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/*
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* Copyright 2006-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_mutableNUMASpace.cpp.incl"
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MutableNUMASpace::MutableNUMASpace() {
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_lgrp_spaces = new (ResourceObj::C_HEAP) GrowableArray<LGRPSpace*>(0, true);
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_page_size = os::vm_page_size();
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_adaptation_cycles = 0;
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_samples_count = 0;
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update_layout(true);
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}
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MutableNUMASpace::~MutableNUMASpace() {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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delete lgrp_spaces()->at(i);
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}
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delete lgrp_spaces();
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}
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void MutableNUMASpace::mangle_unused_area() {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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LGRPSpace *ls = lgrp_spaces()->at(i);
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MutableSpace *s = ls->space();
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if (!os::numa_has_static_binding()) {
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HeapWord *top = MAX2((HeapWord*)round_down((intptr_t)s->top(), page_size()), s->bottom());
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if (top < s->end()) {
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ls->add_invalid_region(MemRegion(top, s->end()));
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}
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}
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s->mangle_unused_area();
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}
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}
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// There may be unallocated holes in the middle chunks
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// that should be filled with dead objects to ensure parseability.
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void MutableNUMASpace::ensure_parsability() {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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LGRPSpace *ls = lgrp_spaces()->at(i);
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MutableSpace *s = ls->space();
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if (!s->contains(top())) {
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if (s->free_in_words() > 0) {
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SharedHeap::fill_region_with_object(MemRegion(s->top(), s->end()));
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size_t area_touched_words = pointer_delta(s->end(), s->top(), sizeof(HeapWordSize));
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#ifndef ASSERT
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if (!ZapUnusedHeapArea) {
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area_touched_words = MIN2((size_t)align_object_size(typeArrayOopDesc::header_size(T_INT)),
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area_touched_words);
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}
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#endif
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if (!os::numa_has_static_binding()) {
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MemRegion invalid;
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HeapWord *crossing_start = (HeapWord*)round_to((intptr_t)s->top(), os::vm_page_size());
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HeapWord *crossing_end = (HeapWord*)round_to((intptr_t)(s->top() + area_touched_words),
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os::vm_page_size());
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if (crossing_start != crossing_end) {
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// If object header crossed a small page boundary we mark the area
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// as invalid rounding it to a page_size().
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HeapWord *start = MAX2((HeapWord*)round_down((intptr_t)s->top(), page_size()), s->bottom());
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HeapWord *end = MIN2((HeapWord*)round_to((intptr_t)(s->top() + area_touched_words), page_size()),
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s->end());
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invalid = MemRegion(start, end);
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}
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ls->add_invalid_region(invalid);
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}
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s->set_top(s->end());
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}
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} else {
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if (!os::numa_has_static_binding()) {
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#ifdef ASSERT
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MemRegion invalid(s->top(), s->end());
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ls->add_invalid_region(invalid);
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#else
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if (ZapUnusedHeapArea) {
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MemRegion invalid(s->top(), s->end());
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ls->add_invalid_region(invalid);
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} else break;
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#endif
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}
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}
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}
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}
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size_t MutableNUMASpace::used_in_words() const {
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size_t s = 0;
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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s += lgrp_spaces()->at(i)->space()->used_in_words();
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}
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return s;
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}
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size_t MutableNUMASpace::free_in_words() const {
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size_t s = 0;
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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s += lgrp_spaces()->at(i)->space()->free_in_words();
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}
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return s;
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}
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size_t MutableNUMASpace::tlab_capacity(Thread *thr) const {
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guarantee(thr != NULL, "No thread");
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int lgrp_id = thr->lgrp_id();
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assert(lgrp_id != -1, "No lgrp_id set");
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int i = lgrp_spaces()->find(&lgrp_id, LGRPSpace::equals);
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if (i == -1) {
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return 0;
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}
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return lgrp_spaces()->at(i)->space()->capacity_in_bytes();
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}
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size_t MutableNUMASpace::unsafe_max_tlab_alloc(Thread *thr) const {
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guarantee(thr != NULL, "No thread");
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int lgrp_id = thr->lgrp_id();
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assert(lgrp_id != -1, "No lgrp_id set");
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int i = lgrp_spaces()->find(&lgrp_id, LGRPSpace::equals);
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if (i == -1) {
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return 0;
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}
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return lgrp_spaces()->at(i)->space()->free_in_bytes();
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}
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// Check if the NUMA topology has changed. Add and remove spaces if needed.
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// The update can be forced by setting the force parameter equal to true.
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bool MutableNUMASpace::update_layout(bool force) {
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// Check if the topology had changed.
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bool changed = os::numa_topology_changed();
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if (force || changed) {
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// Compute lgrp intersection. Add/remove spaces.
