比较epoll与iocp的吞吐能力比较

寒月望山

5613人浏览 · 2017-02-04 16:15:56

寒月望山 · 2017-02-04 16:15:56 发布

环境：机器xp系统 CPUi5-3470 + 4G内存, 在此基础上安装的虚拟机vmware10（ubuntu）
epoll: 虚拟机+ubuntu14，网卡显示为1000M，单线程
client: 单线程

iocp：xp，网卡显示为100M,多线程(没有测试其线程池模式)
相同的网络协议dataLen(int)+data(N字节)。
client: 多线程

接收到的数据不处理，保确定每次发送的数据头长度是否被覆盖，程序实现的思路基本差不多，只测试两个模式的吞吐能力。
测试结果：
iocp:
server                                    client
接近400MB/s, CPU:18%        CPU:80%
epoll:
1000MB/s,     CPU:2%           CPU:2%（800KB/次）
20MB/s,          CPU:1%           CPU:1%（20KB/次）

多个Client时，epoll接收数据成倍增加。

也许操作系统、网卡速率不同，差异很多，感觉做服务器，Linux有天生的优势.
当每次发的数据包比较小时，Server端的接收速率上不去，大概在20MB/s多点.

iocp server:
// IOCP_TCPIP_Socket_Server.cpp

#include
#include
#include
#include

using namespace std;

#pragma comment(lib, "Ws2_32.lib")      // Socket编程需用的动态链接库
#pragma comment(lib, "Kernel32.lib")    // IOCP需要用到的动态链接库

/**
* 结构体名称：PER_IO_DATA
* 结构体功能：重叠I/O需要用到的结构体，临时记录IO数据
**/

#define BUFFSIZE 1024*4
#define SENDSIZE 1024*1

typedef struct{
double nDataTotal;
float fTotalLast;
int  nActCount;
int  nLastLen;
int  TotalSize;
int  ReadSize;
DWORD tBegin;
DWORD tEnd;
DWORD tDiff;
}RecvInfo;

typedef struct
{
    OVERLAPPED overlapped;
    WSABUF databuff;
    char buffer[ BUFFSIZE ];
char *pHeader;
    int TotalSize;
int ReadSize;
    int operationType;
}PER_IO_OPERATEION_DATA, *LPPER_IO_OPERATION_DATA, *LPPER_IO_DATA, PER_IO_DATA;

/**
* 结构体名称：PER_HANDLE_DATA
* 结构体存储：记录单个套接字的数据，包括了套接字的变量及套接字的对应的客户端的地址。
* 结构体作用：当服务器连接上客户端时，信息存储到该结构体中，知道客户端的地址以便于回访。
**/
typedef struct
{
    SOCKET socket;
    SOCKADDR_STORAGE ClientAddr;
}PER_HANDLE_DATA, *LPPER_HANDLE_DATA;

char *g_pRecvData;
// 定义全局变量
const int DefaultPort = 20000;
vector < PER_HANDLE_DATA* > clientGroup;      // 记录客户端的向量组

HANDLE hMutex = CreateMutex(NULL, FALSE, NULL);
DWORD WINAPI ServerWorkThread(LPVOID CompletionPortID);
DWORD WINAPI ServerSendThread(LPVOID IpParam);
void WINAPI IOWorkDummy(DWORD ExeCode, DWORD IOSize, LPOVERLAPPED pOVL);

RecvInfo g_info;
// 开始主函数
int main()
{
// 加载socket动态链接库
    WORD wVersionRequested = MAKEWORD(2, 2); // 请求2.2版本的WinSock库
    WSADATA wsaData;    // 接收Windows Socket的结构信息
    DWORD err = WSAStartup(wVersionRequested, &wsaData);

    if (0 != err){ // 检查套接字库是否申请成功
        cerr << "Request Windows Socket Library Error!\n";
        system("pause");
        return -1;
    }
    if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2){// 检查是否申请了所需版本的套接字库
        WSACleanup();
        cerr << "Request Windows Socket Version 2.2 Error!\n";
        system("pause");
        return -1;
    }

// 创建IOCP的内核对象
    /**
     * 需要用到的函数的原型：
     * HANDLE WINAPI CreateIoCompletionPort(
     *    __in   HANDLE FileHandle,     // 已经打开的文件句柄或者空句柄，一般是客户端的句柄
     *    __in   HANDLE ExistingCompletionPort, // 已经存在的IOCP句柄
     *    __in   ULONG_PTR CompletionKey,   // 完成键，包含了指定I/O完成包的指定文件
     *    __in   DWORD NumberOfConcurrentThreads // 真正并发同时执行最大线程数，一般推介是CPU核心数*2
     * );
     **/
    HANDLE completionPort = CreateIoCompletionPort( INVALID_HANDLE_VALUE, NULL, 0, 0);
    if (NULL == completionPort){    // 创建IO内核对象失败
        cerr << "CreateIoCompletionPort failed. Error:" << GetLastError() << endl;
        system("pause");
        return -1;
    }

