[Question]: gnet engine is stopping with error: kevent add|clear:function not implemented

[dul666888]

Actions I've taken before I'm here

• I've thoroughly read the documentations about this problem but still have no answer.
• I've searched the Github Issues/Discussions but didn't find any similar problems that have been solved.
• I've searched the internet for this problem but didn't find anything helpful.

Questions with details

gnet跑一个基于tcp的socket服务端.目标系统freebsd11.2
实现了onboot,onopen,onclose,onshutdown,ontraffic 接口.
启动时提示错误:
[gnet] 2024-03-19T20:45:28.808010602+08:00 ERROR v2@v2.3.5/engine_unix.go:282 gnet engine is stopping with error: kevent add|clear: function not implemented
github.com/panjf2000/gnet/v2.run
/root/go/pkg/mod/github.com/panjf2000/gnet/v2@v2.3.5/engine_unix.go:282
github.com/panjf2000/gnet/v2.Run
/root/go/pkg/mod/github.com/panjf2000/gnet/v2@v2.3.5/gnet.go:495
mt_server/Client.InitMtServer
/usr/zz/server1/game1/Client/Server.go:71

Code snippets (optional)

package Client

import (
	"context"
	"fmt"
	"mt_server/Common"
	"mt_server/Game"
	"mt_server/Logs"
	"sync/atomic"
	"time"

	"github.com/panjf2000/gnet/v2"
)

var (
	MtServerListener *MTServer
)

type MTServer struct {
	gnet.BuiltinEventEngine
	eng          gnet.Engine
	protoAddr    string
	multicore    bool
	connected    int32
	disconnected int32
}

func (s *MTServer) OnBoot(eng gnet.Engine) (action gnet.Action) {
	Logs.InfoF("BINDING PORT [%d]", Game.ConfigObj.Port)
	s.eng = eng
	return
}

func (s *MTServer) OnOpen(c gnet.Conn) (out []byte, action gnet.Action) {
	atomic.AddInt32(&s.connected, 1)
	atomic.AddInt32(&Common.SocketConnectPlayer, 1)
	Game.InitDescriptor(c)
	return
}

func (s *MTServer) OnClose(c gnet.Conn, err error) (action gnet.Action) {
	atomic.AddInt32(&s.disconnected, 1)
	atomic.AddInt32(&s.connected, -1)
	atomic.AddInt32(&Common.SocketConnectPlayer, -1)
	c.Flush()
	SocketClose(c)
	return
}

func (s *MTServer) OnTraffic(c gnet.Conn) (action gnet.Action) {
	l := c.InboundBuffered()
	data, _ := c.Peek(l)
	RecvBroadcast <- Common.MsgID{Conn: c, Packet: data}
	return
}

func (s *MTServer) OnShutdown(eng gnet.Engine) {
	Game.CloseAllDescriptor()
}

func InitMtServer() {
	multicore := true
	MtServerListener = &MTServer{
		protoAddr: fmt.Sprintf("tcp://:%d", Game.ConfigObj.Port),
		multicore: multicore,
	}

	err := gnet.Run(MtServerListener, MtServerListener.protoAddr, gnet.WithMulticore(multicore))
	if err != nil {
		Logs.ErrorF("server exits with error: %v", err)
	}
}

func ListenClose() {
	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
	gnet.Stop(ctx, MtServerListener.protoAddr)
	cancel()
}

[panjf2000]

怎么还是用的这个模板。。。算了，看起来相关的信息应该够了。

[panjf2000]

看起来像是你的 freebsd 系统没有 kqueue, 但是你的系统版本又是 11.2，按道理应该是有的。你的 freebsd 是安装在物理机还是虚拟机上的？

运行一下 man 2 kevent 命令看看你的系统里有没有这个系统调用。

[dul666888]

虚拟机里的。
运行man 2 kevent 命令截图：

[panjf2000]

你是在服务器上进行虚拟化还是桌面电脑的虚拟机软件？这个问题比较奇怪，可能是虚拟机的问题，我以前在 freebsd 云服务器上测试过是没问题的。

[dul666888]

在我个人电脑上运行的虚拟机VMware® Workstation 17.0.0 build-20800274
freebsd装的11.2 amd64版本，go是用的1.19.1