ngx_custom_worker_module can set the number of processes with any factor or spare 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;

• the number of worker processes is 2 if the number of cpu threads is 4.

worker_processes        auto;
worker_processes_spare 2;

The worker_processes_factor is applied before the worker_processes_spare.

• the number of worker processes is 10 if the number of cpu threads is 4.

worker_processes        auto;
worker_processes_factor 3;
worker_processes_spare 2;

• the number of worker processes is 10 if the number of cpu threads is 4.

worker_processes        auto;
worker_processes_spare 2;
worker_processes_factor 3;

• use nginx configure option

./configure --add-module=/path/to/ngx_custom_worker_module