// 创建IOCP线程--线程里面创建线程池

    // 确定处理器的核心数量
    SYSTEM_INFO mySysInfo;
    GetSystemInfo(&mySysInfo);

    // 基于处理器的核心数量创建线程
    //for(DWORD i = 0; i < (mySysInfo.dwNumberOfProcessors * 2); ++i)
for(DWORD i = 0; i < 4; ++i)
{
        // 创建服务器工作器线程，并将完成端口传递到该线程
        HANDLE ThreadHandle = CreateThread(NULL, 0, ServerWorkThread, completionPort, 0, NULL);
        if(NULL == ThreadHandle){
            cerr << "Create Thread Handle failed. Error:" << GetLastError() << endl;
        system("pause");
            return -1;
        }
        CloseHandle(ThreadHandle);
   }

// 建立流式套接字
    SOCKET srvSocket = socket(AF_INET, SOCK_STREAM, 0);

// 绑定SOCKET到本机
    SOCKADDR_IN srvAddr;
    srvAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    srvAddr.sin_family = AF_INET;
    srvAddr.sin_port = htons(DefaultPort);
    int bindResult = bind(srvSocket, (SOCKADDR*)&srvAddr, sizeof(SOCKADDR));
    if(SOCKET_ERROR == bindResult){
        cerr << "Bind failed. Error:" << GetLastError() << endl;
        system("pause");
        return -1;
    }

// 将SOCKET设置为监听模式
    int listenResult = listen(srvSocket, 100);
    if(SOCKET_ERROR == listenResult){
        cerr << "Listen failed. Error: " << GetLastError() << endl;
        system("pause");
        return -1;
    }

// 开始处理IO数据
    cout << "本服务器已准备就绪，正在等待客户端的接入...\n";
memset(&g_info, 0, sizeof(RecvInfo));

int rcv_size = 1024*1024*20;    /* 接收缓冲区大小为8K */
int optlen = sizeof(rcv_size);
err = setsockopt(srvSocket,SOL_SOCKET,SO_RCVBUF, (char *)&rcv_size, optlen);
if(err<0){
  printf("设置接收缓冲区大小错误\n");
}else{
  printf("设置接收缓冲区大小OK\n");
}

g_pRecvData = new char[1024*1024*500];
if (g_pRecvData==NULL){
  printf("new g_pRecvData false\n");
}
    // 创建用于发送数据的线程
    HANDLE sendThread = CreateThread(NULL, 0, ServerSendThread, 0, 0, NULL);
/*if (0 == BindIoCompletionCallback((HANDLE)srvSocket, IOWorkDummy, 0))
{
  printf("BindIoCompletionCallback is failed. Error code = %d", GetLastError());
}*/

int nPackIndex = 0;
    while(true){
        PER_HANDLE_DATA * PerHandleData = NULL;
        SOCKADDR_IN saRemote;
        int RemoteLen;
        SOCKET acceptSocket;

        // 接收连接，并分配完成端，这儿可以用AcceptEx()
        RemoteLen = sizeof(saRemote);
        acceptSocket = accept(srvSocket, (SOCKADDR*)&saRemote, &RemoteLen);
        if(SOCKET_ERROR == acceptSocket){   // 接收客户端失败
            cerr << "Accept Socket Error: " << GetLastError() << endl;
            system("pause");
            return -1;
        }

        // 创建用来和套接字关联的单句柄数据信息结构
        PerHandleData = (LPPER_HANDLE_DATA)GlobalAlloc(GPTR, sizeof(PER_HANDLE_DATA)); // 在堆中为这个PerHandleData申请指定大小的内存
        PerHandleData -> socket = acceptSocket;
        memcpy (&PerHandleData -> ClientAddr, &saRemote, RemoteLen);
        clientGroup.push_back(PerHandleData);       // 将单个客户端数据指针放到客户端组中

        // 将接受套接字和完成端口关联
        CreateIoCompletionPort((HANDLE)(PerHandleData -> socket), completionPort, (DWORD)PerHandleData, 0);


