src/hotspot/share/oops/methodCounters.hpp
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src/hotspot/share/oops/methodCounters.hpp

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   1 /*
   2  * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_METHODCOUNTERS_HPP
  26 #define SHARE_VM_OOPS_METHODCOUNTERS_HPP
  27 
  28 #include "oops/metadata.hpp"

  29 #include "compiler/compilerOracle.hpp"
  30 #include "interpreter/invocationCounter.hpp"
  31 #include "runtime/arguments.hpp"
  32 #include "utilities/align.hpp"
  33 
  34 class MethodCounters : public Metadata {
  35  friend class VMStructs;
  36  friend class JVMCIVMStructs;
  37  private:
  38   // If you add a new field that points to any metaspace object, you
  39   // must add this field to MethodCounters::metaspace_pointers_do().
  40 #if INCLUDE_AOT
  41   Method*           _method;                     // Back link to Method
  42 #endif
  43 #if COMPILER2_OR_JVMCI
  44   int               _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
  45   u2                _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
  46 #endif
  47 #if INCLUDE_JVMTI
  48   u2                _number_of_breakpoints;      // fullspeed debugging support


  79                                  , _rate(0),
  80                                    _prev_time(0),
  81                                    _highest_comp_level(0),
  82                                    _highest_osr_comp_level(0)
  83 #endif
  84   {
  85     set_interpreter_invocation_count(0);
  86     set_interpreter_throwout_count(0);
  87     JVMTI_ONLY(clear_number_of_breakpoints());
  88     invocation_counter()->init();
  89     backedge_counter()->init();
  90 
  91     if (StressCodeAging) {
  92       set_nmethod_age(HotMethodDetectionLimit);
  93     }
  94 
  95     // Set per-method thresholds.
  96     double scale = 1.0;
  97     CompilerOracle::has_option_value(mh, "CompileThresholdScaling", scale);
  98 
  99     int compile_threshold = Arguments::scaled_compile_threshold(CompileThreshold, scale);
 100     _interpreter_invocation_limit = compile_threshold << InvocationCounter::count_shift;
 101     if (ProfileInterpreter) {
 102       // If interpreter profiling is enabled, the backward branch limit
 103       // is compared against the method data counter rather than an invocation
 104       // counter, therefore no shifting of bits is required.
 105       _interpreter_backward_branch_limit = (compile_threshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100;
 106     } else {
 107       _interpreter_backward_branch_limit = ((compile_threshold * OnStackReplacePercentage) / 100) << InvocationCounter::count_shift;
 108     }
 109     _interpreter_profile_limit = ((compile_threshold * InterpreterProfilePercentage) / 100) << InvocationCounter::count_shift;
 110     _invoke_mask = right_n_bits(Arguments::scaled_freq_log(Tier0InvokeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
 111     _backedge_mask = right_n_bits(Arguments::scaled_freq_log(Tier0BackedgeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
 112   }
 113 
 114  public:
 115   virtual bool is_methodCounters() const volatile { return true; }
 116 
 117   static MethodCounters* allocate(const methodHandle& mh, TRAPS);
 118 
 119   void deallocate_contents(ClassLoaderData* loader_data) {}
 120 
 121   AOT_ONLY(Method* method() const { return _method; })
 122 
 123   static int method_counters_size() {
 124     return align_up((int)sizeof(MethodCounters), wordSize) / wordSize;
 125   }
 126   virtual int size() const {
 127     return method_counters_size();
 128   }
 129   void metaspace_pointers_do(MetaspaceClosure* it);
 130   MetaspaceObj::Type type() const { return MethodCountersType; }
 131   void clear_counters();


   1 /*
   2  * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_METHODCOUNTERS_HPP
  26 #define SHARE_VM_OOPS_METHODCOUNTERS_HPP
  27 
  28 #include "oops/metadata.hpp"
  29 #include "compiler/compilerConfig.hpp"
  30 #include "compiler/compilerOracle.hpp"
  31 #include "interpreter/invocationCounter.hpp"
  32 #include "runtime/arguments.hpp"
  33 #include "utilities/align.hpp"
  34 
  35 class MethodCounters : public Metadata {
  36  friend class VMStructs;
  37  friend class JVMCIVMStructs;
  38  private:
  39   // If you add a new field that points to any metaspace object, you
  40   // must add this field to MethodCounters::metaspace_pointers_do().
  41 #if INCLUDE_AOT
  42   Method*           _method;                     // Back link to Method
  43 #endif
  44 #if COMPILER2_OR_JVMCI
  45   int               _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
  46   u2                _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
  47 #endif
  48 #if INCLUDE_JVMTI
  49   u2                _number_of_breakpoints;      // fullspeed debugging support


  80                                  , _rate(0),
  81                                    _prev_time(0),
  82                                    _highest_comp_level(0),
  83                                    _highest_osr_comp_level(0)
  84 #endif
  85   {
  86     set_interpreter_invocation_count(0);
  87     set_interpreter_throwout_count(0);
  88     JVMTI_ONLY(clear_number_of_breakpoints());
  89     invocation_counter()->init();
  90     backedge_counter()->init();
  91 
  92     if (StressCodeAging) {
  93       set_nmethod_age(HotMethodDetectionLimit);
  94     }
  95 
  96     // Set per-method thresholds.
  97     double scale = 1.0;
  98     CompilerOracle::has_option_value(mh, "CompileThresholdScaling", scale);
  99 
 100     int compile_threshold = CompilerConfig::scaled_compile_threshold(CompileThreshold, scale);
 101     _interpreter_invocation_limit = compile_threshold << InvocationCounter::count_shift;
 102     if (ProfileInterpreter) {
 103       // If interpreter profiling is enabled, the backward branch limit
 104       // is compared against the method data counter rather than an invocation
 105       // counter, therefore no shifting of bits is required.
 106       _interpreter_backward_branch_limit = (compile_threshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100;
 107     } else {
 108       _interpreter_backward_branch_limit = ((compile_threshold * OnStackReplacePercentage) / 100) << InvocationCounter::count_shift;
 109     }
 110     _interpreter_profile_limit = ((compile_threshold * InterpreterProfilePercentage) / 100) << InvocationCounter::count_shift;
 111     _invoke_mask = right_n_bits(CompilerConfig::scaled_freq_log(Tier0InvokeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
 112     _backedge_mask = right_n_bits(CompilerConfig::scaled_freq_log(Tier0BackedgeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
 113   }
 114 
 115  public:
 116   virtual bool is_methodCounters() const volatile { return true; }
 117 
 118   static MethodCounters* allocate(const methodHandle& mh, TRAPS);
 119 
 120   void deallocate_contents(ClassLoaderData* loader_data) {}
 121 
 122   AOT_ONLY(Method* method() const { return _method; })
 123 
 124   static int method_counters_size() {
 125     return align_up((int)sizeof(MethodCounters), wordSize) / wordSize;
 126   }
 127   virtual int size() const {
 128     return method_counters_size();
 129   }
 130   void metaspace_pointers_do(MetaspaceClosure* it);
 131   MetaspaceObj::Type type() const { return MethodCountersType; }
 132   void clear_counters();


src/hotspot/share/oops/methodCounters.hpp
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