netdev - Re: NIU driver: Sun x8 Express Quad Gigabit Ethernet Adapter

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Message-Id: <1226482593.6834.43.camel@localhost.localdomain>
Date:	Wed, 12 Nov 2008 10:36:33 +0100
From:	Jesper Dangaard Brouer <jdb@...x.dk>
To:	David Miller <davem@...emloft.net>
Cc:	jesper@...gh.cc, netdev@...r.kernel.org
Subject: Re: NIU driver: Sun x8 Express Quad Gigabit Ethernet Adapter

Hi DaveM

Before trying out the patch, I'll give you a small status on my
progress.

When using Sun's "nxge" driver everything works.  Although this driver
is quite slow because it does not use the new TX qdisc scheme.  I hacked
net/core/dev.c to avoid the qdisc TX code-path, and got an amazing
speedup, as I now can route 930 kpps (packets per sec).

I played a bit with the msglvl (debug log level) via:
  ethtool -s eth2 msglvl 0x587

Enabling:
 NETIF_MSG_TX_ERR
 NETIF_MSG_TX_QUEUED
 NETIF_MSG_TX_DONE

The thing I noticed is that it looks like the function niu_tx_work() is
never called... (it contains a niudbg(TX_DONE, ...))

-- 
Med venlig hilsen / Best regards
  Jesper Brouer
  ComX Networks A/S
  Linux Network developer
  Cand. Scient Datalog / MSc.
  Author of http://adsl-optimizer.dk
  LinkedIn: http://www.linkedin.com/in/brouer
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