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src/hotspot/share/memory/virtualspace.cpp
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@@ -35,14 +35,14 @@
// ReservedSpace
// Dummy constructor
ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0),
_nvdimm_base_nv(NULL), _nvdimm_size(0), _dram_size(0),
- _alignment(0), _special(false), _executable(false), _fd_for_heap(-1), _fd_for_nvdimm(-1) {
+ _alignment(0), _special(false), _executable(false), _fd_for_heap(-1) {
}
-ReservedSpace::ReservedSpace(size_t size, size_t preferred_page_size) : _fd_for_heap(-1), _fd_for_nvdimm(-1),
+ReservedSpace::ReservedSpace(size_t size, size_t preferred_page_size) : _fd_for_heap(-1),
_nvdimm_base_nv(NULL), _nvdimm_size(0), _dram_size(0) {
bool has_preferred_page_size = preferred_page_size != 0;
// Want to use large pages where possible and pad with small pages.
size_t page_size = has_preferred_page_size ? preferred_page_size : os::page_size_for_region_unaligned(size, 1);
bool large_pages = page_size != (size_t)os::vm_page_size();
@@ -60,18 +60,18 @@
initialize(size, alignment, large_pages, NULL, false);
}
ReservedSpace::ReservedSpace(size_t size, size_t alignment,
bool large,
- char* requested_address) : _fd_for_heap(-1), _fd_for_nvdimm(-1),
+ char* requested_address) : _fd_for_heap(-1),
_nvdimm_base_nv(NULL), _nvdimm_size(0), _dram_size(0) {
initialize(size, alignment, large, requested_address, false);
}
ReservedSpace::ReservedSpace(size_t size, size_t alignment,
bool large,
- bool executable) : _fd_for_heap(-1), _fd_for_nvdimm(-1),
+ bool executable) : _fd_for_heap(-1),
_nvdimm_base_nv(NULL), _nvdimm_size(0), _dram_size(0) {
initialize(size, alignment, large, NULL, executable);
}
// Helper method
@@ -170,47 +170,51 @@
!FLAG_IS_DEFAULT(LargePageSizeInBytes))) {
log_debug(gc, heap, coops)("Reserve regular memory without large pages");
}
}
}
-
+ int fd = -1;
+ if (AllocateOldGenAt == NULL && _fd_for_heap != -1) {
+ // AllocateHeapAt is in use.
+ fd = _fd_for_heap;
+ }
if (base == NULL) {
// Optimistically assume that the OSes returns an aligned base pointer.
// When reserving a large address range, most OSes seem to align to at
// least 64K.
// If the memory was requested at a particular address, use
// os::attempt_reserve_memory_at() to avoid over mapping something
// important. If available space is not detected, return NULL.
if (requested_address != 0) {
- base = os::attempt_reserve_memory_at(size, requested_address, _fd_for_heap);
- if (failed_to_reserve_as_requested(base, requested_address, size, false, _fd_for_heap != -1)) {
+ base = os::attempt_reserve_memory_at(size, requested_address, fd);
+ if (failed_to_reserve_as_requested(base, requested_address, size, false, fd != -1)) {
// OS ignored requested address. Try different address.
base = NULL;
}
} else {
- if (_nvdimm_base_nv != NULL && _fd_for_nvdimm != -1) {
- base = os::reserve_memory(_dram_size, _nvdimm_base_nv, alignment, _fd_for_heap);
+ if (_nvdimm_base_nv != NULL && _fd_for_heap != -1) {
+ base = os::reserve_memory(_dram_size, _nvdimm_base_nv, alignment, fd);
} else {
- base = os::reserve_memory(size, NULL, alignment, _fd_for_heap);
+ base = os::reserve_memory(size, NULL, alignment, fd);
}
}
if (base == NULL) return;
// Check alignment constraints
if ((((size_t)base) & (alignment - 1)) != 0) {
// Base not aligned, retry
- unmap_or_release_memory(base, size, _fd_for_heap != -1 /*is_file_mapped*/);
+ unmap_or_release_memory(base, size, fd != -1 /*is_file_mapped*/);
// Make sure that size is aligned
size = align_up(size, alignment);
- base = os::reserve_memory_aligned(size, alignment, _fd_for_heap);
+ base = os::reserve_memory_aligned(size, alignment, fd);
if (requested_address != 0 &&
- failed_to_reserve_as_requested(base, requested_address, size, false, _fd_for_heap != -1)) {
+ failed_to_reserve_as_requested(base, requested_address, size, false, fd != -1)) {
// As a result of the alignment constraints, the allocated base differs
// from the requested address. Return back to the caller who can
// take remedial action (like try again without a requested address).
