netdev - RE: How can i know if I/OAT is supported?

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Date:	Mon, 16 Jun 2008 15:37:00 +0100
From:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>
To:	<dotanba@...il.com>
Cc:	<olel@....pl>, <netdev@...r.kernel.org>
Subject: RE: How can i know if I/OAT is supported?

Hi Dotan,

>>> I'm trying to use the I/OAT technology but i don't know if the the
>>> sent data used this technology.
>>> Are there are any counters which indicates how many data was sent
using
>>> I/OAT?
>> 
>> for f in /sys/class/dma/*; do echo "$f: bytes=`cat
$f/bytes_transferred`
>> count=`cat $f/memcpy_count`" ; done
> 
> I have the folder /sys/class/dma/, but this folder is empty.
> What does it mean?

It means that you do not have ioatdma module loaded.
Simply try: modprobe ioatdma.
If driver installs correctly, you should see statistics in
/sys/class/dma/

> 
> thanks
> Dotan

Regards,
Maciej

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