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8007036: G1: Too many old regions added to last mixed GC

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Stop adding old regions to collection set when the remaining reclaimable bytes reaches, or goes below, G1HeapWastePercent. Changes were also reviewed by Vitaly Davidovich <vitalyd@gmail.com>.

Reviewed-by: brutisso
This commit is contained in:
John Cuthbertson 2013-03-04 12:42:14 -08:00
parent 37aa83449e
commit a3a42c48e8
4 changed files with 101 additions and 55 deletions
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12
hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp
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@ -619,6 +619,18 @@ private:
bool predict_will_fit(uint young_length, double base_time_ms,
uint base_free_regions, double target_pause_time_ms);
// Calculate the minimum number of old regions we'll add to the CSet
// during a mixed GC.
uint calc_min_old_cset_length();
// Calculate the maximum number of old regions we'll add to the CSet
// during a mixed GC.
uint calc_max_old_cset_length();
// Returns the given amount of uncollected reclaimable space
// as a percentage of the current heap capacity.
double reclaimable_bytes_perc(size_t reclaimable_bytes);
public:
G1CollectorPolicy();