        // 开始在接受套接字上处理I/O使用重叠I/O机制
        // 在新建的套接字上投递一个或多个异步
        // WSARecv或WSASend请求，这些I/O请求完成后，工作者线程会为I/O请求提供服务
        // 单I/O操作数据(I/O重叠)
        LPPER_IO_OPERATION_DATA PerIoData = NULL;
        PerIoData = (LPPER_IO_OPERATION_DATA)GlobalAlloc(GPTR, sizeof(PER_IO_OPERATEION_DATA));
        ZeroMemory(&(PerIoData->overlapped), sizeof(OVERLAPPED));
        PerIoData->databuff.len = BUFFSIZE;
        PerIoData->databuff.buf = PerIoData->buffer;
  PerIoData->pHeader = g_pRecvData + nPackIndex*1024*100;
        PerIoData->operationType = 0;    // read
  PerIoData->TotalSize = 0;
  PerIoData->ReadSize = 0;
  nPackIndex++;

        DWORD RecvBytes;
        DWORD Flags = 0;
        WSARecv(PerHandleData->socket, &(PerIoData->databuff), 1, &RecvBytes, &Flags, &(PerIoData->overlapped), NULL);
    }

    system("pause");
free(g_pRecvData);
    return 0;
}

// 开始服务工作线程函数
DWORD WINAPI ServerWorkThread(LPVOID IpParam)
{
    HANDLE CompletionPort = (HANDLE)IpParam;
    DWORD BytesTransferred;
    LPOVERLAPPED IpOverlapped;
    LPPER_HANDLE_DATA PerHandleData = NULL;
    LPPER_IO_DATA PerIoData = NULL;
    DWORD RecvBytes;
    DWORD Flags = 0;
    BOOL bRet = false;

g_info.tBegin = GetTickCount();
    while(true){
        bRet = GetQueuedCompletionStatus(CompletionPort, &BytesTransferred, (PULONG_PTR)&PerHandleData, (LPOVERLAPPED*)&IpOverlapped, INFINITE);
        if(bRet == 0){
            cerr << "GetQueuedCompletionStatus Error: " << GetLastError() << endl;
            return -1;
        }
        PerIoData = (LPPER_IO_DATA)CONTAINING_RECORD(IpOverlapped, PER_IO_DATA, overlapped);

        // 检查在套接字上是否有错误发生
        if(0 == BytesTransferred){
            closesocket(PerHandleData->socket);
            GlobalFree(PerHandleData);
            GlobalFree(PerIoData);
            continue;
        }

        // 开始数据处理，接收来自客户端的数据
  //cout << "A Client says: " << PerIoData->databuff.len << endl;
        if (PerIoData->TotalSize == 0){
   // header1
   PerIoData->TotalSize = *((int *)PerIoData->databuff.buf);
   if (PerIoData->TotalSize>1024*2000 || PerIoData->TotalSize<0){
    //fwrite( g_pBuf, 1, g_lastLen, g_hFile );
    //sprintf(g_pBuf, "Error TotalSize2 = %d\n", PerIoData->TotalSize);
    //fwrite( g_pBuf, 1, strlen(g_pBuf), g_hFile );
    //fflush( g_hFile );
    printf("Error TotalSize2 = %d\n", PerIoData->TotalSize);
    //break;
   }

   PerIoData->ReadSize = BytesTransferred - 4;
  }else{
   PerIoData->ReadSize += BytesTransferred;
  }
  g_info.nDataTotal += BytesTransferred;

  //PerIoData->buff[len] = '\0';
  if (PerIoData->TotalSize <= PerIoData->ReadSize && PerIoData->TotalSize>100){
   g_info.TotalSize=PerIoData->TotalSize;
   g_info.ReadSize=PerIoData->ReadSize;
   PerIoData->TotalSize = PerIoData->ReadSize = 0;
   //printf("full .... ");
  }

  if (g_info.nActCount++>50000){
   //if (((int)nDataTotal) % (BUFFSIZE*200) == 0){
   g_info.nActCount = 0;
   g_info.tEnd = GetTickCount();
   g_info.tDiff = g_info.tEnd - g_info.tBegin;

   float fTotal = (float)g_info.nDataTotal/(1024*1024);
   float nDiffTime = (float)g_info.tDiff/1000;
   g_info.tBegin = g_info.tEnd;
   printf("tm=%5.3f, v=%5.3f, Total=%5.2f, UT=%d, UR=%d \n",
     nDiffTime, (fTotal-g_info.fTotalLast)/nDiffTime, fTotal, g_info.TotalSize, g_info.ReadSize);
   g_info.fTotalLast = fTotal;
  }

