On Fri, Aug 24, 2007 at 08:52:03AM -0700, Stephen Hemminger wrote: > > You need hardware support for deferred interrupts. Most devices have it > (e1000, sky2, tg3) > and it interacts well with NAPI. It is not a generic thing you want done by > the stack, > you want the hardware to hold off interrupts until X packets or Y usecs have > expired.
Just to be clear, in the previous email I posted on this thread, I described a worst-case network ping-pong test case (send a packet, wait for reply), and found out that a deffered interrupt scheme just damaged the performance of the test case. Since the folks who came up with the test case were adamant, I turned off the defferred interrupts. While defferred interrupts are an "obvious" solution, I decided that they weren't a good solution. (And I have no other solution to offer). --linas - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
