how can i assign multiple cores to every process in my os

Question

I have VM which builds on cantos 7,so I want to make every process in the system to use more than one core in parallel I have a 24 CPU on my server, but every process can't use more than 1 core, after that the CPU is always 100%. I need to make more utilization of CPU with other cores.

I need to make a huge process to use multipe cores instead of one core? How can I do such a thing like that?