We do not set limits on CPU cycles. If your VPS has less than 2GB of RAM, then you will have access to one entire CPU core; two cores for 2GB and up, three cores for 8GB and up, and four cores for 16G and up. If you need more capacity, additional cores can be purchased for Linux virtual servers.
Because CPU use fluctuates widely and 8 to 24 fast CPU cores are available on each machine, it never happens that a VPS is unable to use its designated cores. We will however be warned and take immediate action if this should ever be in danger of occurring. We have never needed to take any such actions.