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1 /*
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2 * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class nmethod;
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26 class nmethodLocker;
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27
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28 // CompileTask
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29 //
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30 // An entry in the compile queue. It represents a pending or current
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31 // compilation.
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32 class CompileTask : public CHeapObj {
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33 private:
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34 Monitor* _lock;
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35 uint _compile_id;
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36 jobject _method;
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37 int _osr_bci;
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38 bool _is_complete;
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39 bool _is_success;
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40 bool _is_blocking;
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41 int _comp_level;
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42 int _num_inlined_bytecodes;
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43 nmethodLocker* _code_handle; // holder of eventual result
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44 CompileTask* _next;
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45
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46 // Fields used for logging why the compilation was initiated:
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47 jlong _time_queued; // in units of os::elapsed_counter()
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48 jobject _hot_method; // which method actually triggered this task
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49 int _hot_count; // information about its invocation counter
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50 const char* _comment; // more info about the task
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51
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52 public:
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53 CompileTask() {
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54 _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");
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55 }
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56
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57 void initialize(int compile_id, methodHandle method, int osr_bci, int comp_level,
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58 methodHandle hot_method, int hot_count, const char* comment,
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59 bool is_blocking);
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60
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61 void free();
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62
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63 int compile_id() const { return _compile_id; }
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64 jobject method_handle() const { return _method; }
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65 int osr_bci() const { return _osr_bci; }
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66 bool is_complete() const { return _is_complete; }
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67 bool is_blocking() const { return _is_blocking; }
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68 bool is_success() const { return _is_success; }
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69
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70 nmethodLocker* code_handle() const { return _code_handle; }
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71 void set_code_handle(nmethodLocker* l) { _code_handle = l; }
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72 nmethod* code() const; // _code_handle->code()
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73 void set_code(nmethod* nm); // _code_handle->set_code(nm)
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74
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75 Monitor* lock() const { return _lock; }
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76
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77 void mark_complete() { _is_complete = true; }
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78 void mark_success() { _is_success = true; }
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79
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80 int comp_level() { return _comp_level;}
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81 void set_comp_level(int comp_level) { _comp_level = comp_level;}
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82
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83 int num_inlined_bytecodes() const { return _num_inlined_bytecodes; }
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84 void set_num_inlined_bytecodes(int n) { _num_inlined_bytecodes = n; }
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85
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86 CompileTask* next() const { return _next; }
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87 void set_next(CompileTask* next) { _next = next; }
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88
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89 void print();
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90 void print_line();
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91 void print_line_on_error(outputStream* st, char* buf, int buflen);
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92 void log_task(xmlStream* log);
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93 void log_task_queued();
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94 void log_task_start(CompileLog* log);
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95 void log_task_done(CompileLog* log);
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96
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97 };
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98
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99 // CompilerCounters
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100 //
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101 // Per Compiler Performance Counters.
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102 //
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103 class CompilerCounters : public CHeapObj {
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104
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105 public:
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106 enum {
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107 cmname_buffer_length = 160
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108 };
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109
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110 private:
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111
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112 char _current_method[cmname_buffer_length];
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113 PerfStringVariable* _perf_current_method;
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114
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115 int _compile_type;
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116 PerfVariable* _perf_compile_type;
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117
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118 PerfCounter* _perf_time;
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119 PerfCounter* _perf_compiles;
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120
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121 public:
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122 CompilerCounters(const char* name, int instance, TRAPS);
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123
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124 // these methods should be called in a thread safe context
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125
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126 void set_current_method(const char* method) {
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127 strncpy(_current_method, method, (size_t)cmname_buffer_length);
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128 if (UsePerfData) _perf_current_method->set_value(method);
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129 }
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130
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131 char* current_method() { return _current_method; }
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132
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133 void set_compile_type(int compile_type) {
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134 _compile_type = compile_type;
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135 if (UsePerfData) _perf_compile_type->set_value((jlong)compile_type);
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136 }
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137
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138 int compile_type() { return _compile_type; }
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139
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140 PerfCounter* time_counter() { return _perf_time; }
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141 PerfCounter* compile_counter() { return _perf_compiles; }
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142 };
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143
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144
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145 // CompileQueue
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146 //
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147 // A list of CompileTasks.
