DBS: Distributed Benchmark System

Performacd Evaluation on FDDI

• Structure

  

• Data sheet

    CPU                 INDY  (Silicon Graphics)
    OS                  IRIX R5.3
    TCP Buffer Size     65535byte
    Message Size        8192byte
    Start Time          HOST1--HOST6: 0.00s
                        HOST2--HOST7: 0.50s
                        HOST3--HOST8: 1.00s
                        HOST4--HOST9: 1.00s
                        HOST5--HOST10: 1.50s
    Number of Send      1000
    

• DBS Command File

• Sequence Number(Application Level)

  

  You can see TCP Deadlock occured at 0s~0.2s ,0.5s~0.7s, 1.0s~1.2s and 1.5~1.7 caused by Slow-Start and Delayed ACK.

• Throughput(Application Level)

  

  When the number of data streams is N, the throughput of each data streams is nealy 1/N of the data link throughput. When the number of data streams increase or decrease, each throughput changes to 1/N accordingly. How fairness FDDI is! This means FDDI is familiar with TCP.