src/share/vm/gc_implementation/g1/heapRegion.cpp
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hs-gc-g1-mmap Cdiff src/share/vm/gc_implementation/g1/heapRegion.cpp
src/share/vm/gc_implementation/g1/heapRegion.cpp
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*** 147,168 ****
// The automatic region size calculation will try to have around this
// many regions in the heap (based on the min heap size).
#define TARGET_REGION_NUMBER 2048
! void HeapRegion::setup_heap_region_size(uintx min_heap_size) {
! // region_size in bytes
uintx region_size = G1HeapRegionSize;
if (FLAG_IS_DEFAULT(G1HeapRegionSize)) {
! // We base the automatic calculation on the min heap size. This
! // can be problematic if the spread between min and max is quite
! // wide, imagine -Xms128m -Xmx32g. But, if we decided it based on
! // the max size, the region size might be way too large for the
! // min size. Either way, some users might have to set the region
! // size manually for some -Xms / -Xmx combos.
!
! region_size = MAX2(min_heap_size / TARGET_REGION_NUMBER,
(uintx) MIN_REGION_SIZE);
}
int region_size_log = log2_long((jlong) region_size);
// Recalculate the region size to make sure it's a power of
--- 147,161 ----
// The automatic region size calculation will try to have around this
// many regions in the heap (based on the min heap size).
#define TARGET_REGION_NUMBER 2048
! void HeapRegion::setup_heap_region_size(size_t initial_heap_size, size_t max_heap_size) {
uintx region_size = G1HeapRegionSize;
if (FLAG_IS_DEFAULT(G1HeapRegionSize)) {
! size_t average_heap_size = (initial_heap_size + max_heap_size) / 2;
! region_size = MAX2(average_heap_size / TARGET_REGION_NUMBER,
(uintx) MIN_REGION_SIZE);
}
int region_size_log = log2_long((jlong) region_size);
// Recalculate the region size to make sure it's a power of
src/share/vm/gc_implementation/g1/heapRegion.cpp
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