example of web server uses only single thread, show examples that uses all thread in multi threaded of...

show examples that uses all thread in multi threaded of:
1. one process per cpu core (like nginx)
2. 1 process used by all cpu cores (pls advice on the maximum cores recommended for use with pingora, in golang, optimum cores are 16-24 while 192 cores suffer performance degradation which is the same as using 24 cores actually)