1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 #include "precompiled.hpp"
25 #include "memory/virtualspace.hpp"
26 #include "runtime/os.hpp"
27 #include "oops/oop.hpp"
28 #include "utilities/align.hpp"
29 #include "unittest.hpp"
30
31 #if 0
32
33 namespace {
34 class MemoryReleaser {
35 ReservedSpace* const _rs;
36 public:
37 MemoryReleaser(ReservedSpace* rs) : _rs(rs) { }
38 ~MemoryReleaser() {
39 if (_rs->special()) {
40 EXPECT_TRUE(os::release_memory_special(_rs->base(), _rs->size()));
41 } else {
42 EXPECT_TRUE(os::release_memory(_rs->base(), _rs->size()));
43 }
44 }
45 };
46
47 static void small_page_write(void* addr, size_t size) {
48 size_t page_size = os::vm_page_size();
49
50 char* end = (char*) addr + size;
51 for (char* p = (char*) addr; p < end; p += page_size) {
52 *p = 1;
53 }
54 }
55
56 // have to use these functions, as gtest's _PRED macros don't like is_aligned
57 // nor (is_aligned<size_t, size_t>)
58 static bool is_size_aligned(size_t size, size_t alignment) {
59 return is_aligned(size, alignment);
60 }
61 static bool is_ptr_aligned(void* ptr, size_t alignment) {
62 return is_aligned(ptr, alignment);
63 }
64
65 static void test_reserved_size(size_t size) {
66 ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity());
67
68 ReservedSpace rs(size);
69 MemoryReleaser releaser(&rs);
70
71 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
72 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
73
74 if (rs.special()) {
75 small_page_write(rs.base(), size);
76 }
77 }
78
79 static void test_reserved_size_alignment(size_t size, size_t alignment) {
80 ASSERT_PRED2(is_size_aligned, size, alignment) << "Incorrect input parameters";
81
82 ReservedSpace rs(size, alignment, UseLargePages, (char *) NULL);
83
84 ASSERT_TRUE(rs.base() != NULL) << "rs.special = " << rs.special();
85 ASSERT_EQ(size, rs.size()) << "rs.special = " << rs.special();
86
87 EXPECT_PRED2(is_ptr_aligned, rs.base(), alignment)
88 << "aligned sizes should always give aligned addresses";
89 EXPECT_PRED2(is_ptr_aligned, (void*) rs.size(), alignment)
90 << "aligned sizes should always give aligned addresses";
91
92 if (rs.special()) {
93 small_page_write(rs.base(), size);
94 }
95 }
96
97 static void test_reserved_size_alignment_page_type(size_t size, size_t alignment, bool maybe_large) {
98 if (size < alignment) {
99 // Tests might set -XX:LargePageSizeInBytes=<small pages> and cause unexpected input arguments for this test.
100 ASSERT_EQ((size_t) os::vm_page_size(), os::large_page_size()) << "Test needs further refinement";
101 return;
102 }
103
104 ASSERT_PRED2(is_size_aligned, size, os::vm_allocation_granularity()) << "Must be at least AG aligned";
105 ASSERT_PRED2(is_size_aligned, size, alignment) << "Must be at least AG aligned";
106
107 bool large = maybe_large && UseLargePages && size >= os::large_page_size();
108
109 ReservedSpace rs(size, alignment, large, false);
110 MemoryReleaser releaser(&rs);
111
112 EXPECT_TRUE(rs.base() != NULL) << "rs.special: " << rs.special();
113 EXPECT_EQ(size, rs.size()) << "rs.special: " << rs.special();
114
115 if (rs.special()) {
116 small_page_write(rs.base(), size);
117 }
118 }
119 }
120
121 TEST_VM(ReservedSpace, size_alignment) {
122 size_t size = 2 * 1024 * 1024;
123 size_t ag = os::vm_allocation_granularity();
124
125 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size, ag));
126 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 2, ag));
127 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment(size * 10, ag));
128 }
129
130 TEST_VM(ReservedSpace, size) {
131 size_t size = 2 * 1024 * 1024;
132 size_t ag = os::vm_allocation_granularity();
133
134 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 1));
135 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
136 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
137 EXPECT_NO_FATAL_FAILURE(test_reserved_size(ag));
138 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size - ag));
139 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size));
140 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size + ag));
141 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2));
142 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 - ag));
143 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 2 + ag));
144 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3));
145 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 - ag));
146 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 3 + ag));
147 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10));
148 EXPECT_NO_FATAL_FAILURE(test_reserved_size(size * 10 + size / 2));
149 }
150
151 TEST_VM(ReservedSpace, size_alignment_page_type) {
152 size_t ag = os::vm_allocation_granularity();
153
154 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag, ag , false));
155 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag , false));
156 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 3, ag , false));
157 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 2, ag * 2, false));
158 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 2, false));
159 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 2, false));
160 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 4, ag * 4, false));
161 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 8, ag * 4, false));
162 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(ag * 16, ag * 4, false));
163 }
164
165 TEST_VM(ReservedSpace, size_alignment_page_type_large_page) {
166 if (!UseLargePages) {
167 return;
168 }
169
170 size_t ag = os::vm_allocation_granularity();
171 size_t lp = os::large_page_size();
172
173 // Without large pages
174 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4, false));
175 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, false));
176 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, false));
177 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , false));
178 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , false));
179 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , false));
180 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, false));
181 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, false));
182 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, false));
183
184 // With large pages
185 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, ag * 4 , true));
186 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, ag * 4, true));
