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
25 #include "precompiled.hpp"
26 #include "gc/g1/g1Arguments.hpp"
27 #include "gc/g1/heapRegion.hpp"
28 #include "runtime/globals.hpp"
29 #include "runtime/globals_extension.hpp"
30 #include "runtime/vm_version.hpp"
31
32 size_t G1Arguments::conservative_max_heap_alignment() {
33 return HeapRegion::max_region_size();
34 }
35
36 void G1Arguments::initialize_flags() {
37 GCArguments::initialize_flags();
38 assert(UseG1GC, "Error");
39 #if defined(COMPILER1) || INCLUDE_JVMCI
40 FastTLABRefill = false;
41 #endif
42 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
43 if (ParallelGCThreads == 0) {
44 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
45 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
46 }
47
72 // arrange that the pause interval to be pause time target + 1 to
73 // ensure that a) the pause time target is maximized with respect to
74 // the pause interval and b) we maintain the invariant that pause
75 // time target < pause interval. If the user does not want this
76 // maximum flexibility, they will have to set the pause interval
77 // explicitly.
78
79 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
80 // The default pause time target in G1 is 200ms
81 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
82 }
83
84 // Then, if the interval parameter was not set, set it according to
85 // the pause time target (this will also deal with the case when the
86 // pause time target is the default value).
87 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
88 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
89 }
90
91 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
92 }
|
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
25 #include "precompiled.hpp"
26 #include "gc/g1/g1Arguments.hpp"
27 #include "gc/g1/g1CollectedHeap.inline.hpp"
28 #include "gc/g1/g1CollectorPolicy.hpp"
29 #include "gc/g1/heapRegion.hpp"
30 #include "gc/shared/gcArguments.inline.hpp"
31 #include "runtime/globals.hpp"
32 #include "runtime/globals_extension.hpp"
33 #include "runtime/vm_version.hpp"
34
35 size_t G1Arguments::conservative_max_heap_alignment() {
36 return HeapRegion::max_region_size();
37 }
38
39 void G1Arguments::initialize_flags() {
40 GCArguments::initialize_flags();
41 assert(UseG1GC, "Error");
42 #if defined(COMPILER1) || INCLUDE_JVMCI
43 FastTLABRefill = false;
44 #endif
45 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
46 if (ParallelGCThreads == 0) {
47 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
48 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
49 }
50
75 // arrange that the pause interval to be pause time target + 1 to
76 // ensure that a) the pause time target is maximized with respect to
77 // the pause interval and b) we maintain the invariant that pause
78 // time target < pause interval. If the user does not want this
79 // maximum flexibility, they will have to set the pause interval
80 // explicitly.
81
82 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
83 // The default pause time target in G1 is 200ms
84 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
85 }
86
87 // Then, if the interval parameter was not set, set it according to
88 // the pause time target (this will also deal with the case when the
89 // pause time target is the default value).
90 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
91 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
92 }
93
94 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
95 }
96
97 CollectedHeap* G1Arguments::create_heap() {
98 return create_heap_with_policy<G1CollectedHeap, G1CollectorPolicy>();
99 }
|