Hi all, Very preliminary testing with 20 procs on E1000 driver gives me following result:
skbsz Org BW New BW % Org demand New Demand % 32 315.98 347.48 9.97% 21090 20958 0.62% 96 833.67 882.92 5.91% 7939 9107 -14.71 But this is test running for just 30 secs (just too short) and netperf2 (not netperf4, which I am going to use later). Using single E1000 card cross-cable'd on 2.6.21.1 kernel on 2 CPU 2.8Ghz Xseries systems. I will have more detailed report next week, especially once I run netperf4. I am taking off for the next two days, so will reply later on this thread. Thanks, - KK David Miller <[EMAIL PROTECTED]> wrote on 05/11/2007 03:36:05 AM: > From: Gagan Arneja <[EMAIL PROTECTED]> > Date: Thu, 10 May 2007 14:50:19 -0700 > > > David Miller wrote: > > > > > If you drop the TX lock, the number of free slots can change > > > as another cpu gets in there queuing packets. > > > > Can you ever have more than one thread inside the driver? Isn't > > xmit_lock held while we're in there? > > There are restrictions wrt. when the xmit_lock and the > queue lock can be held at the same time. > > The devil is definitely in the details if you try to > implemen this. It definitely lends support for Eric D.'s > assertion that this change will only add bugs and doing > something simple like prefetches is proabably a safer > route to go down. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
