From: "Brandeburg, Jesse" <jesse.brandeburg@intel.com>
Date: Fri, 20 Mar 2009 10:27:17 -0700 (Pacific Daylight Time)

quoted text
> 64 is pretty much the global default for all drivers, not just ixgbe, we 
> didn't "pick" it at all.  at 10 Gb Ethernet speeds, we get a LOT of 
> packets.  When you play with budget you're decreasing the amount of cache 
> coherency you get by handing lots of packets at once.

You're also potentially decreasing fairness with other devices
in the system.

That's the purpose of this value, to allow preemption to other
active NAPI contexts in the current softirq processing run.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html