nginx run on centos 7.1

Does anybody run nginx on centos 7.1?

%cpu is much higher than on other systems?

I run nginx-1.8.0 and nginx-1.2.7 on centos7.1, I find %cpu nginx-1.2.7 on centos 5.4 is much higher on centos7.1.

Does anybody meet the problem?

Any advice.

Thanks.