NDT-DEV email list created

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

New issue 6 by sekharnv73: Recive and Send buffer problem not reported in  
statistics window.
http://code.google.com/p/ndt/issues/detail?id=6

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.
        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 32768 32768" > /proc/sys/net/ipv4/tcp_rmem
        echo "4096 16384 16384" > /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 staticstics window

What is the expected output? What do you see instead?
Since Throughput can be improved by increasing the recive and send buffers
messege should be displayed in statistics window.
But No message has been displayed syaing that by increasing the recive and
send buffers throughput can be increased. And also the buffer sizes
displayed in the more details page is also not correct. Server receive
buffer showed as 8K instead of 32k  and client receive buffer is showed as
22k instead of 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:
        Recive and send buffer problem not reported.png  211 KB

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