9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/allocation.inline.hpp"
27 #include "memory/metaspace.hpp"
28 #include "runtime/mutex.hpp"
29 #include "runtime/os.hpp"
30 #include "utilities/align.hpp"
31 #include "utilities/debug.hpp"
32 #include "utilities/globalDefinitions.hpp"
33 #include "utilities/ostream.hpp"
34 #include "unittest.hpp"
35
36 #define NUM_PARALLEL_METASPACES 50
37 #define MAX_PER_METASPACE_ALLOCATION_WORDSIZE (512 * K)
38
39 //#define DEBUG_VERBOSE true
40
41 #ifdef DEBUG_VERBOSE
42
43 struct chunkmanager_statistics_t {
44 int num_specialized_chunks;
45 int num_small_chunks;
46 int num_medium_chunks;
47 int num_humongous_chunks;
48 };
87
88 virtual void TearDown() {
89 for (int i = 0; i < NUM_PARALLEL_METASPACES; i ++) {
90 if (_spaces[i].space != NULL) {
91 delete _spaces[i].space;
92 delete _spaces[i].lock;
93 }
94 }
95 }
96
97 void create_space(int i) {
98 assert(i >= 0 && i < NUM_PARALLEL_METASPACES, "Sanity");
99 assert(_spaces[i].space == NULL && _spaces[i].allocated == 0, "Sanity");
100 if (_spaces[i].lock == NULL) {
101 _spaces[i].lock = new Mutex(Monitor::native, "gtest-MetaspaceAllocationTest-lock", false, Monitor::_safepoint_check_never);
102 ASSERT_TRUE(_spaces[i].lock != NULL);
103 }
104 // Let every ~10th space be an anonymous one to test different allocation patterns.
105 const Metaspace::MetaspaceType msType = (os::random() % 100 < 10) ?
106 Metaspace::AnonymousMetaspaceType : Metaspace::StandardMetaspaceType;
107 _spaces[i].space = new ClassLoaderMetaspace(_spaces[i].lock, msType);
108 _spaces[i].allocated = 0;
109 ASSERT_TRUE(_spaces[i].space != NULL);
110 }
111
112 // Returns the index of a random space where index is [0..metaspaces) and which is
113 // empty, non-empty or full.
114 // Returns -1 if no matching space exists.
115 enum fillgrade { fg_empty, fg_non_empty, fg_full };
116 int get_random_matching_space(int metaspaces, fillgrade fg) {
117 const int start_index = os::random() % metaspaces;
118 int i = start_index;
119 do {
120 if (fg == fg_empty && _spaces[i].is_empty()) {
121 return i;
122 } else if ((fg == fg_full && _spaces[i].is_full()) ||
123 (fg == fg_non_empty && !_spaces[i].is_full() && !_spaces[i].is_empty())) {
124 return i;
125 }
126 i ++;
127 if (i == metaspaces) {
154 }
155 if (index == -1) {
156 // All spaces are full, switch to freeing.
157 force_switch = true;
158 } else {
159 // create space if it does not yet exist.
160 if (_spaces[index].space == NULL) {
161 create_space(index);
162 }
163 // Allocate a bunch of blocks from it. Mostly small stuff but mix in large allocations
164 // to force humongous chunk allocations.
165 int allocs_done = 0;
166 while (allocs_done < allocs_per_phase && !_spaces[index].is_full()) {
167 size_t size = 0;
168 int r = os::random() % 1000;
169 if ((float)r < probability_for_large_allocations * 1000.0) {
170 size = (os::random() % _chunk_geometry.medium_chunk_word_size) + _chunk_geometry.medium_chunk_word_size;
171 } else {
172 size = os::random() % 64;
173 }
174 MetaWord* const p = _spaces[index].space->allocate(size, mdType);
175 if (p == NULL) {
176 // We very probably did hit the metaspace "until-gc" limit.
177 #ifdef DEBUG_VERBOSE
178 tty->print_cr("OOM for " SIZE_FORMAT " words. ", size);
179 #endif
180 // Just switch to deallocation and resume tests.
181 force_switch = true;
182 break;
183 } else {
184 _spaces[index].allocated += size;
185 allocs_done ++;
186 }
187 }
188 }
189 } else {
190 // freeing: find a metaspace and delete it, with preference for completely filled spaces.
191 int index = get_random_full_space(metaspaces);
192 if (index == -1) {
193 index = get_random_non_emtpy_space(metaspaces);
194 }
195 if (index == -1) {
196 force_switch = true;
197 } else {
198 assert(_spaces[index].space != NULL && _spaces[index].allocated > 0, "Sanity");
199 delete _spaces[index].space;
200 _spaces[index].space = NULL;
201 _spaces[index].allocated = 0;
202 }
203 }
204
205 if (force_switch) {
206 allocating = !allocating;
207 } else {
208 // periodically switch between allocating and freeing, but prefer allocation because
209 // we want to intermingle allocations of multiple metaspaces.
