* Ethernet on 5200 is using DMA?
@ 2004-11-18 16:55 Iñigo Lopez Barranco
2004-11-18 17:48 ` Mark Chambers
0 siblings, 1 reply; 2+ messages in thread
From: Iñigo Lopez Barranco @ 2004-11-18 16:55 UTC (permalink / raw)
To: linuxppc-embedded
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.
I=F1igo
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Ethernet on 5200 is using DMA?
2004-11-18 16:55 Ethernet on 5200 is using DMA? Iñigo Lopez Barranco
@ 2004-11-18 17:48 ` Mark Chambers
0 siblings, 0 replies; 2+ messages in thread
From: Mark Chambers @ 2004-11-18 17:48 UTC (permalink / raw)
To: Iñigo Lopez Barranco, linuxppc-embedded
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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Linuxppc-embedded@ozlabs.org
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2004-11-18 16:55 Ethernet on 5200 is using DMA? Iñigo Lopez Barranco
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