author | stuefe |
Tue, 26 Nov 2019 11:29:20 +0100 | |
branch | stuefe-new-metaspace-branch |
changeset 59271 | 1558266946de |
parent 59238 | 6ce12ce00d3e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2019, SAP SE. All rights reserved. |
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* Copyright (c) 2019, Oracle and/or its affiliates. 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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#include "precompiled.hpp" |
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//#define LOG_PLEASE |
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#include "metaspaceTestsCommon.hpp" |
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#define CHECK_LOM_CONTENT(lom, num_blocks_expected, word_size_expected) \ |
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{ \ |
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if (word_size_expected > 0) { \ |
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EXPECT_FALSE(lom.is_empty()); \ |
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} else { \ |
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EXPECT_TRUE(lom.is_empty()); \ |
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} \ |
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EXPECT_EQ(lom.total_word_size(), (size_t)word_size_expected); \ |
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metaspace::block_stats_t s; \ |
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memset(&s, 0xDD, sizeof(s)); \ |
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lom.statistics(&s); \ |
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EXPECT_EQ((size_t)word_size_expected, s.word_size); \ |
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if (num_blocks_expected >= 0) { \ |
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EXPECT_EQ(num_blocks_expected, s.num_blocks); \ |
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} \ |
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} |
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class LeftOverBinsTest { |
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FeederBuffer _fb; |
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LeftOverManager _lom; |
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// random generator for block feeding |
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RandSizeGenerator _rgen_feeding; |
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// random generator for allocations (and, hence, deallocations) |
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RandSizeGenerator _rgen_allocations; |
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SizeCounter _allocated_words; |
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struct allocation_t { |
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allocation_t* next; |
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size_t word_size; |
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MetaWord* p; |
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}; |
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// Array of the same size as the pool max capacity; holds the allocated elements. |
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allocation_t* _allocations; |
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int _num_allocs; |
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int _num_deallocs; |
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int _num_feeds; |
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bool feed_some() { |
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size_t word_size = _rgen_feeding.get(); |
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MetaWord* p = _fb.get(word_size); |
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if (p != NULL) { |
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_lom.add_block(p, word_size); |
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return true; |
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} |
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return false; |
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} |
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void deallocate_top() { |
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allocation_t* a = _allocations; |
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if (a != NULL) { |
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_allocations = a->next; |
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check_marked_range(a->p, a->word_size); |
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_lom.add_block(a->p, a->word_size); |
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delete a; |
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DEBUG_ONLY(_lom.verify();) |
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} |
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} |
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bool allocate() { |
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size_t word_size = MAX2(_rgen_allocations.get(), _lom.minimal_word_size()); |
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MetaWord* p = _lom.get_block(word_size); |
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if (p != NULL) { |
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_allocated_words.increment_by(word_size); |
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allocation_t* a = new allocation_t; |
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a->p = p; a->word_size = word_size; |
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a->next = _allocations; |
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_allocations = a; |
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DEBUG_ONLY(_lom.verify();) |
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mark_range(p, word_size); |
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return true; |
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} |
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return false; |
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} |
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void test_all_marked_ranges() { |
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for (allocation_t* a = _allocations; a != NULL; a = a->next) { |
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check_marked_range(a->p, a->word_size); |
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} |
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} |
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void test_loop() { |
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// We loop and in each iteration execute one of three operations: |
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// - allocation from lom |
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// - deallocation to lom of a previously allocated block |
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// - feeding a new larger block into the lom (mimicks chunk retiring) |
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// When we have fed all large blocks into the lom (feedbuffer empty), we |
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// switch to draining the lom completely (only allocs) |
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bool forcefeed = false; |
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bool draining = false; |
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bool stop = false; |
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int iter = 100000; // safety stop |
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while (!stop && iter > 0) { |
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iter --; |
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int surprise = (int)os::random() % 10; |
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if (!draining && (surprise >= 7 || forcefeed)) { |
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forcefeed = false; |
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if (feed_some()) { |
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_num_feeds ++; |
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} else { |
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// We fed all input memory into the LOM. Now lets proceed until the lom is drained. |
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draining = true; |
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} |
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} else if (!draining && surprise < 1) { |
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deallocate_top(); |
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_num_deallocs ++; |
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} else { |
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if (allocate()) { |
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_num_allocs ++; |
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} else { |
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if (draining) { |
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stop = _lom.total_word_size() < 512; |
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} else { |
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forcefeed = true; |
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} |
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} |
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} |
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if ((iter % 1000) == 0) { |
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DEBUG_ONLY(_lom.verify();) |
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test_all_marked_ranges(); |
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LOG("a %d (" SIZE_FORMAT "), d %d, f %d", _num_allocs, _allocated_words.get(), _num_deallocs, _num_feeds); |
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#ifdef LOG_PLEASE |
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_lom.print(tty, true); |
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tty->cr(); |
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#endif |
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} |
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} |
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// Drain |
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169 |
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} |
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172 |
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173 |
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public: |
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LeftOverBinsTest(size_t avg_alloc_size) : |
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_fb(512 * K), _lom(), |
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_rgen_feeding(128, 4096), |
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_rgen_allocations(avg_alloc_size / 4, avg_alloc_size * 2, 0.01f, avg_alloc_size / 3, avg_alloc_size * 30), |
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_allocations(NULL), |
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_num_allocs(0), _num_deallocs(0), _num_feeds(0) |
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{ |
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CHECK_LOM_CONTENT(_lom, 0, 0); |
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// some initial feeding |
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_lom.add_block(_fb.get(1024), 1024); |
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CHECK_LOM_CONTENT(_lom, 1, 1024); |
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} |
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188 |
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189 |
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static void test_small_allocations() { |
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LeftOverBinsTest test(10); |
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test.test_loop(); |
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193 |
} |
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194 |
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static void test_medium_allocations() { |
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LeftOverBinsTest test(30); |
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test.test_loop(); |
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198 |
} |
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199 |
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static void test_large_allocations() { |
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201 |
LeftOverBinsTest test(150); |
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202 |
test.test_loop(); |
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203 |
} |
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204 |
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205 |
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206 |
}; |
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207 |
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208 |
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TEST_VM(metaspace, leftoverbins_basics) { |
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210 |
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211 |
LeftOverManager lom; |
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MetaWord tmp[1024]; |
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metaspace::block_stats_t stats; |
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CHECK_LOM_CONTENT(lom, 0, 0); |
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215 |
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lom.add_block(tmp, 1024); |
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DEBUG_ONLY(lom.verify();) |
59271 | 218 |
ASSERT_FALSE(lom.is_empty()); |
219 |
CHECK_LOM_CONTENT(lom, 1, 1024); |
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MetaWord* p = lom.get_block(1024); |
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EXPECT_EQ(p, tmp); |
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DEBUG_ONLY(lom.verify();) |
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CHECK_LOM_CONTENT(lom, 0, 0); |
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226 |
} |
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TEST_VM(metaspace, leftoverbins_small) { |
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229 |
LeftOverBinsTest::test_small_allocations(); |
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230 |
} |
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231 |
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TEST_VM(metaspace, leftoverbins_medium) { |
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233 |
LeftOverBinsTest::test_medium_allocations(); |
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234 |
} |
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235 |
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TEST_VM(metaspace, leftoverbins_large) { |
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237 |
LeftOverBinsTest::test_large_allocations(); |
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238 |
} |
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239 |