g1 VM_Thread

VM Thread 线程

声明

1. 声明位于 vmThread.cpp 中

VMThread::VMThread() : NamedThread() {
    set_name("VM Thread");
}
void VMThread::create() {
    _vm_thread = new VMThread();
}

2. 创建和启动是在 thread.cpp 中

jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
    VMThread::create();
    Thread* vmthread = VMThread::vm_thread();
    os::create_thread(vmthread, os::vm_thread);
    os::start_thread(vmthread);
}

run 方法

void VMThread::run() {
    this->initialize_named_thread();
    this->loop();
}
void VMThread::loop() {    
    while(true) {
        // 代码省略
    }
}

任务列表

g1 有关的任务

任务名称	位置	备注	解析
VM_G1CollectForAllocation	G1CollectedHeap::collect
VM_G1CollectFull	G1CollectedHeap::collect
VM_G1CollectForAllocation	G1CollectedHeap::do_collection_pause
VM_CGC_Operation::CMRemark	G1ConcurrentMarkThread::run_service
VM_CGC_Operation::CMCleanup	G1ConcurrentMarkThread::run_service
VM_G1SendHeapRegionInfoEvents	G1HeapRegionEventSender::send_events