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comparison src/share/vm/gc_implementation/g1/g1MMUTracker.cpp @ 993:54b3b351d6f9

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Merge
author jrose
date Wed, 23 Sep 2009 23:56:15 -0700
parents e1fdf4fd34dc
children 89e0543e1737
comparison
equal deleted inserted replaced
992:6a8ccac44f41 993:54b3b351d6f9
35 35
36 /***** ALL TIMES ARE IN SECS!!!!!!! *****/ 36 /***** ALL TIMES ARE IN SECS!!!!!!! *****/
37 37
38 G1MMUTracker::G1MMUTracker(double time_slice, double max_gc_time) : 38 G1MMUTracker::G1MMUTracker(double time_slice, double max_gc_time) :
39 _time_slice(time_slice), 39 _time_slice(time_slice),
40 _max_gc_time(max_gc_time), 40 _max_gc_time(max_gc_time) { }
41 _conc_overhead_time_sec(0.0) { }
42
43 void
44 G1MMUTracker::update_conc_overhead(double conc_overhead) {
45 double conc_overhead_time_sec = _time_slice * conc_overhead;
46 if (conc_overhead_time_sec > 0.9 * _max_gc_time) {
47 // We are screwed, as we only seem to have <10% of the soft
48 // real-time goal available for pauses. Let's admit defeat and
49 // allow something more generous as a pause target.
50 conc_overhead_time_sec = 0.75 * _max_gc_time;
51 }
52
53 _conc_overhead_time_sec = conc_overhead_time_sec;
54 }
55 41
56 G1MMUTrackerQueue::G1MMUTrackerQueue(double time_slice, double max_gc_time) : 42 G1MMUTrackerQueue::G1MMUTrackerQueue(double time_slice, double max_gc_time) :
57 G1MMUTracker(time_slice, max_gc_time), 43 G1MMUTracker(time_slice, max_gc_time),
58 _head_index(0), 44 _head_index(0),
59 _tail_index(trim_index(_head_index+1)), 45 _tail_index(trim_index(_head_index+1)),
126 double G1MMUTrackerQueue::longest_pause_internal(double current_time) { 112 double G1MMUTrackerQueue::longest_pause_internal(double current_time) {
127 double target_time = _max_gc_time; 113 double target_time = _max_gc_time;
128 114
129 while( 1 ) { 115 while( 1 ) {
130 double gc_time = 116 double gc_time =
131 calculate_gc_time(current_time + target_time) + _conc_overhead_time_sec; 117 calculate_gc_time(current_time + target_time);
132 double diff = target_time + gc_time - _max_gc_time; 118 double diff = target_time + gc_time - _max_gc_time;
133 if (!is_double_leq_0(diff)) { 119 if (!is_double_leq_0(diff)) {
134 target_time -= diff; 120 target_time -= diff;
135 if (is_double_leq_0(target_time)) { 121 if (is_double_leq_0(target_time)) {
136 target_time = -1.0; 122 target_time = -1.0;