8211424: Allocation of old generation of java heap on alternate memory devices - Parallel GC
8202286: Allocation of old generation of Java heap on alternate memory devices
Summary: Enable an experimental feature in HotSpot JVM to allocate old generation of Parallel GC on an alternative memory device, such as NV-DIMMs.
Reviewed-by: sangheki, sjohanss
Contributed-by: kishor.kharbas@intel.com
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#ifndef SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP
#define SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP
#include "gc/parallel/psVirtualspace.hpp"
class PSFileBackedVirtualSpace : public PSVirtualSpace {
private:
const char* _file_path;
int _fd;
bool _mapping_succeeded;
public:
PSFileBackedVirtualSpace(ReservedSpace rs, size_t alignment, const char* file_path);
PSFileBackedVirtualSpace(ReservedSpace rs, const char* file_path);
bool initialize();
bool expand_by(size_t bytes);
bool shrink_by(size_t bytes);
size_t expand_into(PSVirtualSpace* space, size_t bytes);
void release();
};
#endif // SHARE_VM_GC_PARALLEL_PSFILEBACKEDVIRTUALSPACE_HPP