From: Eric Dumazet <eric.dumazet@gmail.com>
To: Eldon Koyle <esk-netdev@esk.cs.usu.edu>
Cc: netdev@vger.kernel.org
Subject: Re: ixgbe RSS not working as expected with 8021q and bridging
Date: Fri, 11 Dec 2009 01:11:34 +0100 [thread overview]
Message-ID: <4B218E36.4030808@gmail.com> (raw)
In-Reply-To: <20091210231103.GA20231@esk.cs.usu.edu>
Le 11/12/2009 00:11, Eldon Koyle a écrit :
> We have built a firewall with two 10 Gbit interfaces (intel 82598EB) and
> are doing some testing. A simple bridge between the two interfaces acts
> as expected with packets being distributed fairly evenly across all of
> the rx/tx queues.
>
> We then switched to tagged vlans on both interfaces (10 vlans each, 8
> source and 8 dest addresses per vlan) and bridged eth0.N to eth1.N, and
> many of our queues (and CPUs) remained idle, and all of our VLAN traffic
> went out on the same tx queue. Are multiple transmit queues supported
> with 802.1q? How do we figure out what is causing some of our receive
> queues to be unused?
>
> We are using 2.6.31 (from Debian) and ixgbe-2.0.44.14 .
>
You need more recent kernel (2.6.32) to get multi queue support on vlans, sorry.
commit 2f8bc32b7a08502a79e0ccec8697000f2977f2fd
Author: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu Sep 3 02:19:58 2009 -0700
vlan: enable multiqueue xmits
vlan_dev_hard_start_xmit() & vlan_dev_hwaccel_hard_start_xmit()
select txqueue number 0, instead of using index provided by
skb_get_queue_mapping().
This is not correct after commit 2e59af3dcbdf11635c03f
[vlan: multiqueue vlan device] because
txq->tx_packets & txq->tx_bytes changes are performed on
a single location, and not the right locking.
Fix is to take the appropriate struct netdev_queue pointer
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
next prev parent reply other threads:[~2009-12-11 0:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-10 23:11 ixgbe RSS not working as expected with 8021q and bridging Eldon Koyle
2009-12-11 0:11 ` Eric Dumazet [this message]
2009-12-15 17:21 ` Eldon Koyle
2009-12-15 19:33 ` Eric Dumazet
2010-02-10 20:50 ` Eldon Koyle
2010-02-12 19:03 ` Eldon Koyle
2010-02-12 19:48 ` Eric Dumazet
2010-02-12 19:52 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B218E36.4030808@gmail.com \
--to=eric.dumazet@gmail.com \
--cc=esk-netdev@esk.cs.usu.edu \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).