1.1 --- a/src/share/vm/runtime/advancedThresholdPolicy.cpp Fri May 17 09:10:04 2013 -0700
1.2 +++ b/src/share/vm/runtime/advancedThresholdPolicy.cpp Thu May 16 15:46:49 2013 +0200
1.3 @@ -68,7 +68,7 @@
1.4 }
1.5 #endif
1.6
1.7 -
1.8 + set_increase_threshold_at_ratio();
1.9 set_start_time(os::javaTimeMillis());
1.10 }
1.11
1.12 @@ -205,6 +205,17 @@
1.13 double queue_size = CompileBroker::queue_size(level);
1.14 int comp_count = compiler_count(level);
1.15 double k = queue_size / (feedback_k * comp_count) + 1;
1.16 +
1.17 + // Increase C1 compile threshold when the code cache is filled more
1.18 + // than specified by IncreaseFirstTierCompileThresholdAt percentage.
1.19 + // The main intention is to keep enough free space for C2 compiled code
1.20 + // to achieve peak performance if the code cache is under stress.
1.21 + if ((TieredStopAtLevel == CompLevel_full_optimization) && (level != CompLevel_full_optimization)) {
1.22 + double current_reverse_free_ratio = CodeCache::reverse_free_ratio();
1.23 + if (current_reverse_free_ratio > _increase_threshold_at_ratio) {
1.24 + k *= exp(current_reverse_free_ratio - _increase_threshold_at_ratio);
1.25 + }
1.26 + }
1.27 return k;
1.28 }
1.29