210 allocating = os::random() % 5 < 4;
211 }
212 phases_done ++;
213 #ifdef DEBUG_VERBOSE
214 int metaspaces_in_use = 0;
215 size_t total_allocated = 0;
216 for (int i = 0; i < metaspaces; i ++) {
217 if (_spaces[i].allocated > 0) {
218 total_allocated += _spaces[i].allocated;
|
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/allocation.inline.hpp"
27 #include "memory/metaspace.hpp"
28 #include "runtime/mutex.hpp"
29 #include "runtime/mutexLocker.hpp"
30 #include "runtime/os.hpp"
31 #include "utilities/align.hpp"
32 #include "utilities/debug.hpp"
33 #include "utilities/globalDefinitions.hpp"
34 #include "utilities/ostream.hpp"
35 #include "unittest.hpp"
36
37 #define NUM_PARALLEL_METASPACES 50
38 #define MAX_PER_METASPACE_ALLOCATION_WORDSIZE (512 * K)
39
40 //#define DEBUG_VERBOSE true
41
42 #ifdef DEBUG_VERBOSE
43
44 struct chunkmanager_statistics_t {
45 int num_specialized_chunks;
46 int num_small_chunks;
47 int num_medium_chunks;
48 int num_humongous_chunks;
49 };
88
89 virtual void TearDown() {
90 for (int i = 0; i < NUM_PARALLEL_METASPACES; i ++) {
91 if (_spaces[i].space != NULL) {
92 delete _spaces[i].space;
93 delete _spaces[i].lock;
94 }
95 }
96 }
97
98 void create_space(int i) {
99 assert(i >= 0 && i < NUM_PARALLEL_METASPACES, "Sanity");
100 assert(_spaces[i].space == NULL && _spaces[i].allocated == 0, "Sanity");
101 if (_spaces[i].lock == NULL) {
102 _spaces[i].lock = new Mutex(Monitor::native, "gtest-MetaspaceAllocationTest-lock", false, Monitor::_safepoint_check_never);
103 ASSERT_TRUE(_spaces[i].lock != NULL);
104 }
105 // Let every ~10th space be an anonymous one to test different allocation patterns.
106 const Metaspace::MetaspaceType msType = (os::random() % 100 < 10) ?
107 Metaspace::AnonymousMetaspaceType : Metaspace::StandardMetaspaceType;
108 {
109 // Pull lock during space creation, since this is what happens in the VM too
110 // (see ClassLoaderData::metaspace_non_null(), which we mimick here).
111 MutexLockerEx ml(_spaces[i].lock, Mutex::_no_safepoint_check_flag);
112 _spaces[i].space = new ClassLoaderMetaspace(_spaces[i].lock, msType);
113 }
114 _spaces[i].allocated = 0;
115 ASSERT_TRUE(_spaces[i].space != NULL);
116 }
117
118 // Returns the index of a random space where index is [0..metaspaces) and which is
119 // empty, non-empty or full.
120 // Returns -1 if no matching space exists.
121 enum fillgrade { fg_empty, fg_non_empty, fg_full };
122 int get_random_matching_space(int metaspaces, fillgrade fg) {
123 const int start_index = os::random() % metaspaces;
124 int i = start_index;
125 do {
126 if (fg == fg_empty && _spaces[i].is_empty()) {
127 return i;
128 } else if ((fg == fg_full && _spaces[i].is_full()) ||
129 (fg == fg_non_empty && !_spaces[i].is_full() && !_spaces[i].is_empty())) {
130 return i;
131 }
132 i ++;
133 if (i == metaspaces) {
160 }
161 if (index == -1) {
162 // All spaces are full, switch to freeing.
163 force_switch = true;
164 } else {
165 // create space if it does not yet exist.
166 if (_spaces[index].space == NULL) {
167 create_space(index);
168 }
169 // Allocate a bunch of blocks from it. Mostly small stuff but mix in large allocations
170 // to force humongous chunk allocations.
171 int allocs_done = 0;
172 while (allocs_done < allocs_per_phase && !_spaces[index].is_full()) {
173 size_t size = 0;
174 int r = os::random() % 1000;
175 if ((float)r < probability_for_large_allocations * 1000.0) {
176 size = (os::random() % _chunk_geometry.medium_chunk_word_size) + _chunk_geometry.medium_chunk_word_size;
177 } else {
178 size = os::random() % 64;
179 }
180 // Note: In contrast to space creation, no need to lock here. ClassLoaderMetaspace::allocate() will lock itself.
181 MetaWord* const p = _spaces[index].space->allocate(size, mdType);
182 if (p == NULL) {
183 // We very probably did hit the metaspace "until-gc" limit.
184 #ifdef DEBUG_VERBOSE
185 tty->print_cr("OOM for " SIZE_FORMAT " words. ", size);
186 #endif
187 // Just switch to deallocation and resume tests.
188 force_switch = true;
189 break;
190 } else {
191 _spaces[index].allocated += size;
192 allocs_done ++;
193 }
194 }
195 }
196 } else {
197 // freeing: find a metaspace and delete it, with preference for completely filled spaces.
198 int index = get_random_full_space(metaspaces);
199 if (index == -1) {
200 index = get_random_non_emtpy_space(metaspaces);
201 }
202 if (index == -1) {
203 force_switch = true;
204 } else {
205 assert(_spaces[index].space != NULL && _spaces[index].allocated > 0, "Sanity");
206 // Note: do not lock here. In the "wild" (the VM), we do not so either (see ~ClassLoaderData()).
207 delete _spaces[index].space;
208 _spaces[index].space = NULL;
209 _spaces[index].allocated = 0;
210 }
211 }
212
213 if (force_switch) {
214 allocating = !allocating;
215 } else {
216 // periodically switch between allocating and freeing, but prefer allocation because
217 // we want to intermingle allocations of multiple metaspaces.
218 allocating = os::random() % 5 < 4;
219 }
220 phases_done ++;
221 #ifdef DEBUG_VERBOSE
222 int metaspaces_in_use = 0;
223 size_t total_allocated = 0;
224 for (int i = 0; i < metaspaces; i ++) {
225 if (_spaces[i].allocated > 0) {
226 total_allocated += _spaces[i].allocated;
|