netdev - Re: [BUG?] ixgbe: only num_online_cpus() of the tx queues are enabled

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Date:	Sun, 9 Mar 2014 15:22:21 -0400
From:	Ming Chen <v.mingchen@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	John Fastabend <john.r.fastabend@...el.com>
Cc:	netdev@...r.kernel.org, Erez Zadok <ezk@....cs.sunysb.edu>,
	Dean Hildebrand <dhildeb@...ibm.com>,
	Geoff Kuenning <geoff@...hmc.edu>
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

Best,
Ming

On Sun, Mar 9, 2014 at 9:44 AM, Eric Dumazet <eric.dumazet@...il.com> 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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