Mercurial > hg > truffle
diff src/share/vm/runtime/arguments.cpp @ 6736:11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
Summary: Don't allocate huge class metaspace size by default on x64
Reviewed-by: stefank, jmasa, kvn
| author | coleenp |
|---|---|
| date | Fri, 07 Sep 2012 16:42:25 -0400 |
| parents | da91efe96a93 |
| children | bc675e55b48c 9a86ddfc6c8f |
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--- a/src/share/vm/runtime/arguments.cpp Fri Sep 07 12:04:16 2012 -0400 +++ b/src/share/vm/runtime/arguments.cpp Fri Sep 07 16:42:25 2012 -0400 @@ -1427,6 +1427,16 @@ // if (FLAG_IS_DEFAULT(UseCompressedKlassPointers)) { // FLAG_SET_ERGO(bool, UseCompressedKlassPointers, true); // } + // Set the ClassMetaspaceSize to something that will not need to be + // expanded, since it cannot be expanded. + if (UseCompressedKlassPointers && FLAG_IS_DEFAULT(ClassMetaspaceSize)) { + // 100,000 classes seems like a good size, so 100M assumes around 1K + // per klass. The vtable and oopMap is embedded so we don't have a fixed + // size per klass. Eventually, this will be parameterized because it + // would also be useful to determine the optimal size of the + // systemDictionary. + FLAG_SET_ERGO(uintx, ClassMetaspaceSize, 100*M); + } } // Also checks that certain machines are slower with compressed oops // in vm_version initialization code. @@ -1965,6 +1975,9 @@ status = status && verify_object_alignment(); + status = status && verify_min_value(ClassMetaspaceSize, 1*M, + "ClassMetaspaceSize"); + return status; } @@ -2916,7 +2929,7 @@ (UseLargePages && FLAG_IS_CMDLINE(UseLargePages)); if (cannot_share) { if (must_share) { - warning("disabling large pages%s" + warning("disabling large pages %s" "because of %s", "" LP64_ONLY("and compressed oops "), DumpSharedSpaces ? "-Xshare:dump" : "-Xshare:on"); FLAG_SET_CMDLINE(bool, UseLargePages, false);