rev 1083 : code cache unloading for webrev 091214
rev 1085 : checkpoint unloading changes on 100107
rev 1087 : use enum for passing compiler on/off state

   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 };
--- EOF ---