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int lgrp_limit = (int)os::numa_get_groups_num();
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int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit);
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int lgrp_num = (int)os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
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assert(lgrp_num > 0, "There should be at least one locality group");
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// Add new spaces for the new nodes
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for (int i = 0; i < lgrp_num; i++) {
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bool found = false;
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for (int j = 0; j < lgrp_spaces()->length(); j++) {
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if (lgrp_spaces()->at(j)->lgrp_id() == lgrp_ids[i]) {
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found = true;
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break;
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}
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}
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if (!found) {
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lgrp_spaces()->append(new LGRPSpace(lgrp_ids[i]));
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}
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}
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// Remove spaces for the removed nodes.
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for (int i = 0; i < lgrp_spaces()->length();) {
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bool found = false;
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for (int j = 0; j < lgrp_num; j++) {
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if (lgrp_spaces()->at(i)->lgrp_id() == lgrp_ids[j]) {
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found = true;
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break;
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}
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}
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if (!found) {
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delete lgrp_spaces()->at(i);
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lgrp_spaces()->remove_at(i);
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} else {
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i++;
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}
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}
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FREE_C_HEAP_ARRAY(int, lgrp_ids);
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if (changed) {
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for (JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
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thread->set_lgrp_id(-1);
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}
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}
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return true;
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}
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return false;
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}
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// Bias region towards the first-touching lgrp. Set the right page sizes.
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void MutableNUMASpace::bias_region(MemRegion mr, int lgrp_id) {
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HeapWord *start = (HeapWord*)round_to((intptr_t)mr.start(), page_size());
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HeapWord *end = (HeapWord*)round_down((intptr_t)mr.end(), page_size());
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if (end > start) {
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MemRegion aligned_region(start, end);
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assert((intptr_t)aligned_region.start() % page_size() == 0 &&
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(intptr_t)aligned_region.byte_size() % page_size() == 0, "Bad alignment");
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assert(region().contains(aligned_region), "Sanity");
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// First we tell the OS which page size we want in the given range. The underlying
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// large page can be broken down if we require small pages.
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os::realign_memory((char*)aligned_region.start(), aligned_region.byte_size(), page_size());
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// Then we uncommit the pages in the range.
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os::free_memory((char*)aligned_region.start(), aligned_region.byte_size());
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// And make them local/first-touch biased.
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os::numa_make_local((char*)aligned_region.start(), aligned_region.byte_size(), lgrp_id);
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}
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}
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// Free all pages in the region.
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void MutableNUMASpace::free_region(MemRegion mr) {
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HeapWord *start = (HeapWord*)round_to((intptr_t)mr.start(), page_size());
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HeapWord *end = (HeapWord*)round_down((intptr_t)mr.end(), page_size());
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if (end > start) {
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MemRegion aligned_region(start, end);
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assert((intptr_t)aligned_region.start() % page_size() == 0 &&
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(intptr_t)aligned_region.byte_size() % page_size() == 0, "Bad alignment");
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assert(region().contains(aligned_region), "Sanity");
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os::free_memory((char*)aligned_region.start(), aligned_region.byte_size());
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}
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}
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// Update space layout. Perform adaptation.
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void MutableNUMASpace::update() {
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if (update_layout(false)) {
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// If the topology has changed, make all chunks zero-sized.
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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MutableSpace *s = lgrp_spaces()->at(i)->space();
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s->set_end(s->bottom());
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s->set_top(s->bottom());
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}
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initialize(region(), true);
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} else {
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bool should_initialize = false;
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if (!os::numa_has_static_binding()) {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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if (!lgrp_spaces()->at(i)->invalid_region().is_empty()) {
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should_initialize = true;
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break;
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}
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}
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}
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if (should_initialize ||
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(UseAdaptiveNUMAChunkSizing && adaptation_cycles() < samples_count())) {
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initialize(region(), true);
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}
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}
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if (NUMAStats) {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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lgrp_spaces()->at(i)->accumulate_statistics(page_size());
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}
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}
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scan_pages(NUMAPageScanRate);
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}
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// Scan pages. Free pages that have smaller size or wrong placement.
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void MutableNUMASpace::scan_pages(size_t page_count)
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{
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size_t pages_per_chunk = page_count / lgrp_spaces()->length();
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if (pages_per_chunk > 0) {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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LGRPSpace *ls = lgrp_spaces()->at(i);
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ls->scan_pages(page_size(), pages_per_chunk);
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}
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}
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}
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// Accumulate statistics about the allocation rate of each lgrp.
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void MutableNUMASpace::accumulate_statistics() {
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if (UseAdaptiveNUMAChunkSizing) {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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lgrp_spaces()->at(i)->sample();
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}
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increment_samples_count();
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}
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if (NUMAStats) {
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for (int i = 0; i < lgrp_spaces()->length(); i++) {
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lgrp_spaces()->at(i)->accumulate_statistics(page_size());
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}
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}
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}
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// Get the current size of a chunk.
