Support higher CPU profiler sampling rate on posix systems

test/cctest/test-cpu-profiler.cc

 // Copyright 2010 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 30 matching lines @@
 using i::ProfileGenerator;
 using i::ProfileNode;
 using i::ProfilerEventsProcessor;
 using i::ScopedVector;
 using i::Vector;
 
 
 TEST(StartStop) {
   CpuProfilesCollection profiles;
   ProfileGenerator generator(&profiles);
-  ProfilerEventsProcessor processor(&generator);
+  ProfilerEventsProcessor processor(&generator, NULL, 100);
   processor.Start();
   processor.StopSynchronously();
   processor.Join();
 }
 
 
 static inline i::Address ToAddress(int n) {
   return reinterpret_cast<i::Address>(n);
 }
 
@@ skipping 70 matching lines @@
   i::Code* comment_code = CreateCode(&env);
   i::Code* args5_code = CreateCode(&env);
   i::Code* comment2_code = CreateCode(&env);
   i::Code* moved_code = CreateCode(&env);
   i::Code* args3_code = CreateCode(&env);
   i::Code* args4_code = CreateCode(&env);
 
   CpuProfilesCollection* profiles = new CpuProfilesCollection;
   profiles->StartProfiling("", 1, false);
   ProfileGenerator generator(profiles);
-  ProfilerEventsProcessor processor(&generator);
+  ProfilerEventsProcessor processor(&generator, NULL, 100);
   processor.Start();
   CpuProfiler profiler(isolate, profiles, &generator, &processor);
 
   // Enqueue code creation events.
   const char* aaa_str = "aaa";
   i::Handle<i::String> aaa_name = factory->NewStringFromAscii(
       i::Vector<const char>(aaa_str, i::StrLength(aaa_str)));
   profiler.CodeCreateEvent(i::Logger::FUNCTION_TAG, aaa_code, *aaa_name);
   profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, comment_code, "comment");
   profiler.CodeCreateEvent(i::Logger::STUB_TAG, args5_code, 5);
@@ skipping 41 matching lines @@
   i::Isolate* isolate = i::Isolate::Current();
   i::HandleScope scope(isolate);
 
   i::Code* frame1_code = CreateCode(&env);
   i::Code* frame2_code = CreateCode(&env);
   i::Code* frame3_code = CreateCode(&env);
 
   CpuProfilesCollection* profiles = new CpuProfilesCollection;
   profiles->StartProfiling("", 1, false);
   ProfileGenerator generator(profiles);
-  ProfilerEventsProcessor processor(&generator);
+  ProfilerEventsProcessor processor(&generator, NULL, 100);
   processor.Start();
   CpuProfiler profiler(isolate, profiles, &generator, &processor);
 
   profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, frame1_code, "bbb");
   profiler.CodeCreateEvent(i::Logger::STUB_TAG, frame2_code, 5);
   profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, frame3_code, "ddd");
 
   EnqueueTickSampleEvent(&processor, frame1_code->instruction_start());
   EnqueueTickSampleEvent(
       &processor,
@@ skipping 48 matching lines @@
   TestSetup test_setup;
   LocalContext env;
   i::Isolate* isolate = i::Isolate::Current();
   i::HandleScope scope(isolate);
 
   i::Code* code = CreateCode(&env);
 
   CpuProfilesCollection* profiles = new CpuProfilesCollection;
   profiles->StartProfiling("", 1, false);
   ProfileGenerator generator(profiles);
-  ProfilerEventsProcessor processor(&generator);
+  ProfilerEventsProcessor processor(&generator, NULL, 100);
   processor.Start();
   CpuProfiler profiler(isolate, profiles, &generator, &processor);
 
   profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, code, "bbb");
 
   i::TickSample* sample = processor.TickSampleEvent();
   sample->pc = code->address();
   sample->tos = 0;
   sample->frames_count = i::TickSample::kMaxFramesCount;
   for (int i = 0; i < sample->frames_count; ++i) {
@@ skipping 1088 matching lines @@
   CHECK_GE(programNode->GetHitCount(), 3);
 
   const v8::CpuProfileNode* idleNode =
       GetChild(root, ProfileGenerator::kIdleEntryName);
   CHECK_EQ(0, idleNode->GetChildrenCount());
   CHECK_GE(idleNode->GetSelfSamplesCount(), 3);
   CHECK_GE(idleNode->GetHitCount(), 3);
 
   cpu_profiler->DeleteAllCpuProfiles();
 }