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148 class CompileQueue : public CHeapObj {
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149 private:
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150 const char* _name;
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151 Monitor* _lock;
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152
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153 CompileTask* _first;
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154 CompileTask* _last;
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155
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156 public:
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157 CompileQueue(const char* name, Monitor* lock) {
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158 _name = name;
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159 _lock = lock;
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160 _first = NULL;
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161 _last = NULL;
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162 }
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163
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164 const char* name() const { return _name; }
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165 Monitor* lock() const { return _lock; }
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166
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167 void add(CompileTask* task);
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168
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169 CompileTask* get();
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170
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171 bool is_empty() const { return _first == NULL; }
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172
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173 void print();
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174 };
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175
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176
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177 // Compilation
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178 //
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179 // The broker for all compilation requests.
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180 class CompileBroker: AllStatic {
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181 friend class Threads;
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182 friend class CompileTaskWrapper;
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183
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184 public:
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185 enum {
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186 name_buffer_length = 100
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187 };
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188
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189 // Compile type Information for print_last_compile() and CompilerCounters
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190 enum { no_compile, normal_compile, osr_compile, native_compile };
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191
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192 private:
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193 static bool _initialized;
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194 static volatile bool _should_block;
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195
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1202
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196 // This flag can be used to stop compilation or turn it back on
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197 static volatile jint _should_compile_new_jobs;
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198
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199 // The installed compiler(s)
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200 static AbstractCompiler* _compilers[2];
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201
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202 // These counters are used for assigning id's to each compilation
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203 static uint _compilation_id;
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204 static uint _osr_compilation_id;
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205 static uint _native_compilation_id;
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206
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207 static int _last_compile_type;
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208 static int _last_compile_level;
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209 static char _last_method_compiled[name_buffer_length];
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210
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211 static CompileQueue* _method_queue;
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212 static CompileTask* _task_free_list;
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213
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214 static GrowableArray<CompilerThread*>* _method_threads;
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215
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216 // performance counters
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217 static PerfCounter* _perf_total_compilation;
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218 static PerfCounter* _perf_native_compilation;
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219 static PerfCounter* _perf_osr_compilation;
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220 static PerfCounter* _perf_standard_compilation;
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221
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222 static PerfCounter* _perf_total_bailout_count;
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223 static PerfCounter* _perf_total_invalidated_count;
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224 static PerfCounter* _perf_total_compile_count;
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225 static PerfCounter* _perf_total_native_compile_count;
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226 static PerfCounter* _perf_total_osr_compile_count;
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227 static PerfCounter* _perf_total_standard_compile_count;
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228
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229 static PerfCounter* _perf_sum_osr_bytes_compiled;
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230 static PerfCounter* _perf_sum_standard_bytes_compiled;
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231 static PerfCounter* _perf_sum_nmethod_size;
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232 static PerfCounter* _perf_sum_nmethod_code_size;
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233
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234 static PerfStringVariable* _perf_last_method;
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235 static PerfStringVariable* _perf_last_failed_method;
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236 static PerfStringVariable* _perf_last_invalidated_method;
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237 static PerfVariable* _perf_last_compile_type;
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238 static PerfVariable* _perf_last_compile_size;
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239 static PerfVariable* _perf_last_failed_type;
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240 static PerfVariable* _perf_last_invalidated_type;
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241
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242 // Timers and counters for generating statistics
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243 static elapsedTimer _t_total_compilation;
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244 static elapsedTimer _t_osr_compilation;
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245 static elapsedTimer _t_standard_compilation;
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246
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247 static int _total_bailout_count;
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248 static int _total_invalidated_count;
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249 static int _total_compile_count;
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250 static int _total_native_compile_count;
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251 static int _total_osr_compile_count;
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252 static int _total_standard_compile_count;
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253
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254 static int _sum_osr_bytes_compiled;
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255 static int _sum_standard_bytes_compiled;
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256 static int _sum_nmethod_size;
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257 static int _sum_nmethod_code_size;
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258
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259 static int compiler_count() {
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260 return CICompilerCountPerCPU
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261 // Example: if CICompilerCountPerCPU is true, then we get
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262 // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine.
