我正在使用 gperftools 来分析我的程序并尝试对其进行优化。用 gperftools 运行我的程序后，我得到了这个：
Total: 2902 samples
2765 95.3% 95.3% 2765 95.3% 0xb76e7cb0
93 3.2% 98.5% 93 3.2% 0xb76e7cb1
10 0.3% 98.8% 2643 91.1% CTestSession::SendMsg
7 0.2% 99.1% 7 0.2% __pthread_enable_asynccancel
6 0.2% 99.3% 2650 91.3% CTestSessionFactory::BroadCast
6 0.2% 99.5% 6 0.2% __pthread_disable_asynccancel
2 0.1% 99.6% 2 0.1% __gthread_active_p
1 0.0% 99.6% 1 0.0% 0xb76e7ca5
1 0.0% 99.6% 8 0.3% CMutexLock::UnLock
1 0.0% 99.7% 6 0.2% CSDConnectionLinux::DoRecv
1 0.0% 99.7% 1 0.0% CSDConnectionLinux::Send
1 0.0% 99.7% 2651 91.4% CTestSession::OnRecv
1 0.0% 99.8% 1 0.0% __GI___libc_malloc
1 0.0% 99.8% 1 0.0% __GI___pthread_mutex_lock
1 0.0% 99.8% 1 0.0% __libc_send
1 0.0% 99.9% 1 0.0% __memcpy_ssse3_rep
1 0.0% 99.9% 1 0.0% _int_free
1 0.0% 99.9% 2662 91.7% main
1 0.0% 100.0% 1 0.0% std::deque::_M_pop_front_aux
1 0.0% 100.0% 1 0.0% std::vector::operator[]
0 0.0% 100.0% 1 0.0% 0x14ac9604
0 0.0% 100.0% 1 0.0% 0x14ac960b
0 0.0% 100.0% 1 0.0% 0x14ac9610
0 0.0% 100.0% 1 0.0% 0x14ac9617
0 0.0% 100.0% 2 0.1% 0x14ac961a
0 0.0% 100.0% 2 0.1% CBufManager::GetFreeBuf
0 0.0% 100.0% 2 0.1% CBufManager::GiveBackBuf
0 0.0% 100.0% 3 0.1% CEpoll::DoAccept
0 0.0% 100.0% 35 1.2% CEpoll::DoRecv
0 0.0% 100.0% 38 1.3% CEpoll::worker_thread
0 0.0% 100.0% 4 0.1% CMutexLock::Lock
0 0.0% 100.0% 5 0.2% CSDConnectionLinux::ParsePackets
0 0.0% 100.0% 3 0.1% CSDListenerLinux::Accept
0 0.0% 100.0% 1 0.0% CSDNet::AddEventOnRecv
0 0.0% 100.0% 2661 91.7% CSDNet::Run
0 0.0% 100.0% 2653 91.4% CSDQueueEventOnRecv::Work
0 0.0% 100.0% 4 0.1% ISDConnectionCommon::ParsePacket
0 0.0% 100.0% 40 1.4% __clone
0 0.0% 100.0% 2 0.1% __gthread_mutex_lock
0 0.0% 100.0% 2828 97.5% __libc_start_main
0 0.0% 100.0% 1 0.0% _init
0 0.0% 100.0% 40 1.4% start_thread
0 0.0% 100.0% 1 0.0% std::deque::pop_front
0 0.0% 100.0% 4 0.1% std::mutex::lock
0 0.0% 100.0% 7 0.2% std::mutex::unlock
0 0.0% 100.0% 1 0.0% std::queue::pop
我很好奇第一行中的“0xb76e7cb0”是什么意思？不是函数吗？为什么 gperftools 使用该地址？该程序实际上是一个服务器，在“SendMsg”中它唯一做的就是调用发送函数（通过套接字）。