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8228991: Obsolete -XX:UseAdaptiveGCBoundary

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Make option obsolete and removed supporting code.

Reviewed-by: tschatzl, stefank
This commit is contained in:
Kim Barrett 2020-04-17 23:22:34 -04:00
parent 05d6a66330
commit 4d487927ad
30 changed files with 64 additions and 1722 deletions
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21
src/hotspot/share/gc/shared/cardTable.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -253,19 +253,12 @@ void CardTable::resize_covered_region(MemRegion new_region) {
committed_unique_to_self(ind, MemRegion(new_end_aligned,
cur_committed.end()));
if (!uncommit_region.is_empty()) {
// It is not safe to uncommit cards if the boundary between
// the generations is moving. A shrink can uncommit cards
// owned by generation A but being used by generation B.
if (!UseAdaptiveGCBoundary) {
if (!os::uncommit_memory((char*)uncommit_region.start(),
uncommit_region.byte_size())) {
assert(false, "Card table contraction failed");
// The call failed so don't change the end of the
// committed region. This is better than taking the
// VM down.
new_end_aligned = _committed[ind].end();
}
} else {
if (!os::uncommit_memory((char*)uncommit_region.start(),
uncommit_region.byte_size())) {
assert(false, "Card table contraction failed");
// The call failed so don't change the end of the
// committed region. This is better than taking the
// VM down.
new_end_aligned = _committed[ind].end();
}
}