ngx_custom_worker_module can set the number of processes with any factor of worker_processes auto.
- the number of worker processes is 4 if the number of cpu threads is 4.
worker_processes auto;- the number of worker processes is 12 if the number of cpu threads is 4.
worker_processes auto;
worker_processes_factor 3;- use nginx configure option
./configure --add-module=/path/to/ngx_custom_worker_module