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// This function computes the size of the chunk based on the
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// difference between chunk ends. This allows it to work correctly in
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// case the whole space is resized and during the process of adaptive
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// chunk resizing.
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size_t MutableNUMASpace::current_chunk_size(int i) {
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HeapWord *cur_end, *prev_end;
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if (i == 0) {
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prev_end = bottom();
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} else {
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prev_end = lgrp_spaces()->at(i - 1)->space()->end();
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}
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if (i == lgrp_spaces()->length() - 1) {
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cur_end = end();
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} else {
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cur_end = lgrp_spaces()->at(i)->space()->end();
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}
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if (cur_end > prev_end) {
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return pointer_delta(cur_end, prev_end, sizeof(char));
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}
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return 0;
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}
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// Return the default chunk size by equally diving the space.
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// page_size() aligned.
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size_t MutableNUMASpace::default_chunk_size() {
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return base_space_size() / lgrp_spaces()->length() * page_size();
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}
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// Produce a new chunk size. page_size() aligned.
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size_t MutableNUMASpace::adaptive_chunk_size(int i, size_t limit) {
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size_t pages_available = base_space_size();
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for (int j = 0; j < i; j++) {
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pages_available -= round_down(current_chunk_size(j), page_size()) / page_size();
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}
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pages_available -= lgrp_spaces()->length() - i - 1;
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assert(pages_available > 0, "No pages left");
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float alloc_rate = 0;
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for (int j = i; j < lgrp_spaces()->length(); j++) {
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alloc_rate += lgrp_spaces()->at(j)->alloc_rate()->average();
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}
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size_t chunk_size = 0;
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if (alloc_rate > 0) {
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LGRPSpace *ls = lgrp_spaces()->at(i);
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chunk_size = (size_t)(ls->alloc_rate()->average() * pages_available / alloc_rate) * page_size();
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}
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chunk_size = MAX2(chunk_size, page_size());
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if (limit > 0) {
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limit = round_down(limit, page_size());
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if (chunk_size > current_chunk_size(i)) {
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chunk_size = MIN2((off_t)chunk_size, (off_t)current_chunk_size(i) + (off_t)limit);
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} else {
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chunk_size = MAX2((off_t)chunk_size, (off_t)current_chunk_size(i) - (off_t)limit);
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}
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}
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assert(chunk_size <= pages_available * page_size(), "Chunk size out of range");
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return chunk_size;
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}
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// Return the bottom_region and the top_region. Align them to page_size() boundary.
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// |------------------new_region---------------------------------|
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// |----bottom_region--|---intersection---|------top_region------|
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void MutableNUMASpace::select_tails(MemRegion new_region, MemRegion intersection,
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MemRegion* bottom_region, MemRegion *top_region) {
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// Is there bottom?
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if (new_region.start() < intersection.start()) { // Yes
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// Try to coalesce small pages into a large one.
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if (UseLargePages && page_size() >= os::large_page_size()) {
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|
368 |
HeapWord* p = (HeapWord*)round_to((intptr_t) intersection.start(), os::large_page_size());
|
|
369 |
if (new_region.contains(p)
|
|
370 |
&& pointer_delta(p, new_region.start(), sizeof(char)) >= os::large_page_size()) {
|
|
371 |
if (intersection.contains(p)) {
|
|
372 |
intersection = MemRegion(p, intersection.end());
|
|
373 |
} else {
|
|
374 |
intersection = MemRegion(p, p);
|
|
375 |
}
|
|
376 |
}
|
|
377 |
}
|
|
378 |
*bottom_region = MemRegion(new_region.start(), intersection.start());
|
|
379 |
} else {
|
|
380 |
*bottom_region = MemRegion();
|
|
381 |
}
|
|
382 |
|
|
383 |
// Is there top?
|
|
384 |
if (intersection.end() < new_region.end()) { // Yes
|
|
385 |
// Try to coalesce small pages into a large one.
|
|
386 |
if (UseLargePages && page_size() >= os::large_page_size()) {
|
|
387 |
HeapWord* p = (HeapWord*)round_down((intptr_t) intersection.end(), os::large_page_size());
|
|
388 |
if (new_region.contains(p)
|
|
389 |
&& pointer_delta(new_region.end(), p, sizeof(char)) >= os::large_page_size()) {
|
|
390 |
if (intersection.contains(p)) {
|
|
391 |
intersection = MemRegion(intersection.start(), p);
|
|
392 |
} else {
|
|
393 |
intersection = MemRegion(p, p);
|
|
394 |
}
|
|
395 |
}
|
|
396 |
}
|
|
397 |
*top_region = MemRegion(intersection.end(), new_region.end());
|
|
398 |
} else {
|
|
399 |
*top_region = MemRegion();
|
|
400 |
}
|
|
401 |
}
|
|
402 |
|
|
403 |
// Try to merge the invalid region with the bottom or top region by decreasing
|
|
404 |
// the intersection area. Return the invalid_region aligned to the page_size()
|
|
405 |
// boundary if it's inside the intersection. Return non-empty invalid_region
|
|
406 |
// if it lies inside the intersection (also page-aligned).
