jdk8-mips64-public/hotspot: src/share/vm/compiler/compileBroker.hpp@61d955db2a5b (annotated)

src/share/vm/compiler/compileBroker.hpp@61d955db2a5b (annotated)

src/share/vm/compiler/compileBroker.hpp

Wed, 05 Jun 2019 03:07:31 +0100

author: xliu
date: Wed, 05 Jun 2019 03:07:31 +0100
changeset 9690: 61d955db2a5b
parent 7302: 41dcdd636080
child 9703: 2fdf635bcf28
child 9920: 3a3803a0c789
permissions: -rw-r--r--

8222670: pathological case of JIT recompilation and code cache bloat
Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: sgehwolf, thartmann, andrew

 /*
  * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_COMPILER_COMPILEBROKER_HPP
 #define SHARE_VM_COMPILER_COMPILEBROKER_HPP
 #include "ci/compilerInterface.hpp"
 #include "compiler/abstractCompiler.hpp"
 #include "runtime/perfData.hpp"
 class nmethod;
 class nmethodLocker;
 // CompileTask
 //
 // An entry in the compile queue.  It represents a pending or current
 // compilation.
 class CompileTask : public CHeapObj<mtCompiler> {
   friend class VMStructs;
  private:
   static CompileTask* _task_free_list;
 #ifdef ASSERT
   static int          _num_allocated_tasks;
 #endif
   Monitor*     _lock;
   uint         _compile_id;
   Method*      _method;
   jobject      _method_holder;
   int          _osr_bci;
   bool         _is_complete;
   bool         _is_success;
   bool         _is_blocking;
   int          _comp_level;
   int          _num_inlined_bytecodes;
   nmethodLocker* _code_handle;  // holder of eventual result
   CompileTask* _next, *_prev;
   bool         _is_free;
   // Fields used for logging why the compilation was initiated:
   jlong        _time_queued;  // in units of os::elapsed_counter()
   Method*      _hot_method;   // which method actually triggered this task
   jobject      _hot_method_holder;
   int          _hot_count;    // information about its invocation counter
   const char*  _comment;      // more info about the task
   const char*  _failure_reason;
  public:
   CompileTask() {
     _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");
   }
   void initialize(int compile_id, methodHandle method, int osr_bci, int comp_level,
                   methodHandle hot_method, int hot_count, const char* comment,
                   bool is_blocking);
   static CompileTask* allocate();
   static void         free(CompileTask* task);
   int          compile_id() const                { return _compile_id; }
   Method*      method() const                    { return _method; }
   int          osr_bci() const                   { return _osr_bci; }
   bool         is_complete() const               { return _is_complete; }
   bool         is_blocking() const               { return _is_blocking; }
   bool         is_success() const                { return _is_success; }
   nmethodLocker* code_handle() const             { return _code_handle; }
   void         set_code_handle(nmethodLocker* l) { _code_handle = l; }
   nmethod*     code() const;                     // _code_handle->code()
   void         set_code(nmethod* nm);            // _code_handle->set_code(nm)
   Monitor*     lock() const                      { return _lock; }
   void         mark_complete()                   { _is_complete = true; }
   void         mark_success()                    { _is_success = true; }
   int          comp_level()                      { return _comp_level;}
   void         set_comp_level(int comp_level)    { _comp_level = comp_level;}
   int          num_inlined_bytecodes() const     { return _num_inlined_bytecodes; }
   void         set_num_inlined_bytecodes(int n)  { _num_inlined_bytecodes = n; }
   CompileTask* next() const                      { return _next; }
   void         set_next(CompileTask* next)       { _next = next; }
   CompileTask* prev() const                      { return _prev; }
   void         set_prev(CompileTask* prev)       { _prev = prev; }
   bool         is_free() const                   { return _is_free; }
   void         set_is_free(bool val)             { _is_free = val; }
 private:
   static void  print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
                                       bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,
                                       const char* msg = NULL, bool short_form = false);
 public:
   void         print_compilation(outputStream* st = tty, const char* msg = NULL, bool short_form = false);
