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Thread: Would appreciate some assistance

  1. #1
    Junior Member
    Join Date
    Jun 2012
    Posts
    3

    Would appreciate some assistance

    My concern is torrent speeds, When I ran mlab's ndt is came back with "89.59% of the time the connection is limited by the client machine's receive buffer." I did a little googling which brought me to this sight but still have little understanding of what this is. I'll post the rest of the results below. Thank you for your time and assistance.
    EDIT: posted hijack this log but it "has to be approved my moderator"
    Speedguides stuff:
    1. DSL PPOE
    2. ATT dryloop 6mbps/.7mbps
    3.

    « SpeedGuide.net TCP Analyzer Results »
    Tested on: 2012.06.26 19:59
    IP address: 76.248.xxx.xxx
    Client OS/browser: Windows 7 (Chrome 19.0.1084.56)

    TCP options string: 020405ac0103030201010402
    MSS: 1452
    MTU: 1492
    TCP Window: 17520 (NOT multiple of MSS)
    RWIN Scaling: 2 bits (2^2=4)
    Unscaled RWIN : 4380
    Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
    BDP limit (200ms): 701kbps (88KBytes/s)
    BDP limit (500ms): 280kbps (35KBytes/s)
    MTU Discovery: ON
    TTL: 113
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)
    4. Windows 7 64bit
    Last edited by aibandit; 06-26-12 at 07:16 PM.

  2. #2
    Junior Member
    Join Date
    Jun 2012
    Posts
    3
    MLab results
    Your system: Windows 7 version 6.1
    Java version: 1.7.0_05 (x86)

    TCP receive window: 261360 current, 261360 maximum
    1.0E-6 packets lost during test
    Round trip time: 39 msec (minimum), 480 msec (maximum), 374.53 msec (average)
    Jitter: 441 msec
    0 seconds spend waiting following a timeout
    TCP time-out counter: 611
    0 selective acknowledgement packets received

    No duplex mismatch condition was detected.
    The test did not detect a cable fault.
    No network congestion was detected.
    No network address translation appliance was detected.

    0.0962% of the time was not spent in a receiver limited or sender limited state.
    89.59% of the time the connection is limited by the client machine's receive buffer.
    Optimal receive buffer: 267632640 bytes
    0 duplicate ACKs set

  3. #3
    Junior Member
    Join Date
    Jun 2012
    Posts
    3
    Mlab advanced results
    WEB100 Kernel Variables:
    Client: localhost/127.0.0.1
    CurMSS: 1452
    X_Rcvbuf: 87380
    X_Sndbuf: 676216
    AckPktsIn: 2147
    AckPktsOut: 0
    BytesRetrans: 0
    CongAvoid: 0
    CongestionOverCount: 0
    CongestionSignals: 0
    CountRTT: 2147
    CurCwnd: 262812
    CurRTO: 611
    CurRwinRcvd: 261360
    CurRwinSent: 5888
    CurSsthresh: 2147483647
    DSACKDups: 0
    DataBytesIn: 0
    DataBytesOut: 6613892
    DataPktsIn: 0
    DataPktsOut: 4494
    DupAcksIn: 0
    ECNEnabled: 0
    FastRetran: 0
    MaxCwnd: 262812
    MaxMSS: 1452
    MaxRTO: 655
    MaxRTT: 480
    MaxRwinRcvd: 261360
    MaxRwinSent: 5888
    MaxSsthresh: 0
    MinMSS: 1452
    MinRTO: 241
    MinRTT: 39
    MinRwinRcvd: 17424
    MinRwinSent: 5840
    NagleEnabled: 1
    OtherReductions: 0
    PktsIn: 2147
    PktsOut: 4494
    PktsRetrans: 0
    RcvWinScale: 7
    SACKEnabled: 3
    SACKsRcvd: 0
    SendStall: 0
    SlowStart: 179
    SampleRTT: 411
    SmoothedRTT: 411
    SndWinScale: 2
    SndLimTimeRwin: 9046295
    SndLimTimeCwnd: 971685
    SndLimTimeSender: 79669
    SndLimTransRwin: 5
    SndLimTransCwnd: 15
    SndLimTransSender: 12
    SndLimBytesRwin: 5779072
    SndLimBytesCwnd: 781632
    SndLimBytesSender: 53188
    SubsequentTimeouts: 0
    SumRTT: 804110
    Timeouts: 0
    TimestampsEnabled: 0
    WinScaleRcvd: 2
    WinScaleSent: 7
    DupAcksOut: 0
    StartTimeUsec: 196453
    Duration: 10100896
    c2sData: 2
    c2sAck: 2
    s2cData: 8
    s2cAck: 3
    half_duplex: 0
    link: 10
    congestion: 0
    bad_cable: 0
    mismatch: 0
    spd: 5.24
    bw: 29.58
    loss: 0.000001000
    avgrtt: 374.53
    waitsec: 0.00
    timesec: 10.00
    order: 0.0000
    rwintime: 0.8959
    sendtime: 0.0079
    cwndtime: 0.0962
    rwin: 1.9940
    swin: 5.1591
    cwin: 2.0051
    rttsec: 0.374527
    Sndbuf: 676216
    aspd: 0.00000
    CWND-Limited: 4739.72
    minCWNDpeak: -1
    maxCWNDpeak: -1
    CWNDpeaks: -1

    The theoretical network limit is 29.58 Mbps
    The NDT server has a 330.0 KByte buffer which limits the throughput to 13.77 Mbps
    Your PC/Workstation has a 255.0 KByte buffer which limits the throughput to 5.32 Mbps
    The network based flow control limits the throughput to 5.35 Mbps

    Client Data reports link is 'T1', Client Acks report link is 'T1'
    Server Data reports link is 'OC-48', Server Acks report link is 'Ethernet'

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