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6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO

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Default values set by cms ergonomics are set with FLAG_SET_DEFAULT so down stream the values look like the default values and affect how later parameters are set.  Set these values with FLAG_SET_ERGO instead and adjust how later parameters are interpreted.

Reviewed-by: iveresov, apetrusenko, pbk, ysr
This commit is contained in:
Jon Masamitsu 2008-03-02 16:10:12 -08:00
parent a6d8fca876
commit 6c0c606249
10 changed files with 376 additions and 97 deletions
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31
hotspot/src/share/vm/memory/collectorPolicy.hpp
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@ -82,8 +82,11 @@ class CollectorPolicy : public CHeapObj {
size_t max_alignment() { return _max_alignment; }
size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
void set_initial_heap_byte_size(size_t v) { _initial_heap_byte_size = v; }
size_t max_heap_byte_size() { return _max_heap_byte_size; }
void set_max_heap_byte_size(size_t v) { _max_heap_byte_size = v; }
size_t min_heap_byte_size() { return _min_heap_byte_size; }
void set_min_heap_byte_size(size_t v) { _min_heap_byte_size = v; }
enum Name {
CollectorPolicyKind,
@ -182,8 +185,24 @@ class GenCollectorPolicy : public CollectorPolicy {
// compute max heap alignment
size_t compute_max_alignment();
// Scale the base_size by NewRation according to
// result = base_size / (NewRatio + 1)
// and align by min_alignment()
size_t scale_by_NewRatio_aligned(size_t base_size);
// Bound the value by the given maximum minus the
// min_alignment.
size_t bound_minus_alignment(size_t desired_size, size_t maximum_size);
public:
// Accessors
size_t min_gen0_size() { return _min_gen0_size; }
void set_min_gen0_size(size_t v) { _min_gen0_size = v; }
size_t initial_gen0_size() { return _initial_gen0_size; }
void set_initial_gen0_size(size_t v) { _initial_gen0_size = v; }
size_t max_gen0_size() { return _max_gen0_size; }
void set_max_gen0_size(size_t v) { _max_gen0_size = v; }
virtual int number_of_generations() = 0;
virtual GenerationSpec **generations() {
@ -236,6 +255,14 @@ class TwoGenerationCollectorPolicy : public GenCollectorPolicy {
void initialize_generations() { ShouldNotReachHere(); }
public:
// Accessors
size_t min_gen1_size() { return _min_gen1_size; }
void set_min_gen1_size(size_t v) { _min_gen1_size = v; }
size_t initial_gen1_size() { return _initial_gen1_size; }
void set_initial_gen1_size(size_t v) { _initial_gen1_size = v; }
size_t max_gen1_size() { return _max_gen1_size; }
void set_max_gen1_size(size_t v) { _max_gen1_size = v; }
// Inherited methods
TwoGenerationCollectorPolicy* as_two_generation_policy() { return this; }
@ -246,6 +273,10 @@ class TwoGenerationCollectorPolicy : public GenCollectorPolicy {
virtual CollectorPolicy::Name kind() {
return CollectorPolicy::TwoGenerationCollectorPolicyKind;
}
// Returns true is gen0 sizes were adjusted
bool adjust_gen0_sizes(size_t* gen0_size_ptr, size_t* gen1_size_ptr,
size_t heap_size, size_t min_gen1_size);
};
class MarkSweepPolicy : public TwoGenerationCollectorPolicy {