|
|
407 |
// |------------------new_region---------------------------------|
|
|
408 |
// |----------------|-------invalid---|--------------------------|
|
|
409 |
// |----bottom_region--|---intersection---|------top_region------|
|
|
410 |
void MutableNUMASpace::merge_regions(MemRegion new_region, MemRegion* intersection,
|
|
411 |
MemRegion *invalid_region) {
|
|
412 |
if (intersection->start() >= invalid_region->start() && intersection->contains(invalid_region->end())) {
|
|
413 |
*intersection = MemRegion(invalid_region->end(), intersection->end());
|
|
414 |
*invalid_region = MemRegion();
|
|
415 |
} else
|
|
416 |
if (intersection->end() <= invalid_region->end() && intersection->contains(invalid_region->start())) {
|
|
417 |
*intersection = MemRegion(intersection->start(), invalid_region->start());
|
|
418 |
*invalid_region = MemRegion();
|
|
419 |
} else
|
|
420 |
if (intersection->equals(*invalid_region) || invalid_region->contains(*intersection)) {
|
|
421 |
*intersection = MemRegion(new_region.start(), new_region.start());
|
|
422 |
*invalid_region = MemRegion();
|
|
423 |
} else
|
|
424 |
if (intersection->contains(invalid_region)) {
|
|
425 |
// That's the only case we have to make an additional bias_region() call.
|
|
426 |
HeapWord* start = invalid_region->start();
|
|
427 |
HeapWord* end = invalid_region->end();
|
|
428 |
if (UseLargePages && page_size() >= os::large_page_size()) {
|
|
429 |
HeapWord *p = (HeapWord*)round_down((intptr_t) start, os::large_page_size());
|
|
430 |
if (new_region.contains(p)) {
|
|
431 |
start = p;
|
|
432 |
}
|
|
433 |
p = (HeapWord*)round_to((intptr_t) end, os::large_page_size());
|
|
434 |
if (new_region.contains(end)) {
|
|
435 |
end = p;
|
|
436 |
}
|
|
437 |
}
|
|
438 |
if (intersection->start() > start) {
|
|
439 |
*intersection = MemRegion(start, intersection->end());
|
|
440 |
}
|
|
441 |
if (intersection->end() < end) {
|
|
442 |
*intersection = MemRegion(intersection->start(), end);
|
|
443 |
}
|
|
444 |
*invalid_region = MemRegion(start, end);
|
|
445 |
}
|
|
446 |
}
|
|
447 |
|
|
448 |
void MutableNUMASpace::initialize(MemRegion mr, bool clear_space) {
|
|
449 |
assert(clear_space, "Reallocation will destory data!");
|
|
450 |
assert(lgrp_spaces()->length() > 0, "There should be at least one space");
|
|
451 |
|
|
452 |
MemRegion old_region = region(), new_region;
|
|
453 |
set_bottom(mr.start());
|
|
454 |
set_end(mr.end());
|
|
455 |
MutableSpace::set_top(bottom());
|
|
456 |
|
|
457 |
// Compute chunk sizes
|
|
458 |
size_t prev_page_size = page_size();
|
|
459 |
set_page_size(UseLargePages ? os::large_page_size() : os::vm_page_size());
|
|
460 |
HeapWord* rounded_bottom = (HeapWord*)round_to((intptr_t) bottom(), page_size());
|
|
461 |
HeapWord* rounded_end = (HeapWord*)round_down((intptr_t) end(), page_size());
|
|
462 |
size_t base_space_size_pages = pointer_delta(rounded_end, rounded_bottom, sizeof(char)) / page_size();
|
|
463 |
|
|
464 |
// Try small pages if the chunk size is too small
|
|
465 |
if (base_space_size_pages / lgrp_spaces()->length() == 0
|
|
466 |
&& page_size() > (size_t)os::vm_page_size()) {
|
|
467 |
set_page_size(os::vm_page_size());
|
|
468 |
rounded_bottom = (HeapWord*)round_to((intptr_t) bottom(), page_size());
|
|
469 |
rounded_end = (HeapWord*)round_down((intptr_t) end(), page_size());
|
|
470 |
base_space_size_pages = pointer_delta(rounded_end, rounded_bottom, sizeof(char)) / page_size();
|
|
471 |
}
|
|
472 |
guarantee(base_space_size_pages / lgrp_spaces()->length() > 0, "Space too small");
|
|
473 |
set_base_space_size(base_space_size_pages);
|
|
474 |
|
|
475 |
// Handle space resize
|
|
476 |
MemRegion top_region, bottom_region;
|
|
477 |
if (!old_region.equals(region())) {
|
|
478 |
new_region = MemRegion(rounded_bottom, rounded_end);
|
|
479 |
MemRegion intersection = new_region.intersection(old_region);
|
|
480 |
if (intersection.start() == NULL ||
|
|
481 |
intersection.end() == NULL ||
|
|
482 |
prev_page_size > page_size()) { // If the page size got smaller we have to change
|
|
483 |
// the page size preference for the whole space.