   static void  print_compilation(outputStream* st, const nmethod* nm, const char* msg = NULL, bool short_form = false) {
     print_compilation_impl(st, nm->method(), nm->compile_id(), nm->comp_level(),
                            nm->is_osr_method(), nm->is_osr_method() ? nm->osr_entry_bci() : -1, /*is_blocking*/ false,
                            msg, short_form);
   }
   static void  print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg = NULL);
   static void  print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
     print_inlining(tty, method, inline_level, bci, msg);
   }
   // Redefine Classes support
   void mark_on_stack();
   static void  print_inline_indent(int inline_level, outputStream* st = tty);
   void         print();
   void         print_line();
   void         print_line_on_error(outputStream* st, char* buf, int buflen);
   void         log_task(xmlStream* log);
   void         log_task_queued();
   void         log_task_start(CompileLog* log);
   void         log_task_done(CompileLog* log);
   void         set_failure_reason(const char* reason) {
     _failure_reason = reason;
   }
 };
 // CompilerCounters
 //
 // Per Compiler Performance Counters.
 //
 class CompilerCounters : public CHeapObj<mtCompiler> {
   public:
     enum {
       cmname_buffer_length = 160
     };
   private:
     char _current_method[cmname_buffer_length];
     PerfStringVariable* _perf_current_method;
     int  _compile_type;
     PerfVariable* _perf_compile_type;
     PerfCounter* _perf_time;
     PerfCounter* _perf_compiles;
   public:
     CompilerCounters(const char* name, int instance, TRAPS);
     // these methods should be called in a thread safe context
     void set_current_method(const char* method) {
       strncpy(_current_method, method, (size_t)cmname_buffer_length);
       if (UsePerfData) _perf_current_method->set_value(method);
     }
     char* current_method()                  { return _current_method; }
     void set_compile_type(int compile_type) {
       _compile_type = compile_type;
       if (UsePerfData) _perf_compile_type->set_value((jlong)compile_type);
     }
     int compile_type()                       { return _compile_type; }
     PerfCounter* time_counter()              { return _perf_time; }
     PerfCounter* compile_counter()           { return _perf_compiles; }
 };
 // CompileQueue
 //
 // A list of CompileTasks.
 class CompileQueue : public CHeapObj<mtCompiler> {
  private:
   const char* _name;
   Monitor*    _lock;
   CompileTask* _first;
   CompileTask* _last;
   CompileTask* _first_stale;
   int _size;
   void purge_stale_tasks();
  public:
   CompileQueue(const char* name, Monitor* lock) {
     _name = name;
     _lock = lock;
     _first = NULL;
     _last = NULL;
     _size = 0;
     _first_stale = NULL;
   }
   const char*  name() const                      { return _name; }
   Monitor*     lock() const                      { return _lock; }
   void         add(CompileTask* task);
   void         remove(CompileTask* task);
   void         remove_and_mark_stale(CompileTask* task);
   CompileTask* first()                           { return _first; }
   CompileTask* last()                            { return _last;  }
   CompileTask* get();
   bool         is_empty() const                  { return _first == NULL; }
   int          size()     const                  { return _size;          }
   // Redefine Classes support
   void mark_on_stack();
   void free_all();
   NOT_PRODUCT (void print();)
   ~CompileQueue() {
     assert (is_empty(), " Compile Queue must be empty");
   }
 };
 // CompileTaskWrapper
 //
 // Assign this task to the current thread.  Deallocate the task
 // when the compilation is complete.
 class CompileTaskWrapper : StackObj {
 public:
   CompileTaskWrapper(CompileTask* task);
   ~CompileTaskWrapper();
 };
 // Compilation
 //
 // The broker for all compilation requests.
 class CompileBroker: AllStatic {
  friend class Threads;
   friend class CompileTaskWrapper;
  public:
   enum {
     name_buffer_length = 100
   };
   // Compile type Information for print_last_compile() and CompilerCounters
   enum { no_compile, normal_compile, osr_compile, native_compile };
   static int assign_compile_id (methodHandle method, int osr_bci);
  private:
   static bool _initialized;
   static volatile bool _should_block;
