< prev index next >
src/hotspot/share/gc/g1/g1RegionToSpaceMapper.cpp
Print this page
rev 51649 : version 1
rev 51652 : Added support for eager mixed collection of evacuation failure regions
rev 51878 : Minor changes
rev 52017 : All changes for G1 GC moved from 'combined' repo folder
*** 168,184 ****
if (_listener != NULL) {
_listener->on_commit(start_idx, num_regions, zero_filled);
}
}
! G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_mapper(ReservedSpace rs,
size_t actual_size,
size_t page_size,
size_t region_granularity,
size_t commit_factor,
MemoryType type) {
if (region_granularity >= (page_size * commit_factor)) {
return new G1RegionsLargerThanCommitSizeMapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
} else {
return new G1RegionsSmallerThanCommitSizeMapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
}
--- 168,314 ----
if (_listener != NULL) {
_listener->on_commit(start_idx, num_regions, zero_filled);
}
}
! void G1RegionToHeteroSpaceMapper::map_nvdimm_space(ReservedSpace rs) {
! assert(AllocateOldGenAt != NULL, "");
! int _backing_fd = os::create_file_for_heap(AllocateOldGenAt);
! if (_backing_fd == -1) {
! vm_exit_during_initialization(
! err_msg("Could not create file for Old generation at location %s", AllocateOldGenAt));
! }
! // commit this memory in nv-dimm
! char* ret = os::attempt_reserve_memory_at(rs.size(), rs.base(), _backing_fd);
! //char* ret = os::replace_existing_mapping_with_file_mapping(rs.base(), rs.size(), _backing_fd);
! if (ret != rs.base()) {
! if (ret != NULL) {
! os::unmap_memory(rs.base(), rs.size());
! }
! vm_exit_during_initialization(
! err_msg("Error in mapping Old Gen to given AllocateOldGenAt = %s", AllocateOldGenAt));
! }
! }
!
! G1RegionToHeteroSpaceMapper::G1RegionToHeteroSpaceMapper(ReservedSpace rs,
! size_t actual_size,
! size_t page_size,
! size_t alloc_granularity,
! size_t commit_factor,
! MemoryType type) :
! G1RegionToSpaceMapper(rs, actual_size, page_size, alloc_granularity, commit_factor, type),
! _num_committed_dram(0), _num_committed_nvdimm(0) {
! assert(actual_size == 2 * MaxHeapSize, "For 2-way heterogenuous heap, reserved space is two times MaxHeapSize");
!
! // Since we need to split the reserved space in half and map second half to file in NV-DIMM, we need to release the reserved memory first
! // Because on some OSes (e.g. Windows) you cannot do a file mapping on memory reserved with regular mapping.
! os::release_memory(rs.base(), rs.size());
!
! /* Toggle HeteroHeap
! // We map first part of size Xmx to DRAM.
! ReservedSpace rs_dram = rs.first_part(MaxHeapSize);
! // Second half of reserved memory is mapped to NV-DIMM.
! ReservedSpace rs_nvdimm = rs.last_part(MaxHeapSize);*/
! // We map first part of size Xmx to NVDIMM.
! ReservedSpace rs_nvdimm = rs.first_part(MaxHeapSize);
! // Second half of reserved memory is mapped to DRAM.
! ReservedSpace rs_dram = rs.last_part(MaxHeapSize);
! assert(rs_dram.size() == rs_nvdimm.size() && rs_nvdimm.size() == MaxHeapSize, "They all should be same");
!
! // Reserve dram memory
! char* base = os::attempt_reserve_memory_at(rs_dram.size(), rs_dram.base());
! if (base != rs_dram.base()) {
! if (base != NULL) {
! os::release_memory(base, rs_dram.size());
! }
! vm_exit_during_initialization(err_msg("Error in allocating heap"));
! }
!
! // We reserve and commit this entire space to NV-DIMM.
! map_nvdimm_space(rs_nvdimm);
!
