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My linux uname -a command outputs:

Linux Davinci001 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

So, does NICs with this Ubuntu machine is working with BQL (Byte Queue Limit) algorithms or TX and RX ring buffers?

ethtool command displays this:

Ring parameters for eth1: Pre-set maximums: RX: 2040 RX Mini: 0 RX Jumbo: 8160 TX: 255 Current hardware settings: RX: 255 RX Mini: 0 RX Jumbo: 0 TX: 255

How can I know if BQL is currently running or old TX RX ring buffer mechanisms running in NIC driver.

I need this information to resolve problem: I have UDP packet losses in particular multicasts where bitrate high and bursty.

If BQL is running, then how can I turn it off and start old TX and RX ring buffer mechanisms.

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    Do you have to use an old and unsupported kernel? Or, for that matter, Ubuntu?
    – Michael Hampton
    Dec 20, 2014 at 19:53
  • Sorry I didn't get your meaning. Can you please explain me?
    – brb tea
    Dec 20, 2014 at 20:20

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