187 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, ag * 4, true));
188 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp, lp , true));
189 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp , true));
190 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 3, lp , true));
191 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 2, lp * 2, true));
192 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 4, lp * 2, true));
193 EXPECT_NO_FATAL_FAILURE(test_reserved_size_alignment_page_type(lp * 8, lp * 2, true));
194 }
195
196 namespace {
197 enum TestLargePages {
198 Default,
199 Disable,
200 Reserve,
201 Commit
202 };
203
204 class ReservedSpaceReleaser {
205 ReservedSpace* const _rs;
206 public:
207 ReservedSpaceReleaser(ReservedSpace* rs) : _rs(rs) { }
208 ~ReservedSpaceReleaser() {
209 _rs->release();
210 }
211 };
212
213 ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) {
214 switch(mode) {
215 default:
216 case Default:
217 case Reserve:
218 return ReservedSpace(reserve_size_aligned);
219 case Disable:
220 case Commit:
221 return ReservedSpace(reserve_size_aligned,
222 os::vm_allocation_granularity(),
223 /* large */ false, /* exec */ false);
224 }
225 }
226
227 bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) {
228 switch(mode) {
229 default:
230 case Default:
231 case Reserve:
232 return vs.initialize(rs, 0);
233 case Disable:
234 return vs.initialize_with_granularity(rs, 0, os::vm_page_size());
235 case Commit:
236 return vs.initialize_with_granularity(rs, 0, os::page_size_for_region_unaligned(rs.size(), 1));
237 }
238 }
239
240 void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size,
241 TestLargePages mode = Default) {
242 size_t granularity = os::vm_allocation_granularity();
243 size_t reserve_size_aligned = align_up(reserve_size, granularity);
244
245 ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode);
246 ReservedSpaceReleaser releaser(&reserved);
247
248 ASSERT_TRUE(reserved.is_reserved());
249
250 VirtualSpace vs;
251 ASSERT_TRUE(initialize_virtual_space(vs, reserved, mode)) << "Failed to initialize VirtualSpace";
252 vs.expand_by(commit_size, false);
253
254 if (vs.special()) {
255 EXPECT_EQ(reserve_size_aligned, vs.actual_committed_size());
256 } else {
257 EXPECT_GE(vs.actual_committed_size(), commit_size);
258 // Approximate the commit granularity.
259 // Make sure that we don't commit using large pages
260 // if large pages has been disabled for this VirtualSpace.
261 size_t commit_granularity = (mode == Disable || !UseLargePages) ?
262 os::vm_page_size() : os::large_page_size();
263 EXPECT_LT(vs.actual_committed_size(), commit_size + commit_granularity);
264 }
265 }
266 }
267
268 TEST_VM(VirtualSpace, actual_committed_space) {
269 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(4 * K, 0));
270 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(4 * K, 4 * K));
271 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 0));
272 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 4 * K));
273 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(8 * K, 8 * K));
274 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 0));
275 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 4 * K));
276 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 8 * K));
277 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(12 * K, 12 * K));
278 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 0));
279 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 32 * K));
280 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(64 * K, 64 * K));
281 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 0));
282 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 4 * K));
283 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 64 * K));
284 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 1 * M));
285 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(2 * M, 2 * M));
286 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0));
287 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K));
288 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K));
289 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M));
290 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M));
291 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M));
292 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M));
293 }
294
295 TEST_VM(VirtualSpace, actual_committed_space_one_large_page) {
296 if (!UseLargePages) {
297 return;
298 }
299
300 size_t large_page_size = os::large_page_size();
301
302 ReservedSpace reserved(large_page_size, large_page_size, true, false);
303 ReservedSpaceReleaser releaser(&reserved);
304 ASSERT_TRUE(reserved.is_reserved());
305
306 VirtualSpace vs;
307 ASSERT_TRUE(vs.initialize(reserved, 0)) << "Failed to initialize VirtualSpace";
308 vs.expand_by(large_page_size, false);
309
310 EXPECT_EQ(large_page_size, vs.actual_committed_size());
311 }
312
313 TEST_VM(VirtualSpace, disable_large_pages) {
314 if (!UseLargePages) {
315 return;
316 }
317 // These test cases verify that if we force VirtualSpace to disable large pages
318 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Disable));
319 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable));
320 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable));
321 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable));
322 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable));
323 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable));
324 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable));
325
326 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Reserve));
327 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve));
328 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve));
329 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve));
330 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve));
331 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve));
332 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve));
333
334 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 0, Commit));
335 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit));
336 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit));
337 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit));
338 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit));
339 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit));
340 EXPECT_NO_FATAL_FAILURE(test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit));
341 }
342
343
344 #endif
345