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