assert(_base == NULL, "should be");
return;
@@ -223,11 +227,11 @@
_nvdimm_base_nv = NULL;
_dram_size = (size_t)size;
_size = size;
_alignment = alignment;
// If heap is reserved with a backing file, the entire space has been committed. So set the _special flag to true
- if (_fd_for_heap != -1) {
+ if (fd != -1) {
_special = true;
}
}
@@ -290,12 +294,12 @@
void ReservedSpace::release() {
if (is_reserved()) {
char *real_base = _base - _noaccess_prefix;
const size_t real_size = _size + _noaccess_prefix;
// unmap nvdimm
- if (_fd_for_nvdimm != -1) {
- os::unmap_memory(real_base+real_size, _nvdimm_size);
+ if (_nvdimm_base != NULL) {
+ os::unmap_memory(_nvdimm_base, _nvdimm_size);
}
if (special()) {
if (_fd_for_heap != -1) {
os::unmap_memory(real_base, real_size);
} else {
@@ -361,16 +365,17 @@
if (_base != NULL) {
// We tried before, but we didn't like the address delivered.
release();
}
- if (_fd_for_nvdimm != -1 && UseG1GC) {
+ if (_fd_for_heap != -1 && UseG1GC && AllocateOldGenAt != NULL) {
char* base_nv = os::reserve_memory(size, requested_address, alignment);
initialize_g1gc_nvdimm_dram_sizes(size, alignment);
_nvdimm_base_nv = base_nv+_nvdimm_size; // hint for allocation address of DRAM COMPRESSED HEAP.
}
+
// If OS doesn't support demand paging for large page memory, we need
// to use reserve_memory_special() to reserve and pin the entire region.
// If there is a backing file directory for this space then whether
// large pages are allocated is up to the filesystem of the backing file.
// So we ignore the UseLargePages flag in this case.
@@ -417,19 +422,19 @@
// If the memory was requested at a particular address, use
// os::attempt_reserve_memory_at() to avoid over mapping something
// important. If available space is not detected, return NULL.
if (requested_address != 0) {
- if (_nvdimm_base_nv != NULL && _fd_for_nvdimm != -1) {
+ if (_nvdimm_base_nv != NULL && _fd_for_heap != -1 && AllocateOldGenAt != NULL) {
// first unmap so that OS does not keep trying.
os::unmap_memory(_nvdimm_base_nv, _dram_size);
base = os::attempt_reserve_memory_at(_dram_size, _nvdimm_base_nv);
} else {
base = os::attempt_reserve_memory_at(size, requested_address, _fd_for_heap);
}
} else {
- if (_nvdimm_base_nv != NULL && _fd_for_nvdimm != -1) {
+ if (_nvdimm_base_nv != NULL && _fd_for_heap != -1 && AllocateOldGenAt != NULL) {
// first unmap so that OS does not keep trying.
