[FEATURE] tcp receiver distribution unbalanced

[XNXSIL]

Running environment.
version: opensips 3.4.7 (x86_64/linux)
flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, HP_MALLOC, DBG_MALLOC, FAST_LOCK-ADAPTIVE_WAIT
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535
poll method support: poll, epoll, sigio_rt, select.
git revision: 79ebc9d
main.c compiled on with gcc 10

Describe the problem

After upgrading from 3.2 to 3.4, the tcp receiver distribution becomes unbalanced. proc_load will have spike
3.2 version

3.4 version

Describe alternatives you've considered

There may be a problem with the following commit
5a6399b

[XNXSIL]

I made a mistake. There is no big problem with the allocation logic of tcp_receiver. However, the load calculation uses the pt_get_1m_proc_load function, which is not accurate enough and can easily cause CPU spikes. This problem can be solved by changing to pt_get_pt_proc_load

Stress Testing

pt_get_1m_proc_load

pt_get_rt_proc_load