src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp
Index
Unified diffs
Context diffs
Sdiffs
Patch
New
Old
Previous File
Next File
*** old/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Thu Sep 19 22:40:47 2013
--- new/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Thu Sep 19 22:40:47 2013
*** 29,43 ****
--- 29,55 ----
// There is a nice batch of tested generation sizing code in
// TwoGenerationCollectorPolicy. Lets reuse it!
class GenerationSizer : public TwoGenerationCollectorPolicy {
! public:
! private:
+
+ void trace_gen_sizes(const char* const str) {
+ if (TracePageSizes) {
+ tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " "
+ SIZE_FORMAT "," SIZE_FORMAT " "
+ SIZE_FORMAT,
+ str,
+ _min_gen1_size / K, _max_gen1_size / K,
+ _min_gen0_size / K, _max_gen0_size / K,
+ _max_heap_byte_size / K);
+ }
+ }
+
+ public:
GenerationSizer() {
// Partial init only!
initialize_flags();
initialize_size_info();
+ initialize_all();
}
void initialize_flags() {
// Do basic sizing work
TwoGenerationCollectorPolicy::initialize_flags();
*** 59,73 ****
--- 71,102 ----
if (InitialSurvivorRatio < 3) {
InitialSurvivorRatio = 3;
}
}
size_t min_young_gen_size() { return _min_gen0_size; }
size_t young_gen_size() { return _initial_gen0_size; }
size_t max_young_gen_size() { return _max_gen0_size; }
size_t min_old_gen_size() { return _min_gen1_size; }
size_t old_gen_size() { return _initial_gen1_size; }
size_t max_old_gen_size() { return _max_gen1_size; }
+ void initialize_size_info() {
+ TwoGenerationCollectorPolicy::initialize_size_info();
+
+ trace_gen_sizes("ps heap raw");
+ const size_t page_sz = os::page_size_for_region(_min_heap_byte_size,
+ _max_heap_byte_size,
+ 8);
+
+ // Can a page size be something else than a power of two?
+ assert(is_power_of_2((intptr_t)page_sz), "must be a power of 2");
+ _min_alignment = round_to(page_sz, intra_heap_alignment());
+
+ // Update sizes to reflect the selected page size.
+ _min_gen0_size = align_size_up(_min_gen0_size, _min_alignment);
+ _initial_gen0_size = MAX2(align_size_up_(_initial_gen0_size, _min_alignment), _min_gen0_size);
+ _max_gen0_size = align_size_up(_max_gen0_size, _min_alignment);
+
+ // Align old gen size down to preserve specified heap size. Adjust all other values.
+ _max_gen1_size = max_heap_byte_size() - _max_gen0_size;
+ _min_gen1_size = MIN2(align_size_up_(_min_gen1_size, _min_alignment), _max_gen1_size);
+ _initial_gen1_size = MIN2(align_size_up_(_initial_gen1_size, _min_alignment), _max_gen1_size);
+
+ trace_gen_sizes("ps heap rnd");
+ }
};
#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp
Index
Unified diffs
Context diffs
Sdiffs
Patch
New
Old
Previous File
Next File