NDT-DEV email list created

Status: Accepted
Owner: sekharnv73
Labels: Type-Defect Priority-Medium

New issue 7 by sekharnv73: Send Buffer size displayed in the statistics  
window is not matching
http://code.google.com/p/ndt/issues/detail?id=7

What steps will reproduce the problem?

1. Connect server and client in a 1GBit Switch
2. Start both servers (fakewww and web100)
3. Set the following tcp paramters in both server and client.
   Server
        echo 0 > /proc/sys/net/ipv4/tcp_moderate_rcvbuf
        echo 4194304 > /proc/sys/net/core/wmem_max
        echo 4194304 > /proc/sys/net/core/rmem_max
        echo "4096 87380 4194304" > /proc/sys/net/ipv4/tcp_rmem
        echo "4096 32768 32768" > /proc/sys/net/ipv4/tcp_wmem
        echo "1" > /proc/sys/net/ipv4/tcp_timestamps
        echo "1" > /proc/sys/net/ipv4/tcp_window_scaling
        echo "1" > /proc/sys/net/ipv4/tcp_sack
        echo "1" > /proc/sys/net/ipv4/tcp_ecn

   Client
        echo 0 > /proc/sys/net/ipv4/tcp_moderate_rcvbuf
        echo 4194304 > /proc/sys/net/core/wmem_max
        echo 4194304 > /proc/sys/net/core/rmem_max
        echo "4096 87380 4194304" > /proc/sys/net/ipv4/tcp_rmem
        echo "4096 16384 4194304" > /proc/sys/net/ipv4/tcp_wmem
        echo "1" > /proc/sys/net/ipv4/tcp_timestamps
        echo "0" > /proc/sys/net/ipv4/tcp_window_scaling
        echo "1" > /proc/sys/net/ipv4/tcp_sack
        echo "1" > /proc/sys/net/ipv4/tcp_ecn

4. Click the start button to start the test and wait till client complete
the test.
5. Check the statistics window.

What is the expected output? What do you see instead?
When promting the send buffer size problem current size of the send buffer
should be displayed.
But statistics window is displaying the send buffer size as 16K with is not
correct. In the more details page NDT server send buffer size X_Sendbuf
values is displayed correctly 32768 (32K)

What version of the product are you using? On what operating system?
NDT server 3.6.0
Client : Linux (Ubuntu 9)

Please provide any additional information below.

Attachments:
        Sendbuffer size problem.png  216 KB

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