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8351892: GenShen: Remove vestigial young generation sizing options

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Reviewed-by: kdnilsen, ysr
This commit is contained in:
William Kemper 2026-01-15 22:35:49 +00:00
parent a1b039aa98
commit 87cbcadacf
2 changed files with 0 additions and 23 deletions
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11
src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.cpp
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@ -104,17 +104,6 @@ void ShenandoahGenerationalHeap::initialize_heuristics() {
// Initialize global generation and heuristics even in generational mode.
ShenandoahHeap::initialize_heuristics();
// Max capacity is the maximum _allowed_ capacity. That is, the maximum allowed capacity
// for old would be total heap - minimum capacity of young. This means the sum of the maximum
// allowed for old and young could exceed the total heap size. It remains the case that the
// _actual_ capacity of young + old = total.
size_t region_count = num_regions();
size_t max_young_regions = MAX2((region_count * ShenandoahMaxYoungPercentage) / 100, (size_t) 1U);
size_t initial_capacity_young = max_young_regions * ShenandoahHeapRegion::region_size_bytes();
size_t max_capacity_young = initial_capacity_young;
size_t initial_capacity_old = max_capacity() - max_capacity_young;
size_t max_capacity_old = max_capacity() - initial_capacity_young;
_young_generation = new ShenandoahYoungGeneration(max_workers());
_old_generation = new ShenandoahOldGeneration(max_workers());
_young_generation->initialize_heuristics(mode());

12
src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp
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@ -430,18 +430,6 @@
"by thread type (worker or mutator) and evacuation type (young, " \
"old, or promotion.") \
\
product(uintx, ShenandoahMinYoungPercentage, 20, EXPERIMENTAL, \
"The minimum percentage of the heap to use for the young " \
"generation. Heuristics will not adjust the young generation " \
"to be less than this.") \
range(0, 100) \
\
product(uintx, ShenandoahMaxYoungPercentage, 100, EXPERIMENTAL, \
"The maximum percentage of the heap to use for the young " \
"generation. Heuristics will not adjust the young generation " \
"to be more than this.") \
range(0, 100) \
\
product(uintx, ShenandoahCriticalFreeThreshold, 1, EXPERIMENTAL, \
"How much of the heap needs to be free after recovery cycles, " \
"either Degenerated or Full GC to be claimed successful. If this "\