester.edu/u/xdong/ispass-19-final.pdf …
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