Merge train 190: GC full-collection throughput and promoted cohorts (v0.5.1568) - #10267

Merged

proggeramlug merged 40 commits into

mainfrom

Sep 14, 2026

Commits on Sep 14, 2026

gc: answer census arena membership from per-block object-start bitmaps (#10182)
Ralph Küpper
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9866ed2
gc: test-only arena index size accessor
Ralph Küpper
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13dc830
gc: start-bitmap test fixup
Ralph Küpper
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6f3bc9e
gc: allocate census start bitmaps in 8 KiB chunks
Ralph Küpper
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d75c51c
gc: skip a full's remembered-set rebuild when nothing young is marked (#10182)
Ralph Küpper
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7e3b008
gc: full-rebuild-skip tests check the known-live parent
Ralph Küpper
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d9aae42
gc: apply a full sweep's old-page accounting once per page (#10182)
Ralph Küpper
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420a641
gc: classify the full-rebuild skip counter and re-pin the census window
Ralph Küpper
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d5072f0
docs: per-live-object cost of a synchronous full (#10182)
Ralph Küpper
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c1e185e
changelog: fragment for #10220
Ralph Küpper
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01d6c85
changelog: correct the #10220 fragment's matrix and headroom claims
Ralph Küpper
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54421a8
gc: expand a described promoted page only where a full's sweep reshapes it (#10182)
Ralph Küpper
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2e8b1f0
gc: an unbudgeted census walks each arena block in one pass (#10182)
Ralph Küpper
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7de1da1
gc: a full's hole-list rebuild skips live blocks the census proved hole-free (#10182)
Ralph Küpper
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dd7f353
gc: an unbudgeted sweep walks each arena block in one pass (#10182)
Ralph Küpper
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a255005
gc: read the mark's per-slot facts once per object (#10182)
Ralph Küpper
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ab4c3b6
gc: find a census block through a direct-mapped window index (#10182)
Ralph Küpper
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3473b13
gc: mark a pointer-free object without queueing it (#10182)
Ralph Küpper
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48f96f1
gc: prefetch ahead in the full mark's worklist drain (#10182)
Ralph Küpper
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cd93f0a
gc: pace a full by the bytes promoted since the last full, at the promoting safepoint (#10182)
Ralph Küpper
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8288fae
gc: a promoted-cohort full adopts the census of the blocks its minor just promoted (#10182)
Ralph Küpper
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84bd96f
gc: prefetch a range descriptor's children before marking them; inline the sweep's page tally (#10182)
Ralph Küpper
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4140ad1
gc: census whole-block test plants enough objects for several bitmap blocks
Ralph Küpper
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3eb2a43
gc: classify the pacing-full counters and re-pin the census window (#10182)
Ralph Küpper
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d7f5fd5
docs: promoted-cohort fulls and the one-pass full (#10182)
Ralph Küpper
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e38e3fc
gc: the hole-list rebuild filters blocks in place instead of copying the liveness vector (#10182)
Ralph Küpper
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bac8c66
gc: zero the dead stack below a full's frame between the census and the root scan (#10182)
Ralph Küpper
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c953877
gc: re-pin the census window after the dead-stack scrub (#10182)
Ralph Küpper
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5fedc56
changelog: pacing-full cost and promoted-cohort fulls (#10182)
Ralph Küpper
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b2f41fd
changelog: state the target-row CPU miss exactly (#10182)
Ralph Küpper
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710348a
gc: a cohort full feeds the survival of the blocks its own minor promoted (#10182)
Ralph Küpper
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edec7cc
gc: feed the cohort full's survival only when it is the minor's view (#10182)
Ralph Küpper
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1e6c3ef
gc: test the dead-remembered-parent gate on the cohort survival feed (#10182)
Ralph Küpper
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577b2f0
gc: classify the cohort survival probe's thread-locals and re-pin the census window (#10182)
Ralph Küpper
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99dfcb8
gc: leave the remembered-parents record untouched on safepoints that did not record (#10182)
Ralph Küpper
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6a44e32
gc: note the remembered parents only for a promoting minor, as one page set (#10182)
Ralph Küpper
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19adcd8
gc: the promoted cohort counts in-place promotions only (#10182)
Ralph Küpper
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a6053c9
changelog: cohort survival feed and in-place-only cohort (#10182)
Ralph Küpper
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b13d074
fix(gc): preserve the sabotage panic in debug and pin the merged census window
Ralph Küpper
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f9b2f90
chore: release merge train 190 as v0.5.1568
Ralph Küpper
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73c7aaa