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comparison src/share/vm/runtime/arguments.cpp @ 7982:10d5f25a7c67

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8000968: NPG: UseCompressedKlassPointers asserts with ObjectAlignmentInBytes for > 32G CompressedOops Summary: Pick a base that works for both CompressedOpps alignment and CompressedKlassPtrs alignment. Reviewed-by: kvn, roland
author hseigel
date Mon, 04 Feb 2013 08:26:02 -0500
parents baf7fac3167e
children 3c9bc17b9403 9425ba04792d
comparison
equal deleted inserted replaced
7981:ce5467120c84 7982:10d5f25a7c67
1444 if (FLAG_IS_DEFAULT(UseCompressedKlassPointers)) { 1444 if (FLAG_IS_DEFAULT(UseCompressedKlassPointers)) {
1445 FLAG_SET_ERGO(bool, UseCompressedKlassPointers, true); 1445 FLAG_SET_ERGO(bool, UseCompressedKlassPointers, true);
1446 } 1446 }
1447 // Set the ClassMetaspaceSize to something that will not need to be 1447 // Set the ClassMetaspaceSize to something that will not need to be
1448 // expanded, since it cannot be expanded. 1448 // expanded, since it cannot be expanded.
1449 if (UseCompressedKlassPointers && FLAG_IS_DEFAULT(ClassMetaspaceSize)) { 1449 if (UseCompressedKlassPointers) {
1450 // 100,000 classes seems like a good size, so 100M assumes around 1K 1450 if (ClassMetaspaceSize > KlassEncodingMetaspaceMax) {
1451 // per klass. The vtable and oopMap is embedded so we don't have a fixed 1451 warning("Class metaspace size is too large for UseCompressedKlassPointers");
1452 // size per klass. Eventually, this will be parameterized because it 1452 FLAG_SET_DEFAULT(UseCompressedKlassPointers, false);
1453 // would also be useful to determine the optimal size of the 1453 } else if (FLAG_IS_DEFAULT(ClassMetaspaceSize)) {
1454 // systemDictionary. 1454 // 100,000 classes seems like a good size, so 100M assumes around 1K
1455 FLAG_SET_ERGO(uintx, ClassMetaspaceSize, 100*M); 1455 // per klass. The vtable and oopMap is embedded so we don't have a fixed
1456 // size per klass. Eventually, this will be parameterized because it
1457 // would also be useful to determine the optimal size of the
1458 // systemDictionary.
1459 FLAG_SET_ERGO(uintx, ClassMetaspaceSize, 100*M);
1460 }
1456 } 1461 }
1457 } 1462 }
1458 // Also checks that certain machines are slower with compressed oops 1463 // Also checks that certain machines are slower with compressed oops
1459 // in vm_version initialization code. 1464 // in vm_version initialization code.
1460 #endif // _LP64 1465 #endif // _LP64