   // This flag can be used to stop compilation or turn it back on
   static volatile jint _should_compile_new_jobs;
   // The installed compiler(s)
   static AbstractCompiler* _compilers[2];
   // These counters are used for assigning id's to each compilation
   static volatile jint _compilation_id;
   static volatile jint _osr_compilation_id;
   static int  _last_compile_type;
   static int  _last_compile_level;
   static char _last_method_compiled[name_buffer_length];
   static CompileQueue* _c2_compile_queue;
   static CompileQueue* _c1_compile_queue;
   static GrowableArray<CompilerThread*>* _compiler_threads;
   // performance counters
   static PerfCounter* _perf_total_compilation;
   static PerfCounter* _perf_native_compilation;
   static PerfCounter* _perf_osr_compilation;
   static PerfCounter* _perf_standard_compilation;
   static PerfCounter* _perf_total_bailout_count;
   static PerfCounter* _perf_total_invalidated_count;
   static PerfCounter* _perf_total_compile_count;
   static PerfCounter* _perf_total_native_compile_count;
   static PerfCounter* _perf_total_osr_compile_count;
   static PerfCounter* _perf_total_standard_compile_count;
   static PerfCounter* _perf_sum_osr_bytes_compiled;
   static PerfCounter* _perf_sum_standard_bytes_compiled;
   static PerfCounter* _perf_sum_nmethod_size;
   static PerfCounter* _perf_sum_nmethod_code_size;
   static PerfStringVariable* _perf_last_method;
   static PerfStringVariable* _perf_last_failed_method;
   static PerfStringVariable* _perf_last_invalidated_method;
   static PerfVariable*       _perf_last_compile_type;
   static PerfVariable*       _perf_last_compile_size;
   static PerfVariable*       _perf_last_failed_type;
   static PerfVariable*       _perf_last_invalidated_type;
   // Timers and counters for generating statistics
   static elapsedTimer _t_total_compilation;
   static elapsedTimer _t_osr_compilation;
   static elapsedTimer _t_standard_compilation;
   static int _total_compile_count;
   static int _total_bailout_count;
   static int _total_invalidated_count;
   static int _total_native_compile_count;
   static int _total_osr_compile_count;
   static int _total_standard_compile_count;
   static int _sum_osr_bytes_compiled;
   static int _sum_standard_bytes_compiled;
   static int _sum_nmethod_size;
   static int _sum_nmethod_code_size;
   static long _peak_compilation_time;
   static volatile jint _print_compilation_warning;
   static CompilerThread* make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, AbstractCompiler* comp, TRAPS);
   static void init_compiler_threads(int c1_compiler_count, int c2_compiler_count);
   static bool compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level);
   static bool is_compile_blocking      ();
   static void preload_classes          (methodHandle method, TRAPS);
   static CompileTask* create_compile_task(CompileQueue* queue,
                                           int           compile_id,
                                           methodHandle  method,
                                           int           osr_bci,
                                           int           comp_level,
                                           methodHandle  hot_method,
                                           int           hot_count,
                                           const char*   comment,
                                           bool          blocking);
   static void wait_for_completion(CompileTask* task);
   static void invoke_compiler_on_method(CompileTask* task);
   static void set_last_compile(CompilerThread *thread, methodHandle method, bool is_osr, int comp_level);
   static void push_jni_handle_block();
   static void pop_jni_handle_block();
   static bool check_break_at(methodHandle method, int compile_id, bool is_osr);
   static void collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task);
   static void compile_method_base(methodHandle method,
                                   int osr_bci,
                                   int comp_level,
                                   methodHandle hot_method,
                                   int hot_count,
                                   const char* comment,
                                   Thread* thread);
   static CompileQueue* compile_queue(int comp_level) {
     if (is_c2_compile(comp_level)) return _c2_compile_queue;
