From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: Best example for showing throughput? Date: Fri, 24 May 2013 16:41:38 +0200 Message-ID: <201305241641.38896.thomas.monjalon@6wind.com> References: <519F74F6.3000903@mahan.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: dev-VfR2kkLFssw@public.gmane.org To: Patrick Mahan Return-path: In-Reply-To: <519F74F6.3000903-5dHXHCkEAVbYtjvyW6yDsg@public.gmane.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" Hello, 24/05/2013 16:11, Patrick Mahan : > Intel Xeon E5-2690 (8 physical, 16 virtual) How many CPU sockets have you ? > 64 Gbyte DDR3 memory > Intel 82599EB-SPF dual port 10GE interface > CentOS 6.4 (2.6.32-358.6.1.el6.x86_64) > The 82599 is in a 16x PCI-e slot. Check the datasheet of your motherboard. Are you sure it is wired as a 16x PCI-e ? Is it connected to the right NUMA node ? > I have it attached to an IXIA box. I have been running the app 'testpmd' > in iofwd mode with 2K rx/tx descriptors and 512 burst/mbcache. I have been > varying the # of queues and unfortunately, I am not seeing full line rate. What is your command line ? > I am seeing about 20-24% droppage on the receive side. It doesn't seem to > matter the # of queues. If queues are polled by different cores, it should matter. > Question 1: Is 'testpmd' the best application for this type of testing? If > not, which program? Or do I need to roll my own? testpmd is the right application for performance benchmark. It is also possible to use examples l2fwd/l3fwd but you should keep testpmd. > Question 2: I have blacklisted the Intel i350 ports on the motherboard and > am using ssh to access the platform. Could this be affecting the test? You mean i350 is used for ssh ? It shouldn't significantly affect your test. -- Thomas