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Instead of partitioning blocks by flag, put them in separate lists

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This way you can directly iterate blocks of a certain kind.  Also verify
these lists more thoroughly, and allow full blocks that are the results
of evacuation to skip being swept the next round.  Also!  Have
next_hole_in_block / next_hole_in_block ensure that the object data and
the mark bytes are clear.
This commit is contained in:
Andy Wingo 2024-08-22 18:04:21 +02:00
parent b663e5878e
commit d137e1397c
2 changed files with 310 additions and 253 deletions
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5
src/whippet.c
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@ -1024,7 +1024,7 @@ collect(struct gc_mutator *mut, enum gc_collection_kind requested_kind) {
determine_collection_kind(heap, requested_kind);
int is_minor = gc_kind == GC_COLLECTION_MINOR;
HEAP_EVENT(heap, prepare_gc, gc_kind);
nofl_space_update_mark_patterns(nofl_space, !is_minor);
nofl_space_prepare_gc(nofl_space, gc_kind);
large_object_space_start_gc(lospace, is_minor);
gc_extern_space_start_gc(exspace, is_minor);
resolve_ephemerons_lazily(heap);
@ -1042,8 +1042,7 @@ collect(struct gc_mutator *mut, enum gc_collection_kind requested_kind) {
DEBUG("last gc yield: %f; fragmentation: %f\n", yield, fragmentation);
detect_out_of_memory(heap);
trace_pinned_roots_after_stop(heap);
if (gc_kind == GC_COLLECTION_COMPACTING)
nofl_space_prepare_evacuation(nofl_space);
nofl_space_start_gc(nofl_space, gc_kind);
trace_roots_after_stop(heap);
HEAP_EVENT(heap, roots_traced);
gc_tracer_trace(&heap->tracer);