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8007763: Refactoring: split up compute_generation_free_space() into two functions for class PSAdaptiveSizePolicy

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Split up compute_generation_free_space() into two functions: compute_eden_space_size() + compute_old_gen_free_space(), each of which (if needed) can be reused without executing an overhead of the other.

Reviewed-by: jmasa, tschatzl
This commit is contained in:
Tao Mao 2013-05-15 10:41:22 -07:00 • committed by Tao Mao
parent 8d53e75550
commit 87b3317478
5 changed files with 434 additions and 179 deletions
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39
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2013, 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
@ -2084,19 +2084,36 @@ bool PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) {
young_gen->from_space()->capacity_in_bytes() +
young_gen->to_space()->capacity_in_bytes(),
"Sizes of space in young gen are out-of-bounds");
size_t young_live = young_gen->used_in_bytes();
size_t eden_live = young_gen->eden_space()->used_in_bytes();
size_t old_live = old_gen->used_in_bytes();
size_t cur_eden = young_gen->eden_space()->capacity_in_bytes();
size_t max_old_gen_size = old_gen->max_gen_size();
size_t max_eden_size = young_gen->max_size() -
young_gen->from_space()->capacity_in_bytes() -
young_gen->to_space()->capacity_in_bytes();
size_policy->compute_generation_free_space(
young_gen->used_in_bytes(),
young_gen->eden_space()->used_in_bytes(),
old_gen->used_in_bytes(),
young_gen->eden_space()->capacity_in_bytes(),
old_gen->max_gen_size(),
max_eden_size,
true /* full gc*/,
gc_cause,
heap->collector_policy());
// Used for diagnostics
size_policy->clear_generation_free_space_flags();
size_policy->compute_generation_free_space(young_live,
eden_live,
old_live,
cur_eden,
max_old_gen_size,
max_eden_size,
true /* full gc*/);
size_policy->check_gc_overhead_limit(young_live,
eden_live,
max_old_gen_size,
max_eden_size,
true /* full gc*/,
gc_cause,
heap->collector_policy());
size_policy->decay_supplemental_growth(true /* full gc*/);
heap->resize_old_gen(
size_policy->calculated_old_free_size_in_bytes());