Optimize functions on a second thread.

src/execution.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 428 matching lines @@
     thread_local_.interrupt_flags_ |= RUNTIME_PROFILER_TICK;
     if (thread_local_.postpone_interrupts_nesting_ == 0) {
       thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
       isolate_->heap()->SetStackLimits();
     }
     ExecutionAccess::Unlock(isolate_);
   }
 }
 
 
+void StackGuard::RequestCodeReadyEvent() {
+  ASSERT(FLAG_parallel_recompilation);
+  if (ExecutionAccess::TryLock(isolate_)) {
+    thread_local_.interrupt_flags_ |= CODE_READY;
+    if (thread_local_.postpone_interrupts_nesting_ == 0) {
+      thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
+      isolate_->heap()->SetStackLimits();
+    }
+    ExecutionAccess::Unlock(isolate_);
+  }
+}
+
+
+bool StackGuard::IsCodeReadyEvent() {
+  ExecutionAccess access(isolate_);
+  return (thread_local_.interrupt_flags_ & CODE_READY) != 0;
+}
+
+
 bool StackGuard::IsGCRequest() {
   ExecutionAccess access(isolate_);
   return (thread_local_.interrupt_flags_ & GC_REQUEST) != 0;
 }
 
 
 void StackGuard::RequestGC() {
   ExecutionAccess access(isolate_);
   thread_local_.interrupt_flags_ |= GC_REQUEST;
   if (thread_local_.postpone_interrupts_nesting_ == 0) {
@@ skipping 445 matching lines @@
   if (stack_guard->ShouldPostponeInterrupts()) {
     return isolate->heap()->undefined_value();
   }
 
   if (stack_guard->IsGCRequest()) {
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "StackGuard GC request");
     stack_guard->Continue(GC_REQUEST);
   }
 
+  if (stack_guard->IsCodeReadyEvent()) {
+    ASSERT(FLAG_parallel_recompilation);
+    if (FLAG_trace_parallel_recompilation) {
+      PrintF("  ** CODE_READY event received.\n");
+    }
+    stack_guard->Continue(CODE_READY);
+  }
+  if (!stack_guard->IsTerminateExecution()) {
+    isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
+  }
+
   isolate->counters()->stack_interrupts()->Increment();
   // If FLAG_count_based_interrupts, every interrupt is a profiler interrupt.
   if (FLAG_count_based_interrupts ||
       stack_guard->IsRuntimeProfilerTick()) {
     isolate->counters()->runtime_profiler_ticks()->Increment();
     stack_guard->Continue(RUNTIME_PROFILER_TICK);
     isolate->runtime_profiler()->OptimizeNow();
   }
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (stack_guard->IsDebugBreak() || stack_guard->IsDebugCommand()) {
     DebugBreakHelper();
   }
 #endif
   if (stack_guard->IsPreempted()) RuntimePreempt();
   if (stack_guard->IsTerminateExecution()) {
     stack_guard->Continue(TERMINATE);
     return isolate->TerminateExecution();
   }
   if (stack_guard->IsInterrupted()) {
     stack_guard->Continue(INTERRUPT);
     return isolate->StackOverflow();
   }
+

[Yang, 2012/07/19 12:47:30]

Stray edit?

[sanjoy, 2012/07/19 15:06:09]

Done.

   return isolate->heap()->undefined_value();
 }
 
 
 } }  // namespace v8::internal