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7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap

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Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich.

Reviewed-by: tschatzl, jmasa
This commit is contained in:
John Cuthbertson 2013-05-09 11:16:39 -07:00
parent 3d6c526864
commit c38f8fc543
14 changed files with 816 additions and 841 deletions
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42
hotspot/src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 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
@ -155,11 +155,6 @@ void WorkerDataArray<T>::verify() {
G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
_max_gc_threads(max_gc_threads),
_min_clear_cc_time_ms(-1.0),
_max_clear_cc_time_ms(-1.0),
_cur_clear_cc_time_ms(0.0),
_cum_clear_cc_time_ms(0.0),
_num_cc_clears(0L),
_last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
_last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
_last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
@ -212,11 +207,11 @@ void G1GCPhaseTimes::note_gc_end() {
_last_gc_worker_times_ms.set(i, worker_time);
double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
_last_satb_filtering_times_ms.get(i) +
_last_update_rs_times_ms.get(i) +
_last_scan_rs_times_ms.get(i) +
_last_obj_copy_times_ms.get(i) +
_last_termination_times_ms.get(i);
_last_satb_filtering_times_ms.get(i) +
_last_update_rs_times_ms.get(i) +
_last_scan_rs_times_ms.get(i) +
_last_obj_copy_times_ms.get(i) +
_last_termination_times_ms.get(i);
double worker_other_time = worker_time - worker_known_time;
_last_gc_worker_other_times_ms.set(i, worker_other_time);
@ -285,15 +280,6 @@ void G1GCPhaseTimes::print(double pause_time_sec) {
}
print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
if (Verbose && G1Log::finest()) {
print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
if (_num_cc_clears > 0) {
print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
}
}
double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
print_stats(1, "Other", misc_time_ms);
if (_cur_verify_before_time_ms > 0.0) {
@ -311,19 +297,3 @@ void G1GCPhaseTimes::print(double pause_time_sec) {
print_stats(2, "Verify After", _cur_verify_after_time_ms);
}
}
void G1GCPhaseTimes::record_cc_clear_time_ms(double ms) {
if (!(Verbose && G1Log::finest())) {
return;
}
if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms) {
_min_clear_cc_time_ms = ms;
}
if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms) {
_max_clear_cc_time_ms = ms;
}
_cur_clear_cc_time_ms = ms;
_cum_clear_cc_time_ms += ms;
_num_cc_clears++;
}