nginx启用reuseport

这两天做一个http测试，客户端使用一台8核16G的虚机，服务器使用8台8核16G的虚机，服务器挂在负载均衡后端。
客户端使用wrk打流
服务器开启nginx，返回 200 ok
测试结果发现服务器nginx的cpu利用率恨不均匀，后来查到有reuseport这个参数，放在listen后面

listen 80 default_server reuseport;

增了了试验了下，果然好用。
下图是对比，上面是不开启reuseport，可以看到cpu利用率在20-40%，而开启了，cpu利用率只有12%了。
http请求

https请求

我的测试机器安装

[root@vm100-0-11-135 ~]# rpm -qa|grep nginx
nginx-mod-stream-1.16.1-1.el7.x86_64
nginx-1.16.1-1.el7.x86_64
nginx-filesystem-1.16.1-1.el7.noarch
nginx-mod-http-perl-1.16.1-1.el7.x86_64
nginx-mod-http-xslt-filter-1.16.1-1.el7.x86_64
nginx-mod-http-image-filter-1.16.1-1.el7.x86_64
nginx-mod-mail-1.16.1-1.el7.x86_64
nginx-all-modules-1.16.1-1.el7.noarch
[root@vm100-0-11-135 ~]# nginx -V
nginx version: nginx/1.16.1
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-stream_ssl_preread_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-http_auth_request_module --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' --with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'