In CentOS6.5, Nginx loads multiple CPU Cores

How to configure Nginx multi-core CPU and worker_cpu_affinity
1. 2-core CPU, enable 2 processes

Worker_processes 2;
Worker_cpu_affinity 01 10;

01 indicates that the first CPU kernel is enabled, and 10 indicates that the second CPU kernel is enabled.
Worker_cpu_affinity 01 10; indicates that two processes are enabled. The first process corresponds to the first CPU kernel, and the second process corresponds to the second CPU kernel.
2. 2-core CPU, 4 processes enabled

Worker_processes 4;
Worker_cpu_affinity 01 10 01 10;

Four processes are enabled, which correspond to two CPU Cores
3. 4-core CPU, 4 processes

Worker_processes 4;
Worker_cpu_affinity 0001 0010 0100 1000;
0001 indicates that the first CPU kernel is enabled, 0010 indicates that the second CPU kernel is enabled, and so on.
4. 4-core CPU, enable 2 processes

Worker_processes 2;
Worker_cpu_affinity 0101 1010;
0101 indicates that the first and third kernels are enabled, and 1010 indicates that the second and fourth kernels are enabled.
Two processes correspond to four kernels.
The worker_cpu_affinity configuration is written in/etc/nginx. conf.
The value of 2 cores is 01, and the value of 4 cores is 00000001. The number of cores is several digits. 1 indicates that the kernel is enabled, and 0 indicates that the kernel is disabled.

5. 8-core CPU and 8 Processes

Worker_processes 8;
Worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000;
0001 indicates that the first CPU kernel is enabled, 0010 indicates that the second CPU kernel is enabled, and so on.

Worker_processes can be enabled at most 8. Performance Improvement of more than 8 processes will not be improved, and the stability will be reduced. Therefore, 8 processes are sufficient.
Restart nginx and run/etc/init. d/nginx restart.
Test whether nginx is useful to multiple CPU cores and execute the AB .exe-c 1000-n 1000 http://www.domain.com/index.php on another machine
AB .exe is a performance testing tool installed with apache. It can simulate concurrent requests from multiple clients.
Run the top command on the server and press 1 to view the CPU kernel. If the utilization of multiple CPU cores is similar, nginx has successfully used multi-core CPUs.
After the test, the CPU kernel load should be reduced at the same time.