/*
* Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2020, 2022 SAP SE. 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
#include "precompiled.hpp"
#include "memory/metaspace/freeChunkList.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ostream.hpp"
namespace metaspace {
// Calculates total number of committed words over all chunks (walks chunks).
size_t FreeChunkList::calc_committed_word_size() const {
size_t s = 0;
for (const Metachunk* c = _first; c != NULL; c = c->next()) {
s += c->committed_words();
}
return s;
}
void FreeChunkList::print_on(outputStream* st) const {
if (_num_chunks.get() > 0) {
for (const Metachunk* c = _first; c != NULL; c = c->next()) {
st->print(" - <");
c->print_on(st);
st->print(">");
}
st->print(" - total : %d chunks.", _num_chunks.get());
} else {
st->print("empty");
}
}
#ifdef ASSERT
bool FreeChunkList::contains(const Metachunk* c) const {
for (Metachunk* c2 = _first; c2 != NULL; c2 = c2->next()) {
if (c2 == c) {
return true;
}
}
return false;
}
void FreeChunkList::verify() const {
if (_first == NULL) {
assert(_last == NULL, "Sanity");
} else {
assert(_last != NULL, "Sanity");
int num = 0;
for (Metachunk* c = _first; c != NULL; c = c->next()) {
assert(c->is_free(), "Chunks in freelist should be free");
assert(c->used_words() == 0, "Chunk in freelist should have not used words.");
assert(c->level() == _first->level(), "wrong level");
assert(c->next() == NULL || c->next()->prev() == c, "front link broken");
assert(c->prev() == NULL || c->prev()->next() == c, "back link broken");
assert(c != c->prev() && c != c->next(), "circle");
c->verify();
num++;
}
_num_chunks.check(num);
}
}
#endif // ASSERT
// Returns total size in all lists (regardless of commit state of underlying memory)
size_t FreeChunkListVector::word_size() const {
size_t sum = 0;
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
sum += list_for_level(l)->num_chunks() * chunklevel::word_size_for_level(l);
}
return sum;
}
// Calculates total number of committed words over all chunks (walks chunks).
size_t FreeChunkListVector::calc_committed_word_size() const {
size_t sum = 0;
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
sum += calc_committed_word_size_at_level(l);
}
return sum;
}
size_t FreeChunkListVector::calc_committed_word_size_at_level(chunklevel_t lvl) const {
return list_for_level(lvl)->calc_committed_word_size();
}
// Returns total committed size in all lists
int FreeChunkListVector::num_chunks() const {
int n = 0;
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
n += list_for_level(l)->num_chunks();
}
return n;
}
// Look for a chunk: starting at level, up to and including max_level,
// return the first chunk whose committed words >= min_committed_words.
// Return NULL if no such chunk was found.
Metachunk* FreeChunkListVector::search_chunk_ascending(chunklevel_t level, chunklevel_t max_level, size_t min_committed_words) {
assert(min_committed_words <= chunklevel::word_size_for_level(max_level),
"min chunk size too small to hold min_committed_words");
for (chunklevel_t l = level; l <= max_level; l++) {
FreeChunkList* list = list_for_level(l);
Metachunk* c = list->first_minimally_committed(min_committed_words);
if (c != NULL) {
list->remove(c);
return c;
}
}
return NULL;
}
// Look for a chunk: starting at level, down to (including) the root chunk level,
// return the first chunk whose committed words >= min_committed_words.
// Return NULL if no such chunk was found.
Metachunk* FreeChunkListVector::search_chunk_descending(chunklevel_t level, size_t min_committed_words) {
for (chunklevel_t l = level; l >= chunklevel::LOWEST_CHUNK_LEVEL; l --) {
FreeChunkList* list = list_for_level(l);
Metachunk* c = list->first_minimally_committed(min_committed_words);
if (c != NULL) {
list->remove(c);
return c;
}
}
return NULL;
}
void FreeChunkListVector::print_on(outputStream* st) const {
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
st->print("-- List[" CHKLVL_FORMAT "]: ", l);
list_for_level(l)->print_on(st);
st->cr();
}
st->print_cr("total chunks: %d, total word size: " SIZE_FORMAT ".",
num_chunks(), word_size());
}
#ifdef ASSERT
void FreeChunkListVector::verify() const {
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
list_for_level(l)->verify();
}
}
bool FreeChunkListVector::contains(const Metachunk* c) const {
for (chunklevel_t l = chunklevel::LOWEST_CHUNK_LEVEL; l <= chunklevel::HIGHEST_CHUNK_LEVEL; l++) {
if (list_for_level(l)->contains(c)) {
return true;
}
}
return false;
}
#endif // ASSERT
} // namespace metaspace
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