|
|
484 |
intersection = MemRegion(new_region.start(), new_region.start());
|
|
485 |
}
|
|
486 |
select_tails(new_region, intersection, &bottom_region, &top_region);
|
388
|
487 |
bias_region(bottom_region, lgrp_spaces()->at(0)->lgrp_id());
|
|
488 |
bias_region(top_region, lgrp_spaces()->at(lgrp_spaces()->length() - 1)->lgrp_id());
|
1
|
489 |
}
|
|
490 |
|
|
491 |
// Check if the space layout has changed significantly?
|
|
492 |
// This happens when the space has been resized so that either head or tail
|
|
493 |
// chunk became less than a page.
|
|
494 |
bool layout_valid = UseAdaptiveNUMAChunkSizing &&
|
|
495 |
current_chunk_size(0) > page_size() &&
|
|
496 |
current_chunk_size(lgrp_spaces()->length() - 1) > page_size();
|
|
497 |
|
|
498 |
|
|
499 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
500 |
LGRPSpace *ls = lgrp_spaces()->at(i);
|
|
501 |
MutableSpace *s = ls->space();
|
|
502 |
old_region = s->region();
|
|
503 |
|
|
504 |
size_t chunk_byte_size = 0, old_chunk_byte_size = 0;
|
|
505 |
if (i < lgrp_spaces()->length() - 1) {
|
|
506 |
if (!UseAdaptiveNUMAChunkSizing ||
|
|
507 |
(UseAdaptiveNUMAChunkSizing && NUMAChunkResizeWeight == 0) ||
|
|
508 |
samples_count() < AdaptiveSizePolicyReadyThreshold) {
|
|
509 |
// No adaptation. Divide the space equally.
|
|
510 |
chunk_byte_size = default_chunk_size();
|
|
511 |
} else
|
|
512 |
if (!layout_valid || NUMASpaceResizeRate == 0) {
|
|
513 |
// Fast adaptation. If no space resize rate is set, resize
|
|
514 |
// the chunks instantly.
|
|
515 |
chunk_byte_size = adaptive_chunk_size(i, 0);
|
|
516 |
} else {
|
|
517 |
// Slow adaptation. Resize the chunks moving no more than
|
|
518 |
// NUMASpaceResizeRate bytes per collection.
|
|
519 |
size_t limit = NUMASpaceResizeRate /
|
|
520 |
(lgrp_spaces()->length() * (lgrp_spaces()->length() + 1) / 2);
|
|
521 |
chunk_byte_size = adaptive_chunk_size(i, MAX2(limit * (i + 1), page_size()));
|
|
522 |
}
|
|
523 |
|
|
524 |
assert(chunk_byte_size >= page_size(), "Chunk size too small");
|
|
525 |
assert(chunk_byte_size <= capacity_in_bytes(), "Sanity check");
|
|
526 |
}
|
|
527 |
|
|
528 |
if (i == 0) { // Bottom chunk
|
|
529 |
if (i != lgrp_spaces()->length() - 1) {
|
|
530 |
new_region = MemRegion(bottom(), rounded_bottom + (chunk_byte_size >> LogHeapWordSize));
|
|
531 |
} else {
|
|
532 |
new_region = MemRegion(bottom(), end());
|
|
533 |
}
|
|
534 |
} else
|
|
535 |
if (i < lgrp_spaces()->length() - 1) { // Middle chunks
|
|
536 |
MutableSpace *ps = lgrp_spaces()->at(i - 1)->space();
|
|
537 |
new_region = MemRegion(ps->end(),
|
|
538 |
ps->end() + (chunk_byte_size >> LogHeapWordSize));
|
|
539 |
} else { // Top chunk
|
|
540 |
MutableSpace *ps = lgrp_spaces()->at(i - 1)->space();
|
|
541 |
new_region = MemRegion(ps->end(), end());
|
|
542 |
}
|
|
543 |
guarantee(region().contains(new_region), "Region invariant");
|
|
544 |
|
|
545 |
|
|
546 |
// The general case:
|
|
547 |
// |---------------------|--invalid---|--------------------------|
|
|
548 |
// |------------------new_region---------------------------------|
|
|
549 |
// |----bottom_region--|---intersection---|------top_region------|
|
|
550 |
// |----old_region----|
|
|
551 |
// The intersection part has all pages in place we don't need to migrate them.
|
|
552 |
// Pages for the top and bottom part should be freed and then reallocated.
