7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "gc/shared/fullGCForwarding.hpp"
28 #include "gc/shared/gcArguments.hpp"
29 #include "gc/shared/tlab_globals.hpp"
30 #include "gc/shared/workerPolicy.hpp"
31 #include "gc/shenandoah/shenandoahArguments.hpp"
32 #include "gc/shenandoah/shenandoahCardTable.hpp"
33 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
34 #include "gc/shenandoah/shenandoahGenerationalHeap.hpp"
35 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
36 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
37 #include "runtime/globals_extension.hpp"
38 #include "runtime/java.hpp"
39 #include "utilities/defaultStream.hpp"
40 #include "utilities/powerOfTwo.hpp"
41
42 void ShenandoahArguments::initialize() {
43 #if !(defined AARCH64 || defined AMD64 || defined PPC64 || defined RISCV64)
44 vm_exit_during_initialization("Shenandoah GC is not supported on this platform.");
45 #endif
46
47 #if 0 // leave this block as stepping stone for future platforms
184 // historical data, assigning more recent data the weight according to TLABAllocationWeight.
185 // Current default is good for generational collectors that run frequent young GCs.
186 // With Shenandoah, GC cycles are much less frequent, so we need we need sizing policy
187 // to converge faster over smaller number of resizing decisions.
188 if (strcmp(ShenandoahGCMode, "generational") && FLAG_IS_DEFAULT(TLABAllocationWeight)) {
189 FLAG_SET_DEFAULT(TLABAllocationWeight, 90);
190 }
191 // In generational mode, let TLABAllocationWeight keeps its default value of 35.
192
193 if (GCCardSizeInBytes < ShenandoahMinCardSizeInBytes) {
194 vm_exit_during_initialization(
195 err_msg("GCCardSizeInBytes ( %u ) must be >= %u\n", GCCardSizeInBytes, (unsigned int) ShenandoahMinCardSizeInBytes));
196 }
197
198 // Gen shen does not support any ShenandoahGCHeuristics value except for the default "adaptive"
199 if ((strcmp(ShenandoahGCMode, "generational") == 0)
200 && strcmp(ShenandoahGCHeuristics, "adaptive") != 0) {
201 log_warning(gc)("Ignoring -XX:ShenandoahGCHeuristics input: %s, because generational shenandoah only"
202 " supports adaptive heuristics", ShenandoahGCHeuristics);
203 }
204
205 FullGCForwarding::initialize_flags(MaxHeapSize);
206 }
207
208 size_t ShenandoahArguments::conservative_max_heap_alignment() {
209 size_t align = next_power_of_2(ShenandoahMaxRegionSize);
210 if (UseLargePages) {
211 align = MAX2(align, os::large_page_size());
212 }
213 return align;
214 }
215
216 void ShenandoahArguments::initialize_alignments() {
217 CardTable::initialize_card_size();
218
219 // Need to setup sizes early to get correct alignments.
220 MaxHeapSize = ShenandoahHeapRegion::setup_sizes(MaxHeapSize);
221
222 // This is expected by our algorithm for ShenandoahHeap::heap_region_containing().
223 size_t align = ShenandoahHeapRegion::region_size_bytes();
224 if (UseLargePages) {
225 align = MAX2(align, os::large_page_size());
|
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "gc/shared/gcArguments.hpp"
28 #include "gc/shared/tlab_globals.hpp"
29 #include "gc/shared/workerPolicy.hpp"
30 #include "gc/shenandoah/shenandoahArguments.hpp"
31 #include "gc/shenandoah/shenandoahCardTable.hpp"
32 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
33 #include "gc/shenandoah/shenandoahGenerationalHeap.hpp"
34 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
35 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
36 #include "runtime/globals_extension.hpp"
37 #include "runtime/java.hpp"
38 #include "utilities/defaultStream.hpp"
39 #include "utilities/powerOfTwo.hpp"
40
41 void ShenandoahArguments::initialize() {
42 #if !(defined AARCH64 || defined AMD64 || defined PPC64 || defined RISCV64)
43 vm_exit_during_initialization("Shenandoah GC is not supported on this platform.");
44 #endif
45
46 #if 0 // leave this block as stepping stone for future platforms
183 // historical data, assigning more recent data the weight according to TLABAllocationWeight.
184 // Current default is good for generational collectors that run frequent young GCs.
185 // With Shenandoah, GC cycles are much less frequent, so we need we need sizing policy
186 // to converge faster over smaller number of resizing decisions.
187 if (strcmp(ShenandoahGCMode, "generational") && FLAG_IS_DEFAULT(TLABAllocationWeight)) {
188 FLAG_SET_DEFAULT(TLABAllocationWeight, 90);
189 }
190 // In generational mode, let TLABAllocationWeight keeps its default value of 35.
191
192 if (GCCardSizeInBytes < ShenandoahMinCardSizeInBytes) {
193 vm_exit_during_initialization(
194 err_msg("GCCardSizeInBytes ( %u ) must be >= %u\n", GCCardSizeInBytes, (unsigned int) ShenandoahMinCardSizeInBytes));
195 }
196
197 // Gen shen does not support any ShenandoahGCHeuristics value except for the default "adaptive"
198 if ((strcmp(ShenandoahGCMode, "generational") == 0)
199 && strcmp(ShenandoahGCHeuristics, "adaptive") != 0) {
200 log_warning(gc)("Ignoring -XX:ShenandoahGCHeuristics input: %s, because generational shenandoah only"
201 " supports adaptive heuristics", ShenandoahGCHeuristics);
202 }
203 }
204
205 size_t ShenandoahArguments::conservative_max_heap_alignment() {
206 size_t align = next_power_of_2(ShenandoahMaxRegionSize);
207 if (UseLargePages) {
208 align = MAX2(align, os::large_page_size());
209 }
210 return align;
211 }
212
213 void ShenandoahArguments::initialize_alignments() {
214 CardTable::initialize_card_size();
215
216 // Need to setup sizes early to get correct alignments.
217 MaxHeapSize = ShenandoahHeapRegion::setup_sizes(MaxHeapSize);
218
219 // This is expected by our algorithm for ShenandoahHeap::heap_region_containing().
220 size_t align = ShenandoahHeapRegion::region_size_bytes();
221 if (UseLargePages) {
222 align = MAX2(align, os::large_page_size());
|