     if (is_c1_compile(comp_level)) return _c1_compile_queue;
     return NULL;
   }
   static bool init_compiler_runtime();
   static void shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread);
  public:
   enum {
     // The entry bci used for non-OSR compilations.
     standard_entry_bci = InvocationEntryBci
   };
   static AbstractCompiler* compiler(int comp_level) {
     if (is_c2_compile(comp_level)) return _compilers[1]; // C2
     if (is_c1_compile(comp_level)) return _compilers[0]; // C1
     return NULL;
   }
   static bool compilation_is_complete(methodHandle method, int osr_bci, int comp_level);
   static bool compilation_is_in_queue(methodHandle method);
   static int queue_size(int comp_level) {
     CompileQueue *q = compile_queue(comp_level);
     return q != NULL ? q->size() : 0;
   }
   static void compilation_init();
   static void init_compiler_thread_log();
   static nmethod* compile_method(methodHandle method,
                                  int osr_bci,
                                  int comp_level,
                                  methodHandle hot_method,
                                  int hot_count,
                                  const char* comment, Thread* thread);
   static void compiler_thread_loop();
   static uint get_compilation_id() { return _compilation_id; }
   // Set _should_block.
   // Call this from the VM, with Threads_lock held and a safepoint requested.
   static void set_should_block();
   // Call this from the compiler at convenient points, to poll for _should_block.
   static void maybe_block();
   enum {
     // Flags for toggling compiler activity
     stop_compilation    = 0,
     run_compilation     = 1,
     shutdown_compilaton = 2
   };
   static bool should_compile_new_jobs() { return UseCompiler && (_should_compile_new_jobs == run_compilation); }
   static bool set_should_compile_new_jobs(jint new_state) {
     // Return success if the current caller set it
     jint old = Atomic::cmpxchg(new_state, &_should_compile_new_jobs, 1-new_state);
     return (old == (1-new_state));
   }
   static void disable_compilation_forever() {
     UseCompiler               = false;
     AlwaysCompileLoopMethods  = false;
     Atomic::xchg(shutdown_compilaton, &_should_compile_new_jobs);
   }
   static bool is_compilation_disabled_forever() {
     return _should_compile_new_jobs == shutdown_compilaton;
   }
   static void handle_full_code_cache();
   // Ensures that warning is only printed once.
   static bool should_print_compiler_warning() {
     jint old = Atomic::cmpxchg(1, &_print_compilation_warning, 0);
     return old == 0;
   }
   // Return total compilation ticks
   static jlong total_compilation_ticks() {
     return _perf_total_compilation != NULL ? _perf_total_compilation->get_value() : 0;
   }
   // Redefine Classes support
   static void mark_on_stack();
   // Print a detailed accounting of compilation time
   static void print_times();
   // Debugging output for failure
   static void print_last_compile();
   static void print_compiler_threads_on(outputStream* st);
   // compiler name for debugging
   static const char* compiler_name(int comp_level);
   static int get_total_compile_count() {          return _total_compile_count; }
   static int get_total_bailout_count() {          return _total_bailout_count; }
   static int get_total_invalidated_count() {      return _total_invalidated_count; }
   static int get_total_native_compile_count() {   return _total_native_compile_count; }
   static int get_total_osr_compile_count() {      return _total_osr_compile_count; }
   static int get_total_standard_compile_count() { return _total_standard_compile_count; }
   static int get_sum_osr_bytes_compiled() {       return _sum_osr_bytes_compiled; }
   static int get_sum_standard_bytes_compiled() {  return _sum_standard_bytes_compiled; }
   static int get_sum_nmethod_size() {             return _sum_nmethod_size;}
   static int get_sum_nmethod_code_size() {        return _sum_nmethod_code_size; }
   static long get_peak_compilation_time() {       return _peak_compilation_time; }
   static long get_total_compilation_time() {      return _t_total_compilation.milliseconds(); }
 };
 #endif // SHARE_VM_COMPILER_COMPILEBROKER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/compiler/compileBroker.hpp@61d955db2a5b (annotated)

src/share/vm/compiler/compileBroker.hpp