|
|
553 |
|
|
554 |
MemRegion intersection = old_region.intersection(new_region);
|
|
555 |
|
|
556 |
if (intersection.start() == NULL || intersection.end() == NULL) {
|
|
557 |
intersection = MemRegion(new_region.start(), new_region.start());
|
|
558 |
}
|
|
559 |
|
388
|
560 |
if (!os::numa_has_static_binding()) {
|
|
561 |
MemRegion invalid_region = ls->invalid_region().intersection(new_region);
|
|
562 |
// Invalid region is a range of memory that could've possibly
|
|
563 |
// been allocated on the other node. That's relevant only on Solaris where
|
|
564 |
// there is no static memory binding.
|
|
565 |
if (!invalid_region.is_empty()) {
|
|
566 |
merge_regions(new_region, &intersection, &invalid_region);
|
|
567 |
free_region(invalid_region);
|
|
568 |
ls->set_invalid_region(MemRegion());
|
|
569 |
}
|
1
|
570 |
}
|
388
|
571 |
|
1
|
572 |
select_tails(new_region, intersection, &bottom_region, &top_region);
|
388
|
573 |
|
|
574 |
if (!os::numa_has_static_binding()) {
|
|
575 |
// If that's a system with the first-touch policy then it's enough
|
|
576 |
// to free the pages.
|
|
577 |
free_region(bottom_region);
|
|
578 |
free_region(top_region);
|
|
579 |
} else {
|
|
580 |
// In a system with static binding we have to change the bias whenever
|
|
581 |
// we reshape the heap.
|
|
582 |
bias_region(bottom_region, ls->lgrp_id());
|
|
583 |
bias_region(top_region, ls->lgrp_id());
|
|
584 |
}
|
1
|
585 |
|
|
586 |
// If we clear the region, we would mangle it in debug. That would cause page
|
|
587 |
// allocation in a different place. Hence setting the top directly.
|
|
588 |
s->initialize(new_region, false);
|
|
589 |
s->set_top(s->bottom());
|
|
590 |
|
|
591 |
set_adaptation_cycles(samples_count());
|
|
592 |
}
|
|
593 |
}
|
|
594 |
|
|
595 |
// Set the top of the whole space.
|
|
596 |
// Mark the the holes in chunks below the top() as invalid.
|
|
597 |
void MutableNUMASpace::set_top(HeapWord* value) {
|
|
598 |
bool found_top = false;
|
|
599 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
600 |
LGRPSpace *ls = lgrp_spaces()->at(i);
|
|
601 |
MutableSpace *s = ls->space();
|
|
602 |
HeapWord *top = MAX2((HeapWord*)round_down((intptr_t)s->top(), page_size()), s->bottom());
|
|
603 |
|
|
604 |
if (s->contains(value)) {
|
388
|
605 |
if (!os::numa_has_static_binding() && top < value && top < s->end()) {
|
1
|
606 |
ls->add_invalid_region(MemRegion(top, value));
|
|
607 |
}
|
|
608 |
s->set_top(value);
|
|
609 |
found_top = true;
|
|
610 |
} else {
|
|
611 |
if (found_top) {
|
|
612 |
s->set_top(s->bottom());
|
|
613 |
} else {
|
388
|
614 |
if (!os::numa_has_static_binding() && top < s->end()) {
|
|
615 |
ls->add_invalid_region(MemRegion(top, s->end()));
|
|
616 |
}
|
|
617 |
s->set_top(s->end());
|
1
|
618 |
}
|
|
619 |
}
|
|
620 |
}
|
|
621 |
MutableSpace::set_top(value);
|
|
622 |
}
|
|
623 |
|
|
624 |
void MutableNUMASpace::clear() {
|
|
625 |
MutableSpace::set_top(bottom());
|
|
626 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
627 |
lgrp_spaces()->at(i)->space()->clear();
|
|
628 |
}
|
|
629 |
}
|
|
630 |
|
388
|
631 |
/*
|
|
632 |
Linux supports static memory binding, therefore the most part of the
|
|
633 |
logic dealing with the possible invalid page allocation is effectively
|
|
634 |
disabled. Besides there is no notion of the home node in Linux. A
|
|
635 |
thread is allowed to migrate freely. Although the scheduler is rather
|
|
636 |
reluctant to move threads between the nodes. We check for the current
|
|
637 |
node every allocation. And with a high probability a thread stays on
|
|
638 |
the same node for some time allowing local access to recently allocated
|
|
639 |
objects.
|
|
640 |
*/
|
|
641 |
|
1
|
642 |
HeapWord* MutableNUMASpace::allocate(size_t size) {
|
388
|
643 |
Thread* thr = Thread::current();
|
|
644 |
int lgrp_id = thr->lgrp_id();
|
|
645 |
if (lgrp_id == -1 || !os::numa_has_group_homing()) {
|
1
|
646 |
lgrp_id = os::numa_get_group_id();
|
388
|
647 |
thr->set_lgrp_id(lgrp_id);
|
1
|
648 |
}
|
|
649 |
|
|
650 |
int i = lgrp_spaces()->find(&lgrp_id, LGRPSpace::equals);
|
|
651 |
|
|
652 |
// It is possible that a new CPU has been hotplugged and
|
|
653 |
// we haven't reshaped the space accordingly.
