src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp
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*** old/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Thu Oct 31 16:44:05 2013
--- new/src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp Thu Oct 31 16:44:05 2013
*** 29,99 ****
--- 29,47 ----
// There is a nice batch of tested generation sizing code in
// TwoGenerationCollectorPolicy. Lets reuse it!
class GenerationSizer : public TwoGenerationCollectorPolicy {
! 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);
}
}
void initialize_alignments() {
_space_alignment = _gen_alignment = default_gen_alignment();
_heap_alignment = compute_heap_alignment();
}
! void trace_gen_sizes(const char* const str);
// The alignment used for boundary between young gen and old gen
! static size_t default_gen_alignment() { return 64 * K * HeapWordSize; }
return 64 * K * HeapWordSize;
}
void initialize_flags() {
// Do basic sizing work
TwoGenerationCollectorPolicy::initialize_flags();
assert(UseSerialGC ||
!FLAG_IS_DEFAULT(ParallelGCThreads) ||
(ParallelGCThreads > 0),
"ParallelGCThreads should be set before flag initialization");
// The survivor ratio's are calculated "raw", unlike the
// default gc, which adds 2 to the ratio value. We need to
// make sure the values are valid before using them.
if (MinSurvivorRatio < 3) {
FLAG_SET_ERGO(uintx, MinSurvivorRatio, 3);
}
if (InitialSurvivorRatio < 3) {
FLAG_SET_ERGO(uintx, InitialSurvivorRatio, 3);
}
}
void 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");
size_t new_alignment = round_to(page_sz, _gen_alignment);
if (new_alignment != _gen_alignment) {
_gen_alignment = new_alignment;
// Redo everything from the start
initialize_flags();
}
TwoGenerationCollectorPolicy::initialize_size_info();
trace_gen_sizes("ps heap rnd");
}
};
+ protected:
+ void initialize_alignments();
+ void initialize_flags();
+ void initialize_size_info();
+ };
#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP
src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp
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