[dpdk-dev] Best example for showing throughput?
Thomas Monjalon
thomas.monjalon at 6wind.com
Fri May 24 16:41:38 CEST 2013
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
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