From: "Mark Chambers" <markc@mail.com>
To: "Iñigo Lopez Barranco" <ilopez@albatros-sl.es>,
linuxppc-embedded@ozlabs.org
Subject: Re: Ethernet on 5200 is using DMA?
Date: Thu, 18 Nov 2004 12:48:05 -0500 [thread overview]
Message-ID: <005301c4cd96$c9915570$0601a8c0@chuck2> (raw)
In-Reply-To: 42A622EB18325843894BB8E1040E3DF5022830@sinaexchf
I don't think it's possible to NOT use DMA on a 5200. If your link
is 100Mbps and you are putting out something close to that then
90% is not unreasonable. There are still memory copies involved.
Where is it getting the large file from? Maybe IDE is a bottleneck.
Mark Chambers
wvcomputronics.com
----- Original Message -----
From: "Iñigo Lopez Barranco" <ilopez@albatros-sl.es>
To: <linuxppc-embedded@ozlabs.org>
Sent: Thursday, November 18, 2004 11:55 AM
Subject: Ethernet on 5200 is using DMA?
Hi. I'm using linuxppc_2_4_devel from Denx CVS on a Lite5200 board.
When doing "put" of a large file to a ftp server, ftp eats all the CPU
available (90%+). I suspect it's not using DMA for the ethernet. Is this
right?
Thanks in advance.
Iñigo
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prev parent reply other threads:[~2004-11-18 17:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-18 16:55 Ethernet on 5200 is using DMA? Iñigo Lopez Barranco
2004-11-18 17:48 ` Mark Chambers [this message]
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