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Differential D27145

malloc: provide 384 byte zone
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Authored by mjg on Nov 9 2020, 1:55 AM.
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rS367533: malloc: provide 384 byte zone
Summary

It provides a clear cut win when using ZFS, which performs a host of very different allocations.

Total page count after buildworld for 384 (if present) and 512 zones:
before: 29713
after: 25946

btw,
vm.uma.malloc_384.keg.domain.1.pages: 11621
vm.uma.malloc_384.keg.domain.0.pages: 11597
vm.uma.malloc_512.keg.domain.1.pages: 1280
vm.uma.malloc_512.keg.domain.0.pages: 1448

Adding more zones with smaller sizes led to inconclusive results, will have to be revisited.

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rS FreeBSD src repository - subversion
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Event Timeline

mjg created this revision.Nov 9 2020, 1:55 AM
Herald added a subscriber: imp. · View Herald TranscriptNov 9 2020, 1:55 AM
mjg requested review of this revision.Nov 9 2020, 1:55 AM
Harbormaster completed remote builds in B34703: Diff 79340.Nov 9 2020, 1:55 AM
markj accepted this revision.Nov 9 2020, 5:33 PM
This revision is now accepted and ready to land.Nov 9 2020, 5:33 PM
Closed by commit rS367533: malloc: provide 384 byte zone (authored by mjg). · Explain WhyNov 10 2020, 2:14 AM
This revision was automatically updated to reflect the committed changes.
mjg added a commit: rS367533: malloc: provide 384 byte zone.

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head/
sys/
kern/
1 line

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head/sys/kern/kern_malloc.c

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