118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
/*
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* Copyright (c) 2022 SAP SE. All rights reserved.
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* Copyright (c) 2022, 2024, 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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#include "memory/allocation.hpp"
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#include "nmt/mallocTracker.hpp"
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#include "nmt/memTracker.hpp"
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#include "runtime/os.hpp"
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#include "unittest.hpp"
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// convenience log. switch on if debugging tests. Don't use tty, plain stdio only.
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//#define LOG(...) { printf(__VA_ARGS__); printf("\n"); fflush(stdout); }
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#define LOG(...)
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static size_t get_total_malloc_invocs() {
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return MallocMemorySummary::as_snapshot()->total_count();
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}
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static size_t get_total_malloc_size() {
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return MallocMemorySummary::as_snapshot()->total();
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}
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static size_t get_malloc_overhead() {
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return MallocMemorySummary::as_snapshot()->malloc_overhead();
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}
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struct totals_t { size_t n; size_t s; size_t ovrh; };
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static totals_t get_totals() {
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totals_t tot;
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tot.n = get_total_malloc_invocs();
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tot.s = get_total_malloc_size();
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tot.ovrh = get_malloc_overhead();
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return tot;
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}
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// Concurrent code can malloc and free too, therefore we need to compare with a leeway factor
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#define compare_totals(t_real, t_expected) { \
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double leeway_factor = 0.33; \
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size_t leeway_n = (size_t)(((double)t_expected.n) * leeway_factor); \
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size_t leeway_s = (size_t)(((double)t_expected.s) * leeway_factor); \
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EXPECT_GE(t_real.n, t_expected.n - leeway_n); \
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EXPECT_LE(t_real.n, t_expected.n + leeway_n); \
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EXPECT_GE(t_real.s, t_expected.s - leeway_s); \
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EXPECT_LE(t_real.s, t_expected.s + leeway_s); \
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EXPECT_GE(t_real.ovrh, t_expected.ovrh - (leeway_n * sizeof(MallocHeader))); \
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EXPECT_LE(t_real.ovrh, t_expected.ovrh + (leeway_n * sizeof(MallocHeader))); \
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LOG("Deviation: n=" SSIZE_FORMAT ", s=" SSIZE_FORMAT ", ovrh=" SSIZE_FORMAT, \
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(ssize_t)t_real.n - (ssize_t)t_expected.n, \
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(ssize_t)t_real.s - (ssize_t)t_expected.s, \
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(ssize_t)t_real.ovrh - (ssize_t)t_expected.ovrh); \
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}
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TEST_VM(NMTNumbers, totals) {
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if (!MemTracker::enabled()) {
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// Skip test if NMT is disabled
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return;
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}
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const totals_t t1 = get_totals();
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LOG("t1: " SIZE_FORMAT " - " SIZE_FORMAT " - " SIZE_FORMAT, t1.n, t1.s, t1.ovrh);
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static const int NUM_ALLOCS = 1024 * 16;
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static const int ALLOC_SIZE = 1024;
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void* p[NUM_ALLOCS];
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for (int i = 0; i < NUM_ALLOCS; i ++) {
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// spread over categories
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int category = i % (mt_number_of_tags - 1);
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p[i] = NEW_C_HEAP_ARRAY(char, ALLOC_SIZE, (MemTag)category);
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}
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const totals_t t2 = get_totals();
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LOG("t2: " SIZE_FORMAT " - " SIZE_FORMAT " - " SIZE_FORMAT, t2.n, t2.s, t2.ovrh);
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totals_t t2_expected;
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t2_expected.n = t1.n + NUM_ALLOCS;
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t2_expected.s = t1.s + ALLOC_SIZE * NUM_ALLOCS;
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t2_expected.ovrh = (t1.n + NUM_ALLOCS) * sizeof(MallocHeader);
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LOG("t2 expected: " SIZE_FORMAT " - " SIZE_FORMAT " - " SIZE_FORMAT, t2_expected.n, t2_expected.s, t2_expected.ovrh);
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compare_totals(t2, t2_expected);
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for (int i = 0; i < NUM_ALLOCS; i ++) {
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os::free(p[i]);
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}
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const totals_t t3 = get_totals();
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LOG("t3: " SIZE_FORMAT " - " SIZE_FORMAT " - " SIZE_FORMAT, t3.n, t3.s, t3.ovrh);
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compare_totals(t3, t1);
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}
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