31 _last_period_humongous_bytes(0),
32 _humongous_bytes_after_last_gc(0),
33 _humongous_bytes_after_penultimate_gc(0),
34 _allocated_bytes_since_last_gc(0),
35 _allocated_humongous_bytes_since_last_gc(0) {
36 }
37
38 void G1OldGenAllocationTracker::reset_after_gc(size_t humongous_bytes_after_gc) {
39 // Record last
40 _last_period_old_bytes = _allocated_bytes_since_last_gc;
41 _last_period_humongous_bytes = _allocated_humongous_bytes_since_last_gc;
42 _humongous_bytes_after_penultimate_gc = _humongous_bytes_after_last_gc;
43 _humongous_bytes_after_last_gc = humongous_bytes_after_gc;
44 // Reset
45 _allocated_bytes_since_last_gc = 0;
46 _allocated_humongous_bytes_since_last_gc = 0;
47 log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, "
48 "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B.",
49 _last_period_old_bytes, _last_period_humongous_bytes);
50 }
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31 _last_period_humongous_bytes(0),
32 _humongous_bytes_after_last_gc(0),
33 _humongous_bytes_after_penultimate_gc(0),
34 _allocated_bytes_since_last_gc(0),
35 _allocated_humongous_bytes_since_last_gc(0) {
36 }
37
38 void G1OldGenAllocationTracker::reset_after_gc(size_t humongous_bytes_after_gc) {
39 // Record last
40 _last_period_old_bytes = _allocated_bytes_since_last_gc;
41 _last_period_humongous_bytes = _allocated_humongous_bytes_since_last_gc;
42 _humongous_bytes_after_penultimate_gc = _humongous_bytes_after_last_gc;
43 _humongous_bytes_after_last_gc = humongous_bytes_after_gc;
44 // Reset
45 _allocated_bytes_since_last_gc = 0;
46 _allocated_humongous_bytes_since_last_gc = 0;
47 log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, "
48 "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B.",
49 _last_period_old_bytes, _last_period_humongous_bytes);
50 }
51
52 size_t G1OldGenAllocationTracker::last_period_net_survived_old_bytes() const {
53 // The upper limit of the freed region count is the number of regions allocated
54 // since the last gc. When more humongous regions survived the current gc than
55 // survived the previous one, deduct the increment.
56 size_t freed_humongous_bytes = _last_period_humongous_bytes;
57
58 if (freed_humongous_bytes > 0 && _humongous_bytes_after_penultimate_gc < _humongous_bytes_after_last_gc) {
59 freed_humongous_bytes -= _humongous_bytes_after_last_gc - _humongous_bytes_after_penultimate_gc;
60 }
61 assert(_last_period_old_bytes >= freed_humongous_bytes, "Allocation rate cannot be negative");
62 return _last_period_old_bytes - freed_humongous_bytes;
63 }
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