Add parallel recompilation time to histogram and plot execution pause times.

src/compiler.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 834 matching lines @@
   ASSERT(info->code().is_null());
   return false;
 }
 
 
 void Compiler::RecompileParallel(Handle<JSFunction> closure) {
   if (closure->IsInRecompileQueue()) return;
   ASSERT(closure->IsMarkedForParallelRecompilation());
 
   Isolate* isolate = closure->GetIsolate();
+  HistogramTimerScope timer(isolate->counters()->compile_parallel());
+
   if (!isolate->optimizing_compiler_thread()->IsQueueAvailable()) {
     if (FLAG_trace_parallel_recompilation) {
       PrintF("  ** Compilation queue, will retry opting on next run.\n");
     }
     return;
   }
 
   SmartPointer<CompilationInfo> info(new CompilationInfoWithZone(closure));
-  VMState state(isolate, PARALLEL_COMPILER_PROLOGUE);
+  VMState state(isolate, PARALLEL_COMPILER);
   PostponeInterruptsScope postpone(isolate);
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
   int compiled_size = shared->end_position() - shared->start_position();
   isolate->counters()->total_compile_size()->Increment(compiled_size);
   info->SetOptimizing(BailoutId::None());
 
   {
     CompilationHandleScope handle_scope(*info);
 
@@ skipping 27 matching lines @@
   }
 
   if (isolate->has_pending_exception()) {
     isolate->clear_pending_exception();
   }
 }
 
 
 void Compiler::InstallOptimizedCode(OptimizingCompiler* optimizing_compiler) {
   SmartPointer<CompilationInfo> info(optimizing_compiler->info());
+  Isolate* isolate = info->isolate();
+  VMState state(isolate, PARALLEL_COMPILER);
+  HistogramTimerScope timer(isolate->counters()->compile_parallel());
   // If crankshaft succeeded, install the optimized code else install
   // the unoptimized code.
   OptimizingCompiler::Status status = optimizing_compiler->last_status();
   if (status != OptimizingCompiler::SUCCEEDED) {
     optimizing_compiler->info()->set_bailout_reason(
         "failed/bailed out last time");
     status = optimizing_compiler->AbortOptimization();
   } else {
     status = optimizing_compiler->GenerateAndInstallCode();
     ASSERT(status == OptimizingCompiler::SUCCEEDED ||
@@ skipping 140 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal