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: Fri, 10 Jun 2005 14:16:43 -0700 [thread overview]
Message-ID: <1118438203.5294.7.camel@rh4> (raw)
In-Reply-To: <42AA016C.9050801@candelatech.com>
On Fri, 2005-06-10 at 14:09 -0700, Ben Greear wrote:
> I commented out the code and ran the pktgen test again. It may be a small
> bit better, but not much: 770Mbps in one direction, 750Mbps in the other.
>
The latest tg3 driver will print out the dma_rwctrl at probe time. Can
you check the value to make sure ONE_DMA is disabled? Bit 14 sets
ONE_DMA.
> Have you done any tests with 2 tg3 NICs in a single machine to see if they
> can run at or near line speed (full duplex)?
>
Yes, we have years ago but not with the tg3 driver. We set up the 5704
to bridge (or route, I don't remember) one port to the other. It cannot
bridge at line-rate with the ONE_DMA workaround enabled.
next prev parent reply other threads:[~2005-06-10 21:16 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
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 [this message]
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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