On Thu, 2007-29-11 at 12:08 -0800, Nelson, Shannon wrote:

[RFC] I/OAT: Handle incoming udp through ioatdma

From: Shannon Nelson <redacted>

If the incoming udp packet is larger than sysctl_udp_dma_copybreak, try
pushing it through the ioatdma asynchronous memcpy.  This is very much
the
same as the tcp copy offload.  This is an RFC because we know there are
stability problems under high traffic.

What stability problems?

Is there some magic sysctl_udp_dma_copybreak threshold value where you
start seeing the benefit of IOAT-ing? Since you mentioned
"students"<evil grin here>, it would be interesting to see data where
udp starts benefitting.


cheers,
jamal