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Reference Router Performance problem

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  • Reference Router Performance problem

    Hi All,

    I have downloaded the reference_router.bit into NetFPGA
    Ran the rkd daemon. ./rkd
    Connected two machines (both have GIG-E card) to each other through a LAN cable
    pc1 IP : ,
    pc2 IP: ,
    NETFPGA nf2c0 --- nf2c3 ip: ----

    pc1-----------------NetFPGA -----------------------pc2

    pc1 and Pc2 Ping each other OK.

    The problem :
    When I do the throughput test using Netperf,(pc1 run netserver, pc2 run netperf, Netfpga works as a routerin the middle ). I can only get around 260 Mbit/s with 64 byte packets. This number is similar to Linux kernel router running on the same machine. (netperf -H pc1 -t UDP_STREAM -- -m 64 ) .

    More tests results.
    same setting, and different packet size.

    packet size / throughput
    64 bytes / 254.44 mbits/s
    224 bytes / 711.78 mbits/s
    512 bytes / 864.35 mbits/s
    1500 bytes / 917.52 mbits/s

    It seems something wrong. For a hardware router, I suppose to get a higher throughput, even for the small packet size, for example, more than 700Mbits/s.

    Is this a expected result or I need to do some specific configuration. Does anyone did the similar test and get the similar results?

    By the way, For packet size 1500 bytes, I can get 960 Mbits/s, (netperf -H pc1 -t UDP_STREAM -- -m 1500)

    some information netfpga router pc.
    [email protected] Desktop]# route
    Kernel IP routing table
    Destination Gateway Genmask Flags Metric Ref Use Iface * U 0 0 0 nf2c3 * U 0 0 0 nf2c2 * U 0 0 0 nf2c1 * U 0 0 0 nf2c0
    Last edited by pengfeizhang; 01-21-2011, 09:20 PM.

  • #2
    You are right. When two PCs are directly connected, I cannot get high data rate either.
    In my experimental settings, the NIC is the bottleneck, not the NetFPGA.


    • #3
      I also have the same problem , in my office many systems are connected together that's why i could not get the high speed and high data rate , please suggest something to check this problem, i have tried many things told by many people but nothing works out for me, hope you could help me, thanks in advance

      Helpful Site
      Last edited by Conleyer; 08-11-2012, 06:45 AM.
      click for info