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Thread: Information request and tuning question

  1. #1
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    Information request and tuning question

    Hi,
    I want to know how works autotuninglevel ?
    Then, is dca and netdma enabled decrease network performance ?
    And RWIN should be BDP(Rwin = ping x dl(kbps) / 8 / MSS et result round x MSS) or RWIN provided by Tcp Analyser ?

  2. #2
    Administrator Philip's Avatar
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    Autotuninglevel is determined by the OS depending on line conditions.
    RWIN can't be directly set in newest Windows versions, so even though the Analyzer method is most efficient it is a moot point for Windows 8/10.
    The effect of most of those settings are explained in the TCP Optimizer documentation, and in our tweaking articles on the main site:

    https://www.speedguide.net/articles/...8-10-2012-5821
    https://www.speedguide.net/articles/...ip-tweaks-5077

  3. #3
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    So, what rwin should I use ?

    SpeedGuide.net TCP Analyzer Results
    Tested on: 2019.02.19 10:05
    IP address: 86.234.xxx.xxx
    Client OS/browser: Windows 10 (Chrome 72.0.3626.109)

    TCP options string: 020405b40103030801010402
    MSS: 1460
    MTU: 1500
    TCP Window: 262656 (not multiple of MSS)
    RWIN Scaling: 8 bits (2^8=256)
    Unscaled RWIN : 1026
    Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
    BDP limit (200ms): 10506kbps (1313KBytes/s)
    BDP limit (500ms): 4202kbps (525KBytes/s)
    MTU Discovery: ON
    TTL: 111
    Timestamps: OFF
    SACKs: ON
    IP ToS: 01001000 (72)
    Precedence: 010 (immediate)
    Delay: 0 (normal delay)
    Throughput: 1 (high throughput)
    Reliability: 0 (normal reliability)
    Cost: 0 (normal cost)
    Check bit: 0 (correct)
    DSCP (DiffServ): AF21 010010 (18) - Assured Forwarding class 2, low drop precedence (RFC 2597).

  4. #4
    Administrator Philip's Avatar
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    Autotuninglevel - Normal

    You can't set RWIN directly under Windows 10. For OSes that you can, one of the Analyzer recommended settings is most efficient.

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