C语言 如何测量 beaglebone black 上的 TCP/IP 吞吐量

Question

我正在使用beaglebone black。操作系统是Debian GNU/Linux 7.7。我正在使用C语言通过TCP/IP运行服务器和客户端。

这是我用于服务器的代码：

/* A simple server in the internet domain using TCP
   The port number is passed as an argument */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h> 
#include <sys/socket.h>
#include <netinet/in.h>
void error(const char *msg)
{
    perror(msg);
    exit(1);
}
int main(int argc, char *argv[])
{
     int sockfd, newsockfd, portno;
     socklen_t clilen;
     char buffer[256];
     struct sockaddr_in serv_addr, cli_addr;
     int n;
     if (argc < 2) {
         fprintf(stderr,"ERROR, no port providedn");
         exit(1);
     }
     sockfd = socket(AF_INET, SOCK_STREAM, 0);
     if (sockfd < 0) 
        error("ERROR opening socket");
     bzero((char *) &serv_addr, sizeof(serv_addr));
     portno = atoi(argv[1]);
     serv_addr.sin_family = AF_INET;
     serv_addr.sin_addr.s_addr = INADDR_ANY;
     serv_addr.sin_port = htons(portno);
     if (bind(sockfd, (struct sockaddr *) &serv_addr,
              sizeof(serv_addr)) < 0) 
              error("ERROR on binding");
     listen(sockfd,5);
     clilen = sizeof(cli_addr);
     newsockfd = accept(sockfd, 
                 (struct sockaddr *) &cli_addr, 
                 &clilen);
     if (newsockfd < 0) 
          error("ERROR on accept");
 while(1)
 {
 bzero(buffer,256);
 n = read(newsockfd,buffer,255);
 if (n < 0) error("ERROR reading from socket");
 printf("Here is the message: %sn",buffer);
 n = write(newsockfd,"I got your message",18);
 if (n < 0) error("ERROR writing to socket");
 }
 close(newsockfd);
 close(sockfd);
 return 0; 
}

这是我用于客户端的代码：

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h> 
void error(const char *msg)
{
    perror(msg);
    exit(0);
}
int main(int argc, char *argv[])
{
    int sockfd, portno, n;
    struct sockaddr_in serv_addr;
    struct hostent *server;
    char buffer[256];
    if (argc < 3) {
       fprintf(stderr,"usage %s hostname portn", argv[0]);
       exit(0);
    }
    portno = atoi(argv[2]);
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) 
        error("ERROR opening socket");
    server = gethostbyname(argv[1]);
    if (server == NULL) {
        fprintf(stderr,"ERROR, no such hostn");
        exit(0);
    }
    bzero((char *) &serv_addr, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    bcopy((char *)server->h_addr, 
         (char *)&serv_addr.sin_addr.s_addr,
         server->h_length);
    serv_addr.sin_port = htons(portno);
    if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) 
        error("ERROR connecting");
    while(1)
    {
    printf("Please enter the message: ");
    bzero(buffer,256);
    fgets(buffer,255,stdin);
    n = write(sockfd,buffer,strlen(buffer));
    if (n < 0) 
         error("ERROR writing to socket");
    bzero(buffer,256);
    n = read(sockfd,buffer,255);
    if (n < 0) 
         error("ERROR reading from socket");
    printf("%sn",buffer);
    }
    close(sockfd);
    return 0;
}

我使用 gcc 来编译 c 代码。然后我像这样运行它们：

在服务器端： ./server 32000

在客户端： ./client [IP address of server] 32000

消息从客户端传输到服务器。现在，如何测量吞吐量？我已经安装了iperf但我不知道在服务器和客户端运行时如何使用它。因为当它们运行时，我只能传输消息，我不能键入任何其他命令。

小鹰骨黑的以太网为10/100M。如何知道当前通信的以太网吞吐量？

Answer 1

您可以直接安装和使用 netperf，这是一个基准测试工具。您无需单独编写服务器和客户端。