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263 // May help big-app startup time.
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264 ? (MAX2(log2_intptr(os::active_processor_count())-1,1))
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265 : CICompilerCount;
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266 }
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267
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268 static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS);
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269 static void init_compiler_threads(int compiler_count);
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270 static bool compilation_is_complete (methodHandle method, int osr_bci, int comp_level);
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271 static bool compilation_is_in_queue (methodHandle method, int osr_bci);
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272 static bool compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level);
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273 static uint assign_compile_id (methodHandle method, int osr_bci);
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274 static bool is_compile_blocking (methodHandle method, int osr_bci);
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275 static void preload_classes (methodHandle method, TRAPS);
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276
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277 static CompileTask* create_compile_task(CompileQueue* queue,
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278 int compile_id,
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279 methodHandle method,
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280 int osr_bci,
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281 int comp_level,
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282 methodHandle hot_method,
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283 int hot_count,
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284 const char* comment,
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285 bool blocking);
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286 static CompileTask* allocate_task();
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287 static void free_task(CompileTask* task);
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288 static void wait_for_completion(CompileTask* task);
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289
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290 static void invoke_compiler_on_method(CompileTask* task);
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291 static void set_last_compile(CompilerThread *thread, methodHandle method, bool is_osr, int comp_level);
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292 static void push_jni_handle_block();
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293 static void pop_jni_handle_block();
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294 static bool check_break_at(methodHandle method, int compile_id, bool is_osr);
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295 static void collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task);
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296
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297 static void compile_method_base(methodHandle method,
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298 int osr_bci,
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299 int comp_level,
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300 methodHandle hot_method,
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301 int hot_count,
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302 const char* comment,
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303 TRAPS);
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304
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305 public:
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306 enum {
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307 // The entry bci used for non-OSR compilations.
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308 standard_entry_bci = InvocationEntryBci
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309 };
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310
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311 static AbstractCompiler* compiler(int level ) {
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312 if (level == CompLevel_fast_compile) return _compilers[0];
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313 assert(level == CompLevel_highest_tier, "what level?")
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314 return _compilers[1];
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315 }
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316
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317 static void compilation_init();
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318 static void init_compiler_thread_log();
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319 static nmethod* compile_method(methodHandle method, int osr_bci,
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320 methodHandle hot_method, int hot_count,
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321 const char* comment, TRAPS);
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322
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323 static void compiler_thread_loop();
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324
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325 static uint get_compilation_id() { return _compilation_id; }
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326 static bool is_idle();
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327
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328 // Set _should_block.
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329 // Call this from the VM, with Threads_lock held and a safepoint requested.
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330 static void set_should_block();
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331
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332 // Call this from the compiler at convenient points, to poll for _should_block.
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333 static void maybe_block();
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334
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1202
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335 enum {
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336 // Flags for toggling compiler activity
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337 stop_compilation = 0,
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338 run_compilation = 1
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339 };
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340
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341 static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }
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342 static bool set_should_compile_new_jobs(jint new_state) {
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343 // Return success if the current caller set it
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344 jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);
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345 return (old == (1-new_state));
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346 }
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347 static void handle_full_code_cache();
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348
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349 // Return total compilation ticks
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350 static jlong total_compilation_ticks() {
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351 return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;
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352 }
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353
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354 // Print a detailed accounting of compilation time
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355 static void print_times();
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356
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357 // Debugging output for failure
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358 static void print_last_compile();
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359
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360 static void print_compiler_threads_on(outputStream* st);
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361 };
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