! if (alloc_granularity >= (page_size * commit_factor)) {
! _dram_mapper = new G1RegionsLargerThanCommitSizeMapper(rs_dram, rs_dram.size(), page_size, alloc_granularity, commit_factor, type);
! }
! else {
! _dram_mapper = new G1RegionsSmallerThanCommitSizeMapper(rs_dram, rs_dram.size(), page_size, alloc_granularity, commit_factor, type);
! }
!
! /* Toggle HeteroHeap
! _start_index_of_nvdimm = (uint)(rs_dram.size() / alloc_granularity);
! _start_index_of_dram = 0; */
! _start_index_of_nvdimm = 0;
! _start_index_of_dram = (uint)(rs_nvdimm.size() / alloc_granularity);
! }
!
! void G1RegionToHeteroSpaceMapper::commit_regions(uint start_idx, size_t num_regions, WorkGang* pretouch_gang) {
! uint end_idx = (start_idx + (uint)num_regions - 1);
!
! /* Toggle HeteroHeap
! uint num_nvdimm = end_idx >= _start_index_of_nvdimm ? MIN2((end_idx - _start_index_of_nvdimm + 1), (uint)num_regions) : 0;
! uint num_dram = (uint)num_regions - num_nvdimm;*/
! uint num_dram = end_idx >= _start_index_of_dram ? MIN2((end_idx - _start_index_of_dram + 1), (uint)num_regions) : 0;
! uint num_nvdimm = (uint)num_regions - num_dram;
!
! if (num_nvdimm > 0) {
! // We do not need to commit nv-dimm regions, since they are committed in the beginning.
! _num_committed_nvdimm += num_nvdimm;
! }
! if (num_dram > 0) {
! /* Toggle HeteroHeap
! _dram_mapper->commit_regions(start_idx, num_dram, pretouch_gang); */
! _dram_mapper->commit_regions(start_idx > _start_index_of_dram ? (start_idx - _start_index_of_dram) : 0, num_dram, pretouch_gang);
! _num_committed_dram += num_dram;
! }
! }
!
! void G1RegionToHeteroSpaceMapper::uncommit_regions(uint start_idx, size_t num_regions) {
! uint end_idx = (start_idx + (uint)num_regions - 1);
! /* Toggle HeterHeap
! uint num_nvdimm = end_idx >= _start_index_of_nvdimm ? MIN2((end_idx - _start_index_of_nvdimm + 1), (uint)num_regions) : 0;
! uint num_dram = (uint)num_regions - num_nvdimm;*/
! uint num_dram = end_idx >= _start_index_of_dram ? MIN2((end_idx - _start_index_of_dram + 1), (uint)num_regions) : 0;
! uint num_nvdimm = (uint)num_regions - num_dram;
!
! if (num_nvdimm > 0) {
! // We do not uncommit memory for nv-dimm regions.
! _num_committed_nvdimm -= num_nvdimm;
! }
!
! if (num_dram > 0) {
! _dram_mapper->uncommit_regions(start_idx > _start_index_of_dram ? (start_idx - _start_index_of_dram) : 0, num_dram);
! _num_committed_dram -= num_dram;
! }
! }
!
! uint G1RegionToHeteroSpaceMapper::num_committed_dram() {
! return _num_committed_dram;
! }
!
! uint G1RegionToHeteroSpaceMapper::num_committed_nvdimm() {
! return _num_committed_nvdimm;
! }
!
! G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_heap_mapper(ReservedSpace rs,
size_t actual_size,
size_t page_size,
size_t region_granularity,
size_t commit_factor,
MemoryType type) {
+ if (AllocateOldGenAt != NULL) {
+ return new G1RegionToHeteroSpaceMapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
+ } else {
+ return create_mapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
+ }
+ }
+ G1RegionToSpaceMapper* G1RegionToSpaceMapper::create_mapper(ReservedSpace rs,
+ size_t actual_size,
+ size_t page_size,
+ size_t region_granularity,
+ size_t commit_factor,
+ MemoryType type) {
if (region_granularity >= (page_size * commit_factor)) {
return new G1RegionsLargerThanCommitSizeMapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
} else {
return new G1RegionsSmallerThanCommitSizeMapper(rs, actual_size, page_size, region_granularity, commit_factor, type);
}
< prev index next >