why the altera TSE is so slow in qsys_ghrd_3c120 + nios2 linux

[Altera_Forum]

hi, all, 

my hardware is Cyclone III FPGA Development Kit (3C120 board), and the quartus project is qsys_ghrd_3c120 I have succeed running nios2 linux ( refer to http://rocketboards.org/foswiki/view/documentation/niosiilinuxusermanualforcycloneiii),  the altera TSE is verified to work in 1000M full duplex mode. then I test the altera TSE speed between the nios2 linux and the PC Windows with the following function in linux , then I find the udp transaction speed is only about 40~50Mbps,   why so slow?   anyone can tell me what's the problem? and how to get higher speed for altera TSE +nios2 linux?  thanks!!  my udp transaction function is :   int udp_handshake( ) {  int ipLen,i,iRet;  unsigned short udp_marks[8];  int net_error;   net_error=0;   printf("now to handshake by udp\n");    m_udp_socket=socket(AF_INET,SOCK_DGRAM,0);   memset(&addrin,0, sizeof(struct sockaddr_in) );  addrin.sin_family=AF_INET;  addrin.sin_port = htons(3500);   memset(&addrin.sin_zero,0,8);   if(bind(m_udp_socket,(struct sockaddr *)&addrin, sizeof(struct sockaddr_in))) //int bind (int SOCKET, struct sockaddr *ADDR, socklen_t LENGTH)  {  printf("can't creat net interface.......\r\n");  close(m_udp_socket);  return 0;  }   ipLen=sizeof(struct sockaddr_in);  for(i=0;i<8;i++)  {  udp_marks[i]=0;  }  iRet=recvfrom(m_udp_socket, (char * )udp_marks, 16, 0,(struct sockaddr *)&addrin, &ipLen); //first recv mark by blocking mode    printf("pc IP:%s port:%d\r\n",inet_ntoa(addrin.sin_addr),ntohs(addrin.sin_port) );    addrin.sin_port=htons(3500); ipLen=sizeof(struct sockaddr_in);   //test altera TSE speed with udp sending loop, data_length is from 1 to 32, so 1K to 32K data is sent by one sendto  for (i=0;i<send_loop;i++)   {  iRet=sendto(m_udp_socket, (char *)pData_buff, data_length*1024,0,(struct sockaddr *)&addrin,ipLen); //second send back handshake   if (iRet==-1)  {  net_error=1;  }  }     shutdown(m_udp_socket,2); close(m_udp_socket);   return 1;  }

[Altera_Forum]

Hi,  

 I read your thread, because you run the project from Rocketboards (http://rocketboards.org/foswiki/view/documentation/niosiilinuxusermanual (http://rocketboards.org/foswiki/view/documentation/niosiilinuxusermanual)) on the 3c120 board. That's what I want to do too, but it doesn't work so far.  U-boot is running on my board, but the kernel doesn't boot after it is unpacked.  I am really sorry I can't help you with your problem now. Hopefully I will be able later, when my board is running.  Could you tell me, which versions of U-Boot, Linux kernel and buildroot you used? And which "qsys_ghrd_3c120" did you use? There are two (13.0 and 13.1) on this page: https://www.altera.com/support/support-resources/design-examples/intellectual-property/embedded/nios-ii/exm-mmu.html for the 3c120 board. Or did you use another one?  David

[Altera_Forum]

Hi,  

 i am working with the manual from rocketboards on the 3c120 board too. But it is not working on my board.  Could you tell me, which versions of u-boot, linux kernel and buildroot you used? And which "qsys_ghrd_3c120" did you use? There are two (13.0 and 13.1) on this site: https://www.altera.com/support/support-resources/design-examples/intellectual-property/embedded/nios-ii/exm-mmu.html (https://www.altera.com/support/support-resources/design-examples/intellectual-property/embedded/nios-ii/exm-mmu.html) Or did you use another one?