1, Server hardware:

2, Server side:

 $server = new \swoole_websocket_server("0.0.0.0", 9556);

 $options = [
 'max_connection' => 150000, // Maximum number of links
 'worker_num' => 6, // Number of worker s
 // swFactoryProcess_finish: send failed, session#1 output buffer has been overflowed.
 // When the server has a large number of TCP connections, in the worst case, it will occupy serv - > Max connection * buffer Ou output Ou size bytes of memory
 'socket_buffer_size' => 512 * 1024 * 1024, // M must be a number to set the maximum amount of memory allowed for client connections
 // Heartbeat detection
 'heartbeat_idle_time' => 30,
 'heartbeat_check_interval' => 10,
// 'buffer_output_size' = > 2 / / used to set the maximum single send length M
 ];

 $server->set($options);

 $server->on('open', function ($server, $req) {
 error_log(date('Y-m-d H:i:s') . 'open connection count : ' . count($server->connections) . "\n", 3, './result.log');
 });

 $server->on('message', function ($server, $frame) {
 $count = count($server->connections);
 error_log(date('Y-m-d H:i:s') . "Shared by current server " . $count . " A connection\n", 3, './result.log');
 $message = json_decode($frame->data, true);
 if (isset($message['messageType'])) {
 switch ($message['messageType']) {
 case 'ping':
 error_log(date('Y-m-d H:i:s') . "Shared by current server " . $count . " A connection\n", 3, './result.log');
 $testFd = file_get_contents('./fd.log');
 for ($index = 1; $index <= $count; $index++) {
 $server->push(
 $testFd,
 json_encode(
 [
 'messageType' => 'pong',
 'connection_num' => $count,
 'index' => $index,
 'time' => microtime(true),
 'data' => '{"messageType": "join_req", "data": {"roomId": "124","userId": numMax,"nickName": "nickName","avatar": "avatar","message": "message","role":0,"level":5,"masterUserId":111,"masterNickNam e":"masterNickName","masterAvatar":"masterAvatar","masterLevel":9}}'
 ]
 )
 );
 }
 break;
 case 'opon':
 file_put_contents('./fd.log', $frame->fd);
 break;
 default:
 break;

 }
 }
 if (file_exists('./fd.log')) {
 $fd = file_get_contents('./fd.log');
 $server->push(
 intval($fd),
 json_encode(
 [
 'messageType' => 'Concurrent:' . $count . ' Client to specify a single client ' . $fd . ' Send message',
 'connection_num' => $count,
 'fd' => $frame->fd,
 'time' => microtime(true),
 'data' => '{"messageType": "join_req", "data": {"roomId": "124","userId": numMax,"nickName": "nickName","avatar": "avatar","message": "message","role":0,"level":5,"masterUserId":111,"masterNickNam e":"masterNickName","masterAvatar":"masterAvatar","masterLevel":9}}'
 ]
 )
 );
 }
 });

 $server->on('close', function ($server, $fd) {
 if (file_exists('./fd.log')) {
 $testFd = file_get_contents('./fd.log');
 $server->push(
 intval($testFd),
 json_encode(
 [
 'messageType' => 'pong',
 'connection_num' => count($server->connections),
 'fdClose' => $fd,
 'time' => microtime(true),
 'data' => '{"messageType": "join_req", "data": {"roomId": "124","userId": numMax,"nickName": "nickName","avatar": "avatar","message": "message","role":0,"level":5,"masterUserId":111,"masterNickNam e":"masterNickName","masterAvatar":"masterAvatar","masterLevel":9}}'
 ]
 )
 );
 if ($fd == $testFd) {
 unlink('./fd.log');
 }
 }
 error_log(
 date('Y-m-d H:i:s') . "Current server close Client, now shared " . count($server->connections) . " A connection\n",
 3,
 './result.log'
 );
 });

 $server->start();

3, Client:

Modify the following file: vim /etc/sysctl.conf

net.ipv6.conf.all.disable_ipv6 = 1

net.ipv6.conf.default.disable_ipv6 = 1

net.ipv6.conf.lo.disable_ipv6 = 1

 

vm.swappiness = 0

net.ipv4.neigh.default.gc_stale_time=120

net.ipv4.conf.all.rp_filter=0

net.ipv4.conf.default.rp_filter=0

net.ipv4.conf.default.arp_announce = 2

net.ipv4.conf.lo.arp_announce=2

net.ipv4.conf.all.arp_announce=2

#net.ipv4.tcp_max_tw_buckets = 5000

net.ipv4.tcp_syncookies = 1

net.ipv4.tcp_max_syn_backlog = 1024

net.ipv4.tcp_synack_retries = 2

kernel.sysrq = 1

#optimization

net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 10000 65535
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_keepalive_intvl = 10
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_retries2=3
net.ipv4.tcp_orphan_retries=2

//The terminal takes effect immediately: sysctl -p

Configuration and installation of pressure measuring tools:

https://www.cnblogs.com/ycyzharry/p/5614459.html

vim generator.js

module.exports = {
    beforeConnect : function(client) {
    },
 onConnect : function(client, done) {

  client.write({"messageType": "join_req"});

   done(); // It is used to close the client process after the link is suspended; if the client needs to suspend the process and keep the long link, the method in the closure function can be annotated
 },
 sendMessage : function(client, done) {

  client.write({"messageType": "join_req"});

  done();
 },

 options : {
    }
};

4, Server kernel optimization:

vim  /etc/security/limits.conf

* soft nofile 102400

* hard nofile 102400

Note: to modify this file, you need to restart the system to take effect

5, Testing

Test statement:
websocket-bench -a 40000 -c 40000 -w 8 -t primus -p websockets ws://192.168.1.2:9556 -g generator.js -o result.log