        // 为下一个重叠调用建立单I/O操作数据
        ZeroMemory(&(PerIoData->overlapped), sizeof(OVERLAPPED)); // 清空内存
  if (PerIoData->TotalSize==0){
   PerIoData->databuff.len = BUFFSIZE;
   PerIoData->databuff.buf = PerIoData->buffer;
   PerIoData->operationType = 0;    // read
  }else{
   memcpy(PerIoData->pHeader, PerIoData->databuff.buf, PerIoData->ReadSize);
   PerIoData->databuff.len = PerIoData->TotalSize-PerIoData->ReadSize;
   PerIoData->databuff.buf = PerIoData->pHeader+PerIoData->ReadSize;
   PerIoData->operationType = 0;    // read
  }

        WSARecv(PerHandleData->socket, &(PerIoData->databuff), 1, &RecvBytes, &Flags, &(PerIoData->overlapped), NULL);
    }

    return 0;
}

void WINAPI IOWorkDummy(DWORD ExeCode, DWORD BytesTransferred, LPOVERLAPPED pOVL)
{
LPOVERLAPPED IpOverlapped;
LPPER_HANDLE_DATA PerHandleData = NULL;
LPPER_IO_DATA PerIoData = NULL;
DWORD RecvBytes;
DWORD Flags = 0;
BOOL bRet = false;

g_info.tBegin = GetTickCount();
while(true){
PerIoData = (LPPER_IO_DATA)(pOVL);

  // 检查在套接字上是否有错误发生
  if(0 == BytesTransferred){
   closesocket(PerHandleData->socket);
   GlobalFree(PerHandleData);
   GlobalFree(PerIoData);
   continue;
  }

  // 开始数据处理，接收来自客户端的数据
  //cout << "A Client says: " << PerIoData->databuff.len << endl;
  if (PerIoData->TotalSize == 0){
   // header1
   PerIoData->TotalSize = *((int *)PerIoData->databuff.buf);
   if (PerIoData->TotalSize>1024*2000 || PerIoData->TotalSize<0){
    //fwrite( g_pBuf, 1, g_lastLen, g_hFile );
    //sprintf(g_pBuf, "Error TotalSize2 = %d\n", PerIoData->TotalSize);
    //fwrite( g_pBuf, 1, strlen(g_pBuf), g_hFile );
    //fflush( g_hFile );
    printf("Error TotalSize2 = %d\n", PerIoData->TotalSize);
    //break;
   }

   PerIoData->ReadSize = BytesTransferred - 4;
  }else{
   PerIoData->ReadSize += BytesTransferred;
  }
  g_info.nDataTotal += BytesTransferred;

  //PerIoData->buff[len] = '\0';
  if (PerIoData->TotalSize <= PerIoData->ReadSize && PerIoData->TotalSize>100){
   g_info.TotalSize=PerIoData->TotalSize;
   g_info.ReadSize=PerIoData->ReadSize;
   PerIoData->TotalSize = PerIoData->ReadSize = 0;
   //printf("full .... ");
  }

  if (g_info.nActCount++>50000){
   //if (((int)nDataTotal) % (BUFFSIZE*200) == 0){
   g_info.nActCount = 0;
   g_info.tEnd = GetTickCount();
   g_info.tDiff = g_info.tEnd - g_info.tBegin;

  // 为下一个重叠调用建立单I/O操作数据
  ZeroMemory(&(PerIoData->overlapped), sizeof(OVERLAPPED)); // 清空内存
  if (PerIoData->TotalSize==0){
   PerIoData->databuff.len = BUFFSIZE;
   PerIoData->databuff.buf = PerIoData->buffer;
   PerIoData->operationType = 0;    // read
  }else{
   memcpy(PerIoData->pHeader, PerIoData->databuff.buf, PerIoData->ReadSize);
   PerIoData->databuff.len = PerIoData->TotalSize-PerIoData->ReadSize;
   PerIoData->databuff.buf = PerIoData->pHeader+PerIoData->ReadSize;
   PerIoData->operationType = 0;    // read
  }

  WSARecv(PerHandleData->socket, &(PerIoData->databuff), 1, &RecvBytes, &Flags, &(PerIoData->overlapped), NULL);
}
} // IOWorkerDummy()

// 发送信息的线程执行函数
DWORD WINAPI ServerSendThread(LPVOID IpParam)
{
    while(1){
        char talk[200];
        gets(talk);
        int len;
        for (len = 0; talk[len] != '\0'; ++len){
            // 找出这个字符组的长度
        }
        talk[len] = '\n';
        talk[++len] = '\0';
        printf("I Say:");
        cout << talk;
        WaitForSingleObject(hMutex,INFINITE);
        for(int i = 0; i < clientGroup.size(); ++i){
            send(clientGroup[i]->socket, talk, 200, 0); // 发送信息
        }
        ReleaseMutex(hMutex);
    }
    return 0;
}