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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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20
hotspot/src/share/vm/gc_implementation/g1/survRateGroup.cpp
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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
@ -55,7 +55,6 @@ SurvRateGroup::SurvRateGroup(G1CollectorPolicy* g1p,
void SurvRateGroup::reset()
{
_all_regions_allocated = 0;
_scan_only_prefix = 0;
_setup_seq_num = 0;
_stats_arrays_length = 0;
_accum_surv_rate = 0.0;
@ -74,7 +73,7 @@ void SurvRateGroup::reset()
void
SurvRateGroup::start_adding_regions() {
_setup_seq_num = _stats_arrays_length;
_region_num = _scan_only_prefix;
_region_num = 0;
_accum_surv_rate = 0.0;
#if 0
@ -163,12 +162,6 @@ SurvRateGroup::next_age_index() {
return (int) ++_all_regions_allocated;
}
void
SurvRateGroup::record_scan_only_prefix(size_t scan_only_prefix) {
guarantee( scan_only_prefix <= _region_num, "pre-condition" );
_scan_only_prefix = scan_only_prefix;
}
void
SurvRateGroup::record_surviving_words(int age_in_group, size_t surv_words) {
guarantee( 0 <= age_in_group && (size_t) age_in_group < _region_num,
@ -218,13 +211,12 @@ SurvRateGroup::all_surviving_words_recorded(bool propagate) {
#ifndef PRODUCT
void
SurvRateGroup::print() {
gclog_or_tty->print_cr("Surv Rate Group: %s (%d entries, %d scan-only)",
_name, _region_num, _scan_only_prefix);
gclog_or_tty->print_cr("Surv Rate Group: %s (%d entries)",
_name, _region_num);
for (size_t i = 0; i < _region_num; ++i) {
gclog_or_tty->print_cr(" age %4d surv rate %6.2lf %% pred %6.2lf %%%s",
gclog_or_tty->print_cr(" age %4d surv rate %6.2lf %% pred %6.2lf %%",
i, _surv_rate[i] * 100.0,
_g1p->get_new_prediction(_surv_rate_pred[i]) * 100.0,
(i < _scan_only_prefix) ? " S-O" : " ");
_g1p->get_new_prediction(_surv_rate_pred[i]) * 100.0);
}
}