|
|
654 |
if (i == -1) {
|
|
655 |
i = os::random() % lgrp_spaces()->length();
|
|
656 |
}
|
|
657 |
|
|
658 |
MutableSpace *s = lgrp_spaces()->at(i)->space();
|
|
659 |
HeapWord *p = s->allocate(size);
|
|
660 |
|
|
661 |
if (p != NULL && s->free_in_words() < (size_t)oopDesc::header_size()) {
|
|
662 |
s->set_top(s->top() - size);
|
|
663 |
p = NULL;
|
|
664 |
}
|
|
665 |
if (p != NULL) {
|
|
666 |
if (top() < s->top()) { // Keep _top updated.
|
|
667 |
MutableSpace::set_top(s->top());
|
|
668 |
}
|
|
669 |
}
|
388
|
670 |
// Make the page allocation happen here if there is no static binding..
|
|
671 |
if (p != NULL && !os::numa_has_static_binding()) {
|
1
|
672 |
for (HeapWord *i = p; i < p + size; i += os::vm_page_size() >> LogHeapWordSize) {
|
|
673 |
*(int*)i = 0;
|
|
674 |
}
|
|
675 |
}
|
|
676 |
return p;
|
|
677 |
}
|
|
678 |
|
|
679 |
// This version is lock-free.
|
|
680 |
HeapWord* MutableNUMASpace::cas_allocate(size_t size) {
|
388
|
681 |
Thread* thr = Thread::current();
|
|
682 |
int lgrp_id = thr->lgrp_id();
|
|
683 |
if (lgrp_id == -1 || !os::numa_has_group_homing()) {
|
1
|
684 |
lgrp_id = os::numa_get_group_id();
|
388
|
685 |
thr->set_lgrp_id(lgrp_id);
|
1
|
686 |
}
|
|
687 |
|
|
688 |
int i = lgrp_spaces()->find(&lgrp_id, LGRPSpace::equals);
|
|
689 |
// It is possible that a new CPU has been hotplugged and
|
|
690 |
// we haven't reshaped the space accordingly.
|
|
691 |
if (i == -1) {
|
|
692 |
i = os::random() % lgrp_spaces()->length();
|
|
693 |
}
|
|
694 |
MutableSpace *s = lgrp_spaces()->at(i)->space();
|
|
695 |
HeapWord *p = s->cas_allocate(size);
|
|
696 |
if (p != NULL && s->free_in_words() < (size_t)oopDesc::header_size()) {
|
|
697 |
if (s->cas_deallocate(p, size)) {
|
|
698 |
// We were the last to allocate and created a fragment less than
|
|
699 |
// a minimal object.
|
|
700 |
p = NULL;
|
|
701 |
}
|
|
702 |
}
|
|
703 |
if (p != NULL) {
|
|
704 |
HeapWord* cur_top, *cur_chunk_top = p + size;
|
|
705 |
while ((cur_top = top()) < cur_chunk_top) { // Keep _top updated.
|
|
706 |
if (Atomic::cmpxchg_ptr(cur_chunk_top, top_addr(), cur_top) == cur_top) {
|
|
707 |
break;
|
|
708 |
}
|
|
709 |
}
|
|
710 |
}
|
|
711 |
|
388
|
712 |
// Make the page allocation happen here if there is no static binding.
|
|
713 |
if (p != NULL && !os::numa_has_static_binding() ) {
|
1
|
714 |
for (HeapWord *i = p; i < p + size; i += os::vm_page_size() >> LogHeapWordSize) {
|
|
715 |
*(int*)i = 0;
|
|
716 |
}
|
|
717 |
}
|
|
718 |
return p;
|
|
719 |
}
|
|
720 |
|
|
721 |
void MutableNUMASpace::print_short_on(outputStream* st) const {
|
|
722 |
MutableSpace::print_short_on(st);
|
|
723 |
st->print(" (");
|
|
724 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
725 |
st->print("lgrp %d: ", lgrp_spaces()->at(i)->lgrp_id());
|
|
726 |
lgrp_spaces()->at(i)->space()->print_short_on(st);
|
|
727 |
if (i < lgrp_spaces()->length() - 1) {
|
|
728 |
st->print(", ");
|
|
729 |
}
|
|
730 |
}
|
|
731 |
st->print(")");
|
|
732 |
}
|
|
733 |
|
|
734 |
void MutableNUMASpace::print_on(outputStream* st) const {
|
|
735 |
MutableSpace::print_on(st);
|
|
736 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
737 |
LGRPSpace *ls = lgrp_spaces()->at(i);
|
|
738 |
st->print(" lgrp %d", ls->lgrp_id());
|
|
739 |
ls->space()->print_on(st);
|
|
740 |
if (NUMAStats) {
|
|
741 |
st->print(" local/remote/unbiased/uncommitted: %dK/%dK/%dK/%dK, large/small pages: %d/%d\n",
|
|
742 |
ls->space_stats()->_local_space / K,
|
|
743 |
ls->space_stats()->_remote_space / K,
|
|
744 |
ls->space_stats()->_unbiased_space / K,
|
|
745 |
ls->space_stats()->_uncommited_space / K,
|
|
746 |
ls->space_stats()->_large_pages,
|
|
747 |
ls->space_stats()->_small_pages);
|
|
748 |
}
|
|
749 |
}
|
|
750 |
}
|
|
751 |
|
|
752 |
void MutableNUMASpace::verify(bool allow_dirty) const {
|
|
753 |
for (int i = 0; i < lgrp_spaces()->length(); i++) {
|
|
754 |
lgrp_spaces()->at(i)->space()->verify(allow_dirty);
|
|
755 |
}
|
|
756 |
}
|
|
757 |
|
|
758 |
// Scan pages and gather stats about page placement and size.
