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8261501: Shenandoah: reconsider heap statistics memory ordering

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Reviewed-by: rkennke
This commit is contained in:
Aleksey Shipilev 2021-02-16 10:31:40 +00:00
parent 3cbd16de3d
commit 3f8819c666
1 changed files with 8 additions and 9 deletions
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17
src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
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@ -620,12 +620,11 @@ void ShenandoahHeap::post_initialize() {
}
size_t ShenandoahHeap::used() const {
return Atomic::load_acquire(&_used);
return Atomic::load(&_used);
}
size_t ShenandoahHeap::committed() const {
OrderAccess::acquire();
return _committed;
return Atomic::load(&_committed);
}
void ShenandoahHeap::increase_committed(size_t bytes) {
@ -639,20 +638,20 @@ void ShenandoahHeap::decrease_committed(size_t bytes) {
}
void ShenandoahHeap::increase_used(size_t bytes) {
Atomic::add(&_used, bytes);
Atomic::add(&_used, bytes, memory_order_relaxed);
}
void ShenandoahHeap::set_used(size_t bytes) {
Atomic::release_store_fence(&_used, bytes);
Atomic::store(&_used, bytes);
}
void ShenandoahHeap::decrease_used(size_t bytes) {
assert(used() >= bytes, "never decrease heap size by more than we've left");
Atomic::sub(&_used, bytes);
Atomic::sub(&_used, bytes, memory_order_relaxed);
}
void ShenandoahHeap::increase_allocated(size_t bytes) {
Atomic::add(&_bytes_allocated_since_gc_start, bytes);
Atomic::add(&_bytes_allocated_since_gc_start, bytes, memory_order_relaxed);
}
void ShenandoahHeap::notify_mutator_alloc_words(size_t words, bool waste) {
@ -1883,11 +1882,11 @@ address ShenandoahHeap::gc_state_addr() {
}
size_t ShenandoahHeap::bytes_allocated_since_gc_start() {
return Atomic::load_acquire(&_bytes_allocated_since_gc_start);
return Atomic::load(&_bytes_allocated_since_gc_start);
}
void ShenandoahHeap::reset_bytes_allocated_since_gc_start() {
Atomic::release_store_fence(&_bytes_allocated_since_gc_start, (size_t)0);
Atomic::store(&_bytes_allocated_since_gc_start, (size_t)0);
}
void ShenandoahHeap::set_degenerated_gc_in_progress(bool in_progress) {