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Date:	Sun, 9 Mar 2014 15:22:21 -0400
From:	Ming Chen <>
To:	Eric Dumazet <>,
	John Fastabend <>
Cc:, Erez Zadok <>,
	Dean Hildebrand <>,
	Geoff Kuenning <>
Subject: Re: [BUG?] ixgbe: only num_online_cpus() of the tx queues are enabled

Hi Eric and John,

I could not get the command working:

#ethtool -l p3p1
Channel parameters for p3p1:
Pre-set maximums:
RX:             0
TX:             0
Other:          1
Combined:       63
Current hardware settings:
RX:             0
TX:             0
Other:          1
Combined:       6

#ethtool -L p3p1 rx 1 tx 1
Cannot set device channel parameters: Invalid argument

#ethtool -L p3p1 rx 1 tx 1 other 1
other unmodified, ignoring
Cannot set device channel parameters: Invalid argument


On Sun, Mar 9, 2014 at 9:44 AM, Eric Dumazet <> wrote:
> If you want to use a single queue, just declare a single queue on your
> NIC...
> ethtool -L eth0 rx 1 tx 1
> Multiqueue is not a requirement in your case. You can easily reach line
> rate with a single queue on a 10Gbe NIC.
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