os::unmap_memory(_nvdimm_base_nv, _dram_size);
base = os::reserve_memory(_dram_size, _nvdimm_base_nv, alignment);
} else {
base = os::reserve_memory(size, NULL, alignment, _fd_for_heap);
@@ -439,19 +444,19 @@
if (base == NULL) { return; }
// Done
_base = base;
_nvdimm_base = _base-_nvdimm_size;
- if (_nvdimm_base_nv != NULL && _fd_for_nvdimm != -1) {
+ if (_nvdimm_base_nv != NULL && _fd_for_heap != -1 && AllocateOldGenAt != NULL) {
_size = _dram_size;
} else {
_size = size;
}
_alignment = alignment;
// If heap is reserved with a backing file, the entire space has been committed. So set the _special flag to true
- if (_fd_for_heap != -1) {
+ if (_fd_for_heap != -1 && AllocateOldGenAt == NULL) {
_special = true;
}
// Check alignment constraints
if ((((size_t)base) & (alignment - 1)) != 0) {
@@ -664,24 +669,24 @@
return;
}
// if AllocateOldGen is used
if (AllocateOldGenAt != NULL) {
- _fd_for_nvdimm = os::create_file_for_heap(AllocateOldGenAt);
- if (_fd_for_nvdimm == -1) {
+ _fd_for_heap = os::create_file_for_heap(AllocateOldGenAt);
+ if (_fd_for_heap== -1) {
vm_exit_during_initialization(
err_msg("Could not create file for Heap at location %s", AllocateOldGenAt));
}
if (UseParallelOldGC) {
// For ParallelOldGC, adaptive sizing picks _old_gen virtual space sizes as needed.
// allocate Xmx on NVDIMM as adaptive sizing may put lot of pressure on NVDIMM.
- os::allocate_file(_fd_for_nvdimm, MaxHeapSize);
- os::set_nvdimm_fd(_fd_for_nvdimm);
+ os::allocate_file(_fd_for_heap, MaxHeapSize);
+ os::set_nvdimm_fd(_fd_for_heap);
os::set_nvdimm_present(true);
}
} else {
- _fd_for_nvdimm = -1;
+ _fd_for_heap = -1;
}
if (heap_allocation_directory != NULL) {
_fd_for_heap = os::create_file_for_heap(heap_allocation_directory);
if (_fd_for_heap == -1) {
@@ -694,11 +699,11 @@
guarantee(is_aligned(size, alignment), "set by caller");
char* base_nv = NULL;
_nvdimm_base_nv = NULL;
- if (_fd_for_nvdimm != -1 && UseG1GC) {
+ if (_fd_for_heap != -1 && UseG1GC && AllocateOldGenAt != NULL) {
if (!UseCompressedOops) {
// if compressed oops use requested address.
initialize_g1gc_nvdimm_dram_sizes(size, alignment);
base_nv = os::reserve_memory(size, NULL, alignment);
_nvdimm_base_nv = base_nv+_nvdimm_size; // hint for allocation address of DRAM heap
@@ -712,11 +717,11 @@
// It can happen we get a zerobased/unscaled heap with noaccess prefix,
// if we had to try at arbitrary address.
establish_noaccess_prefix();
}
} else {
- if (_fd_for_nvdimm != -1 && UseG1GC) {
+ if (_fd_for_heap != -1 && UseG1GC && AllocateOldGenAt != NULL) {
initialize(_dram_size, alignment, large, NULL, false);
} else {
initialize(size, alignment, large, NULL, false);
}
}
@@ -726,22 +731,22 @@
assert(markOopDesc::encode_pointer_as_mark(&_base[size])->decode_pointer() == &_base[size],
"area must be distinguishable from marks for mark-sweep");
if (base() != NULL) {
MemTracker::record_virtual_memory_type((address)base(), mtJavaHeap);
- if (_fd_for_nvdimm != -1 && UseG1GC) {
+ if (_fd_for_heap != -1 && UseG1GC && AllocateOldGenAt != NULL) {
os::set_nvdimm_present(true);
os::set_dram_heapbase((address)_base);
os::set_nvdimm_heapbase((address)_nvdimm_base);
- os::set_nvdimm_fd(_fd_for_nvdimm);
+ os::set_nvdimm_fd(_fd_for_heap);
_size += _nvdimm_size;
_base = _nvdimm_base;
log_info(gc, heap)("Java DRAM Heap at [%p - %p] & NVDIMM Old Gen at [%p - %p] %ld \n", _nvdimm_base+_nvdimm_size, (char*)(_nvdimm_base+_nvdimm_size+_dram_size), _nvdimm_base, (char*)(_nvdimm_base+_nvdimm_size), size);
}
}
- if (_fd_for_heap != -1) {
+ if (_fd_for_heap != -1 && AllocateOldGenAt == NULL) {
os::close(_fd_for_heap);
}
}
// Reserve space for code segment. Same as Java heap only we mark this as
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