154 lines
3.9 KiB
C++
154 lines
3.9 KiB
C++
/*
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* Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020 SAP SE. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "memory/metaspace/chunkHeaderPool.hpp"
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#include "memory/metaspace/counters.hpp"
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#include "memory/metaspace/metachunk.hpp"
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//#define LOG_PLEASE
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#include "metaspaceGtestCommon.hpp"
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using metaspace::ChunkHeaderPool;
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using metaspace::Metachunk;
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using metaspace::SizeCounter;
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class ChunkHeaderPoolTest {
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static const size_t max_cap = 0x1000;
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ChunkHeaderPool _pool;
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// Array of the same size as the pool max capacity; holds the allocated elements.
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Metachunk* _elems[max_cap];
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SizeCounter _num_allocated;
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void attempt_free_at(size_t index) {
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LOG("attempt_free_at " SIZE_FORMAT ".", index);
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if (_elems[index] == nullptr) {
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return;
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}
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_pool.return_chunk_header(_elems[index]);
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_elems[index] = nullptr;
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_num_allocated.decrement();
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DEBUG_ONLY(_num_allocated.check(_pool.used());)
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DEBUG_ONLY(_pool.verify();)
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}
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void attempt_allocate_at(size_t index) {
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LOG("attempt_allocate_at " SIZE_FORMAT ".", index);
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if (_elems[index] != nullptr) {
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return;
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}
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Metachunk* c = _pool.allocate_chunk_header();
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EXPECT_NOT_NULL(c);
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_elems[index] = c;
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c->set_free();
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_num_allocated.increment();
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DEBUG_ONLY(_num_allocated.check(_pool.used());)
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DEBUG_ONLY(_pool.verify();)
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}
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void attempt_allocate_or_free_at(size_t index) {
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if (_elems[index] == nullptr) {
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attempt_allocate_at(index);
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} else {
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attempt_free_at(index);
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}
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}
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// Randomly allocate from the pool and free. Slight preference for allocation.
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void test_random_alloc_free(int num_iterations) {
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for (int iter = 0; iter < num_iterations; iter++) {
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size_t index = (size_t)os::random() % max_cap;
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attempt_allocate_or_free_at(index);
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}
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DEBUG_ONLY(_pool.verify();)
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}
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static void test_once() {
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ChunkHeaderPoolTest test;
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test.test_random_alloc_free(100);
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}
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public:
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ChunkHeaderPoolTest() : _pool() {
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memset(_elems, 0, sizeof(_elems));
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}
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static void run_tests() {
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for (int i = 0; i < 1000; i++) {
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test_once();
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}
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}
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};
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TEST_VM(metaspace, chunk_header_pool_basics) {
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ChunkHeaderPool pool;
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EXPECT_EQ(pool.used(), (int)0);
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EXPECT_EQ(pool.freelist_size(), (int)0);
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Metachunk* header = pool.allocate_chunk_header();
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EXPECT_NOT_NULL(header);
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EXPECT_EQ(pool.used(), 1);
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EXPECT_EQ(pool.freelist_size(), (int)0);
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header->set_free();
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pool.return_chunk_header(header);
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EXPECT_EQ(pool.used(), (int)0);
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EXPECT_EQ(pool.freelist_size(), 1);
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header = pool.allocate_chunk_header();
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EXPECT_NOT_NULL(header);
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EXPECT_EQ(pool.used(), 1);
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EXPECT_EQ(pool.freelist_size(), (int)0);
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header->set_free();
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pool.return_chunk_header(header);
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EXPECT_EQ(pool.used(), (int)0);
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EXPECT_EQ(pool.freelist_size(), 1);
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}
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TEST_VM(metaspace, chunk_header_pool) {
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ChunkHeaderPoolTest::run_tests();
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}
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