--- old/src/share/vm/runtime/globals.hpp 2016-01-27 16:52:24.600020528 +0100 +++ new/src/share/vm/runtime/globals.hpp 2016-01-27 16:52:24.372020538 +0100 @@ -2964,16 +2964,16 @@ \ product(intx, AllocatePrefetchLines, 3, \ "Number of lines to prefetch ahead of array allocation pointer") \ - range(1, max_jint / 2) \ + range(1, 64) \ \ product(intx, AllocateInstancePrefetchLines, 1, \ "Number of lines to prefetch ahead of instance allocation " \ "pointer") \ - range(1, max_jint / 2) \ + range(1, 64) \ \ product(intx, AllocatePrefetchStepSize, 16, \ "Step size in bytes of sequential prefetch instructions") \ - range(1, max_jint) \ + range(1, 512) \ constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ \ product(intx, AllocatePrefetchInstr, 0, \