On Wed, Aug 27, 2008 at 03:18:24PM -0700, David Miller wrote:

From: Andi Kleen <redacted>
Date: Wed, 27 Aug 2008 18:27:35 +0200

quoted

quoted

Those banks really want to crank down on latency - to the point they 
start disabling interrupt coalescing.  I bet they'd toss anything out 
they could to shave another microsecond.

This change would actually likely lower their latency.

They want the timestamps, but they want it to match when the packet
arrived at their system as closely as is reasonably possible.

Then they should use hardware time stamps which are increasingly 
available (e.g. current Intel e1000 design has them and I expect
others too). 

-Andi