|
|
759 |
void MutableNUMASpace::LGRPSpace::accumulate_statistics(size_t page_size) {
|
|
760 |
clear_space_stats();
|
|
761 |
char *start = (char*)round_to((intptr_t) space()->bottom(), page_size);
|
|
762 |
char* end = (char*)round_down((intptr_t) space()->end(), page_size);
|
|
763 |
if (start < end) {
|
|
764 |
for (char *p = start; p < end;) {
|
|
765 |
os::page_info info;
|
|
766 |
if (os::get_page_info(p, &info)) {
|
|
767 |
if (info.size > 0) {
|
|
768 |
if (info.size > (size_t)os::vm_page_size()) {
|
|
769 |
space_stats()->_large_pages++;
|
|
770 |
} else {
|
|
771 |
space_stats()->_small_pages++;
|
|
772 |
}
|
|
773 |
if (info.lgrp_id == lgrp_id()) {
|
|
774 |
space_stats()->_local_space += info.size;
|
|
775 |
} else {
|
|
776 |
space_stats()->_remote_space += info.size;
|
|
777 |
}
|
|
778 |
p += info.size;
|
|
779 |
} else {
|
|
780 |
p += os::vm_page_size();
|
|
781 |
space_stats()->_uncommited_space += os::vm_page_size();
|
|
782 |
}
|
|
783 |
} else {
|
|
784 |
return;
|
|
785 |
}
|
|
786 |
}
|
|
787 |
}
|
|
788 |
space_stats()->_unbiased_space = pointer_delta(start, space()->bottom(), sizeof(char)) +
|
|
789 |
pointer_delta(space()->end(), end, sizeof(char));
|
|
790 |
|
|
791 |
}
|
|
792 |
|
|
793 |
// Scan page_count pages and verify if they have the right size and right placement.
|
|
794 |
// If invalid pages are found they are freed in hope that subsequent reallocation
|
|
795 |
// will be more successful.
|
|
796 |
void MutableNUMASpace::LGRPSpace::scan_pages(size_t page_size, size_t page_count)
|
|
797 |
{
|
|
798 |
char* range_start = (char*)round_to((intptr_t) space()->bottom(), page_size);
|
|
799 |
char* range_end = (char*)round_down((intptr_t) space()->end(), page_size);
|
|
800 |
|
|
801 |
if (range_start > last_page_scanned() || last_page_scanned() >= range_end) {
|
|
802 |
set_last_page_scanned(range_start);
|
|
803 |
}
|
|
804 |
|
|
805 |
char *scan_start = last_page_scanned();
|
|
806 |
char* scan_end = MIN2(scan_start + page_size * page_count, range_end);
|
|
807 |
|
|
808 |
os::page_info page_expected, page_found;
|
|
809 |
page_expected.size = page_size;
|
|
810 |
page_expected.lgrp_id = lgrp_id();
|
|
811 |
|
|
812 |
char *s = scan_start;
|
|
813 |
while (s < scan_end) {
|
|
814 |
char *e = os::scan_pages(s, (char*)scan_end, &page_expected, &page_found);
|
|
815 |
if (e == NULL) {
|
|
816 |
break;
|
|
817 |
}
|
|
818 |
if (e != scan_end) {
|
|
819 |
if ((page_expected.size != page_size || page_expected.lgrp_id != lgrp_id())
|
|
820 |
&& page_expected.size != 0) {
|
|
821 |
os::free_memory(s, pointer_delta(e, s, sizeof(char)));
|
|
822 |
}
|
|
823 |
page_expected = page_found;
|
|
824 |
}
|
|
825 |
s = e;
|
|
826 |
}
|
|
827 |
|
|
828 |
set_last_page_scanned(scan_end);
|
|
829 |
}
|