22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/shared/gcArguments.hpp"
27 #include "gc/serial/serialArguments.hpp"
28 #include "runtime/globals.hpp"
29 #include "runtime/globals_extension.hpp"
30 #include "runtime/java.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/macros.hpp"
33
34 #if INCLUDE_ALL_GCS
35 #include "gc/parallel/parallelArguments.hpp"
36 #include "gc/cms/cmsArguments.hpp"
37 #include "gc/g1/g1Arguments.hpp"
38 #endif
39
40 GCArguments* GCArguments::_instance = NULL;
41
42 GCArguments* GCArguments::instance() {
43 assert(is_initialized(), "Heap factory not yet created");
44 return _instance;
45 }
46
47 bool GCArguments::is_initialized() {
48 return _instance != NULL;
49 }
50
51 bool GCArguments::gc_selected() {
52 #if INCLUDE_ALL_GCS
53 return UseSerialGC || UseParallelGC || UseParallelOldGC || UseConcMarkSweepGC || UseG1GC;
54 #else
55 return UseSerialGC;
56 #endif // INCLUDE_ALL_GCS
57 }
58
59 void GCArguments::select_gc() {
60 if (!gc_selected()) {
61 select_gc_ergonomically();
62 if (!gc_selected()) {
86 if (AssumeMP && !UseSerialGC) {
87 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
88 warning("If the number of processors is expected to increase from one, then"
89 " you should configure the number of parallel GC threads appropriately"
90 " using -XX:ParallelGCThreads=N");
91 }
92 }
93 if (MinHeapFreeRatio == 100) {
94 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
95 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
96 }
97
98 // If class unloading is disabled, also disable concurrent class unloading.
99 if (!ClassUnloading) {
100 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
101 FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
102 }
103 #endif // INCLUDE_ALL_GCS
104 }
105
106 jint GCArguments::create_instance() {
107 assert(!is_initialized(), "GC arguments already initialized");
108
109 select_gc();
110
111 #if !INCLUDE_ALL_GCS
112 if (UseParallelGC || UseParallelOldGC) {
113 jio_fprintf(defaultStream::error_stream(), "UseParallelGC not supported in this VM.\n");
114 return JNI_ERR;
115 } else if (UseG1GC) {
116 jio_fprintf(defaultStream::error_stream(), "UseG1GC not supported in this VM.\n");
117 return JNI_ERR;
118 } else if (UseConcMarkSweepGC) {
119 jio_fprintf(defaultStream::error_stream(), "UseConcMarkSweepGC not supported in this VM.\n");
120 return JNI_ERR;
121 #else
122 if (UseParallelGC || UseParallelOldGC) {
123 _instance = new ParallelArguments();
124 } else if (UseG1GC) {
125 _instance = new G1Arguments();
126 } else if (UseConcMarkSweepGC) {
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22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/shared/gcArguments.hpp"
27 #include "gc/serial/serialArguments.hpp"
28 #include "runtime/globals.hpp"
29 #include "runtime/globals_extension.hpp"
30 #include "runtime/java.hpp"
31 #include "runtime/os.hpp"
32 #include "utilities/macros.hpp"
33
34 #if INCLUDE_ALL_GCS
35 #include "gc/parallel/parallelArguments.hpp"
36 #include "gc/cms/cmsArguments.hpp"
37 #include "gc/g1/g1Arguments.hpp"
38 #endif
39
40 GCArguments* GCArguments::_instance = NULL;
41
42 GCArguments* GCArguments::arguments() {
43 assert(is_initialized(), "Heap factory not yet created");
44 return _instance;
45 }
46
47 bool GCArguments::is_initialized() {
48 return _instance != NULL;
49 }
50
51 bool GCArguments::gc_selected() {
52 #if INCLUDE_ALL_GCS
53 return UseSerialGC || UseParallelGC || UseParallelOldGC || UseConcMarkSweepGC || UseG1GC;
54 #else
55 return UseSerialGC;
56 #endif // INCLUDE_ALL_GCS
57 }
58
59 void GCArguments::select_gc() {
60 if (!gc_selected()) {
61 select_gc_ergonomically();
62 if (!gc_selected()) {
86 if (AssumeMP && !UseSerialGC) {
87 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
88 warning("If the number of processors is expected to increase from one, then"
89 " you should configure the number of parallel GC threads appropriately"
90 " using -XX:ParallelGCThreads=N");
91 }
92 }
93 if (MinHeapFreeRatio == 100) {
94 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
95 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
96 }
97
98 // If class unloading is disabled, also disable concurrent class unloading.
99 if (!ClassUnloading) {
100 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
101 FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
102 }
103 #endif // INCLUDE_ALL_GCS
104 }
105
106 jint GCArguments::initialize() {
107 assert(!is_initialized(), "GC arguments already initialized");
108
109 select_gc();
110
111 #if !INCLUDE_ALL_GCS
112 if (UseParallelGC || UseParallelOldGC) {
113 jio_fprintf(defaultStream::error_stream(), "UseParallelGC not supported in this VM.\n");
114 return JNI_ERR;
115 } else if (UseG1GC) {
116 jio_fprintf(defaultStream::error_stream(), "UseG1GC not supported in this VM.\n");
117 return JNI_ERR;
118 } else if (UseConcMarkSweepGC) {
119 jio_fprintf(defaultStream::error_stream(), "UseConcMarkSweepGC not supported in this VM.\n");
120 return JNI_ERR;
121 #else
122 if (UseParallelGC || UseParallelOldGC) {
123 _instance = new ParallelArguments();
124 } else if (UseG1GC) {
125 _instance = new G1Arguments();
126 } else if (UseConcMarkSweepGC) {
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