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Differential D1672

per-cpu page cache
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Authored by cem on Jan 25 2015, 10:42 PM.
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cem
emaste
imp

Details

Reviewers
kmacy
alc
adrian
Summary

Integrate from OneFS on behalf of Netflix:

  • Add per-cpu page caches to avoid contention on the page queue free mutex or large objects
  • Add the option of passing PQ_NONE to vm_page_unwire for callers that are going to subsequently free the page (making the add to the inactive queue simply unneeded overhead)
    • bump WITNESS_PENDLIST to avoid panic on boot
Test Plan

stress2, buildworld, netflix deployment

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Event Timeline

kmacy updated this revision to Diff 3433.Jan 25 2015, 10:42 PM
kmacy retitled this revision from to per-cpu page cache.
kmacy updated this object.
kmacy edited the test plan for this revision. (Show Details)
kmacy added a reviewer: alc.
emaste added a subscriber: emaste.Jan 26 2015, 1:13 AM
cse_cem_gmail_com added a reviewer: adrian.Jul 17 2015, 4:12 PM
cse_cem_gmail_com added a subscriber: cse_cem_gmail_com.

What can I do to help this along?

cse_cem_gmail_com removed a subscriber: cse_cem_gmail_com.Jul 17 2015, 4:13 PM
cem added a subscriber: cem.Jul 17 2015, 4:13 PM

Oops, wrong account.

adrian edited edge metadata.Jul 17 2015, 4:38 PM

Update it to the latest -HEAD? I have a whole bunch of 2 and 4 socket NUMA boxes I can test this out on.

Thanks!

-a

cem commandeered this revision.Jul 17 2015, 6:29 PM
cem added a reviewer: kmacy.

Sure. It applied cleanly against HEAD for me; took me a while to get a build (10.1 can't build CURRENT today). It boots, seems to run ok in a VM.

cem updated this revision to Diff 7055.Jul 17 2015, 6:29 PM
cem edited edge metadata.

Update to latest HEAD.

Herald added a subscriber: imp. · View Herald TranscriptJul 17 2015, 6:29 PM
adrian added a comment.Jul 19 2015, 1:31 AM

ok, so this adds a per-cpu free list /and/ disables the page cache piece. What's the effect going to be, besides reducing lock contention?

cem updated this object.Jul 19 2015, 1:43 AM
cem abandoned this revision.Dec 22 2016, 11:59 PM

Revision Contents
Changeset List

PathSize
sys/
kern/
2 lines
vm/
187 lines

Diff 3433

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sys/kern/subr_witness.c

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sys/vm/vm_page.c

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