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7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size

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Don't allocate huge class metaspace size by default on x64

Reviewed-by: stefank, jmasa, kvn
This commit is contained in:
Coleen Phillimore 2012-09-07 16:42:25 -04:00
parent 12b9a4edbb
commit 6fda647450
4 changed files with 24 additions and 8 deletions
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13
hotspot/src/share/vm/memory/metaspace.cpp
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@ -2779,19 +2779,22 @@ void Metaspace::initialize_class_space(ReservedSpace rs) {
_class_space_list = new VirtualSpaceList(rs);
}
// Class space probably needs a lot less than data space
const int class_space_divisor = 4;
void Metaspace::initialize(Mutex* lock, size_t initial_size) {
// Use SmallChunk size if not specified, adjust class to smaller size if so.
// Use SmallChunk size if not specified. If specified, use this size for
// the data metaspace.
size_t word_size;
size_t class_word_size;
if (initial_size == 0) {
word_size = (size_t) SpaceManager::SmallChunk;
class_word_size = word_size;
class_word_size = (size_t) SpaceManager::SmallChunk;
} else {
word_size = initial_size;
class_word_size = initial_size/class_space_divisor;
// Make the first class chunk bigger than a medium chunk so it's not put
// on the medium chunk list. The next chunk will be small and progress
// from there. This size calculated by -version.
class_word_size = MIN2((size_t)SpaceManager::MediumChunk*5,
(ClassMetaspaceSize/BytesPerWord)*2);
}
assert(space_list() != NULL,