From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Chris Friesen" Subject: Re: behaviour question for igb on nehalem box Date: Tue, 13 Oct 2009 11:32:43 -0600 Message-ID: <4AD4B9BB.3010209@nortel.com> References: <4ACF8466.5030309@nortel.com> <4ACFB9DF.9080909@nortel.com> <4ACFC52F.4050509@intel.com> <4ACFCBE8.7060108@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: e1000-list , Linux Network Development list , "Allan, Bruce W" , "Brandeburg, Jesse" , "Ronciak, John" , "Kirsher, Jeffrey T" , "gospo@redhat.com" To: Alexander Duyck Return-path: In-Reply-To: <4ACFCBE8.7060108@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: e1000-devel-bounces@lists.sourceforge.net List-Id: netdev.vger.kernel.org On 10/09/2009 05:48 PM, Alexander Duyck wrote: > The odds of any 2 flows overlapping when you are only using 4 flows is > pretty high, especially if the addresses/ports are close in range. You > typically need something on the order of about 16 flows over a wide > range of port numbers in order to get a good distribution. Yes, I realize this. However, I was surprised that we were seeing the packet count increasing for only one queue but the interrupt count increasing for more than one. Also, if we really crank up the traffic levels the box apparently panics. They're working on getting a serial cable hooked up to it to get the debug information, so I don't really have much information on that part just yet. We're going to try the out-of-tree drivers. Unfortunately it appears that the out-of-tree igb driver doesn't compile for this kernel. I suspect the compat code needs tweaking. Chris ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference