千兆网路极限速度能有多少
你检查一下是不是整数溢出了，3M * 10000 \u0026gt; 2^32。if(now \u0026gt; seconds+1){ seconds = now;看了你的代码，你的计时写错了，你测量的是每两秒钟的数据量，当作每秒数据量来显示了。
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#include\u0026lt;sys/types.h\u0026gt;#include\u0026lt;sys/socket.h\u0026gt;#include\u0026lt;netinet/in.h\u0026gt;#include\u0026lt;arpa/inet.h\u0026gt;#include\u0026lt;unistd.h\u0026gt;#include \u0026lt;stdio.h\u0026gt;#include \u0026lt;stdlib.h\u0026gt;#include \u0026lt;strings.h\u0026gt;#include\u0026lt;sys/wait.h\u0026gt;#include \u0026lt;string.h\u0026gt;#include \u0026lt;sys/select.h\u0026gt; // for select #include \u0026lt;time.h\u0026gt;/********************************************************************* *filename: tcpserver.c *purpose:tcp·t????3ìDò ********************************************************************/int main(int argc, char ** argv) { int sockfd,new_fd;/* ?àìysocket: sock_fd,êy?Y??ê?socket: new_fd */ struct sockaddr_in my_addr; /* ±??úμ??·D??￠ */ struct sockaddr_in their_addr; /* ?í?§μ??·D??￠ */ unsigned int sin_size, myport, lisnum; struct timeval select_time={0,1000}; int snd_size = 0; int rcv_size = 0; socklen_t optlen; time_t seconds,now; fd_set readset; fd_set writeset; fd_set exceptset; int maxfd=-1; FD_ZERO(\u0026amp;readset); FD_ZERO(\u0026amp;writeset); FD_ZERO(\u0026amp;exceptset); if(argv) myport = atoi(argv); else myport = 8800; if(argv) lisnum = atoi(argv); else lisnum = 2; if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) { perror("socket"); exit(1); } optlen = sizeof(rcv_size); int err = getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF,\u0026amp;rcv_size, \u0026amp;optlen); if(err\u0026lt;0){ printf("err\"); } printf(" RCV_SIZE: %d Byte\",rcv_size); rcv_size = 64*1024; err = setsockopt(sockfd,SOL_SOCKET,SO_RCVBUF, (char *)\u0026amp;rcv_size, optlen); if(err\u0026lt;0){ printf("err\"); } printf("socket %d ok \",myport); my_addr.sin_family=PF_INET; my_addr.sin_port=htons(myport); my_addr.sin_addr.s_addr = INADDR_ANY; bzero(\u0026amp;(my_addr.sin_zero), 0); if (bind(sockfd, (struct sockaddr *)\u0026amp;my_addr, sizeof(struct sockaddr)) == -1) { perror("bind"); exit(1); } printf("bind ok \"); if (listen(sockfd, lisnum) == -1) { perror("listen"); exit(1); } printf("listen ok \"); /* while(1) { sin_size = sizeof(struct sockaddr_in); if ((new_fd = accept(sockfd, (struct sockaddr *)\u0026amp;their_addr, \u0026amp;sin_size)) == -1) { perror("accept"); continue; } printf("server: got connection from %s\",inet_ntoa(their_addr.sin_addr)); if (!fork()) { //×ó??3ì?ú???? if (send(new_fd, "Hello, world!\", 14, 0) == -1) { perror("send"); close(new_fd); exit(0); } } close(new_fd); //????3ì2??ùDèòa??socket waitpid(-1,NULL,WNOHANG);//μè?y×ó??3ì?áê?￡???3y×ó??3ì?ù??ó?×ê?? } */ sin_size = sizeof(struct sockaddr_in); if ((new_fd = accept(sockfd, (struct sockaddr *)\u0026amp;their_addr, \u0026amp;sin_size)) == -1) { perror("accept"); exit(0); } printf("server: got connection from %s\",inet_ntoa(their_addr.sin_addr)); maxfd=new_fd+1; int step = 0; char rec_buff; char send_buff; for(step=14999;step\u0026gt;=0;step--) send_buff=\u0026#39;0\u0026#39;; int sent_time=0; seconds = time((time_t *)NULL); int rec_byte = 0; while(1) { char szSnd = {0}; char senddata; int datalen=0; FD_ZERO(\u0026amp;readset); FD_ZERO(\u0026amp;writeset); FD_ZERO(\u0026amp;exceptset); FD_SET(new_fd,\u0026amp;readset); FD_SET(new_fd,\u0026amp;writeset); FD_SET(new_fd,\u0026amp;exceptset); FD_SET(0,\u0026amp;readset); now = time((time_t *)NULL); switch(select(maxfd,\u0026amp;readset,\u0026amp;writeset,\u0026amp;exceptset,\u0026amp;select_time)) { case -1: exit(0); case 0: break; default: if(FD_ISSET(new_fd,\u0026amp;exceptset)) { perror("Except error:"); close(new_fd); break; }\tif(FD_ISSET(0,\u0026amp;readset))\t{\t datalen=read(0,senddata,20);\t senddata = https://www.zhihu.com/u0026#39;//0/u0026#39;;/t} if(FD_ISSET(new_fd,/u0026amp;writeset)) {
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