From: "Michael Chan" <mchan@broadcom.com>
To: "Ben Greear" <greearb@candelatech.com>
Cc: "'netdev@oss.sgi.com'" <netdev@oss.sgi.com>
Subject: Re: BCM5704 performance questions.
Date: Thu, 09 Jun 2005 16:56:16 -0700 [thread overview]
Message-ID: <1118361376.5838.20.camel@rh4> (raw)
In-Reply-To: <42A8E0FE.3020708@candelatech.com>
On Thu, 2005-06-09 at 17:38 -0700, Ben Greear wrote:
>
> * Is the BCM5704 chipset/driver really that much slower?
>
Unfortunately, the 5704 requires the "ONE_DMA" workaround which will
limit throughput in a PCIX 100/133 bus. If you comment out the line that
sets the DMA_RWCTRL_ONE_DMA flag in tg3.c, you should see improved
performance. However, you may run into some DMA issues on certain
systems.
> * Is there some information on tuning the tg3 somewhere?
> (I didn't see a Documentation/networking/tg3.txt file, for instance)
>
> * Is there a way to verify the bus speed that the NIC is running at?
> (ethtool -d ethX gives lots of meaningless (to me) hex)
>
tg3 probing string for each device will tell you the bus type, width,
and speed.
next prev parent reply other threads:[~2005-06-09 23:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-10 0:38 BCM5704 performance questions Ben Greear
2005-06-09 23:56 ` Michael Chan [this message]
2005-06-10 1:24 ` Ben Greear
2005-06-10 0:37 ` Michael Chan
2005-06-10 21:09 ` Ben Greear
2005-06-10 21:16 ` Michael Chan
2005-06-10 22:35 ` Ben Greear
2005-06-10 22:43 ` David S. Miller
2005-06-10 21:33 ` Rick Jones
2005-06-10 21:56 ` Ben Greear
2005-06-10 22:03 ` Rick Jones
2005-06-10 22:25 ` Ben Greear
2005-06-10 14:03 ` Jason Lunz
2005-06-10 0:54 ` David S. Miller
2005-06-10 1:20 ` Ben Greear
2005-06-10 1:29 ` David S. Miller
2005-06-10 2:28 ` Ben Greear
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