1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/methodCounters.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,124 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OOPS_METHODCOUNTERS_HPP
1.29 +#define SHARE_VM_OOPS_METHODCOUNTERS_HPP
1.30 +
1.31 +#include "oops/metadata.hpp"
1.32 +#include "interpreter/invocationCounter.hpp"
1.33 +
1.34 +class MethodCounters: public MetaspaceObj {
1.35 + friend class VMStructs;
1.36 + private:
1.37 + int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
1.38 + u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
1.39 + u2 _number_of_breakpoints; // fullspeed debugging support
1.40 + InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
1.41 + InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
1.42 +
1.43 +#ifdef TIERED
1.44 + float _rate; // Events (invocation and backedge counter increments) per millisecond
1.45 + jlong _prev_time; // Previous time the rate was acquired
1.46 +#endif
1.47 +
1.48 + MethodCounters() : _interpreter_invocation_count(0),
1.49 + _interpreter_throwout_count(0),
1.50 + _number_of_breakpoints(0)
1.51 +#ifdef TIERED
1.52 + , _rate(0),
1.53 + _prev_time(0)
1.54 +#endif
1.55 + {
1.56 + invocation_counter()->init();
1.57 + backedge_counter()->init();
1.58 + }
1.59 +
1.60 + public:
1.61 + static MethodCounters* allocate(ClassLoaderData* loader_data, TRAPS);
1.62 +
1.63 + void deallocate_contents(ClassLoaderData* loader_data) {}
1.64 + DEBUG_ONLY(bool on_stack() { return false; }) // for template
1.65 +
1.66 + static int size() { return sizeof(MethodCounters) / wordSize; }
1.67 +
1.68 + bool is_klass() const { return false; }
1.69 +
1.70 + void clear_counters();
1.71 +
1.72 + int interpreter_invocation_count() {
1.73 + return _interpreter_invocation_count;
1.74 + }
1.75 + void set_interpreter_invocation_count(int count) {
1.76 + _interpreter_invocation_count = count;
1.77 + }
1.78 + int increment_interpreter_invocation_count() {
1.79 + return ++_interpreter_invocation_count;
1.80 + }
1.81 +
1.82 + void interpreter_throwout_increment() {
1.83 + if (_interpreter_throwout_count < 65534) {
1.84 + _interpreter_throwout_count++;
1.85 + }
1.86 + }
1.87 + int interpreter_throwout_count() const {
1.88 + return _interpreter_throwout_count;
1.89 + }
1.90 + void set_interpreter_throwout_count(int count) {
1.91 + _interpreter_throwout_count = count;
1.92 + }
1.93 +
1.94 + u2 number_of_breakpoints() const { return _number_of_breakpoints; }
1.95 + void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
1.96 + void decr_number_of_breakpoints() { --_number_of_breakpoints; }
1.97 + void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
1.98 +
1.99 +#ifdef TIERED
1.100 + jlong prev_time() const { return _prev_time; }
1.101 + void set_prev_time(jlong time) { _prev_time = time; }
1.102 + float rate() const { return _rate; }
1.103 + void set_rate(float rate) { _rate = rate; }
1.104 +#endif
1.105 +
1.106 + // invocation counter
1.107 + InvocationCounter* invocation_counter() { return &_invocation_counter; }
1.108 + InvocationCounter* backedge_counter() { return &_backedge_counter; }
1.109 +
1.110 + static ByteSize interpreter_invocation_counter_offset() {
1.111 + return byte_offset_of(MethodCounters, _interpreter_invocation_count);
1.112 + }
1.113 +
1.114 + static ByteSize invocation_counter_offset() {
1.115 + return byte_offset_of(MethodCounters, _invocation_counter);
1.116 + }
1.117 +
1.118 + static ByteSize backedge_counter_offset() {
1.119 + return byte_offset_of(MethodCounters, _backedge_counter);
1.120 + }
1.121 +
1.122 + static int interpreter_invocation_counter_offset_in_bytes() {
1.123 + return offset_of(MethodCounters, _interpreter_invocation_count);
1.124 + }
1.125 +
1.126 +};
1.127 +#endif //SHARE_VM_OOPS_METHODCOUNTERS_HPP
