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6819061: G1: eliminate serial Other times that are proportional to the collection set length

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6871109: G1: remove the concept of the scan only prefix

Removed scan only regions and associated code. The young portion of the collection set is now constructed incrementally - when a young region is retired as the current allocation region it is added to the collection set.

Reviewed-by: apetrusenko, iveresov, tonyp
This commit is contained in:
John Cuthbertson 2010-04-22 10:02:38 -07:00
parent db6aad1e4e
commit b1867e0dd5
12 changed files with 895 additions and 1013 deletions
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14
hotspot/src/share/vm/gc_implementation/g1/survRateGroup.hpp
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@ -1,5 +1,5 @@
/*
* Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 2001-2010 Sun Microsystems, Inc. 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
@ -41,7 +41,6 @@ private:
int _all_regions_allocated;
size_t _region_num;
size_t _scan_only_prefix;
size_t _setup_seq_num;
public:
@ -51,13 +50,11 @@ public:
void reset();
void start_adding_regions();
void stop_adding_regions();
void record_scan_only_prefix(size_t scan_only_prefix);
void record_surviving_words(int age_in_group, size_t surv_words);
void all_surviving_words_recorded(bool propagate);
const char* name() { return _name; }
size_t region_num() { return _region_num; }
size_t scan_only_length() { return _scan_only_prefix; }
double accum_surv_rate_pred(int age) {
assert(age >= 0, "must be");
if ((size_t)age < _stats_arrays_length)
@ -82,17 +79,12 @@ public:
int next_age_index();
int age_in_group(int age_index) {
int ret = (int) (_all_regions_allocated - age_index);
int ret = (int) (_all_regions_allocated - age_index);
assert( ret >= 0, "invariant" );
return ret;
}
int recalculate_age_index(int age_index) {
int new_age_index = (int) _scan_only_prefix - age_in_group(age_index);
guarantee( new_age_index >= 0, "invariant" );
return new_age_index;
}
void finished_recalculating_age_indexes() {
_all_regions_allocated = (int) _scan_only_prefix;
_all_regions_allocated = 0;
}
#ifndef PRODUCT