55. NIC Statistics Tests

This document provides benchmark tests for the userland Intel® 82599 Gigabit Ethernet Controller (Niantic) Poll Mode Driver (PMD). The userland PMD application runs the IO forwarding mode test described in the PMD test plan document with different parameters for the configuration of Niantic NIC ports.

The core configuration description is:

• 1C/1T: 1 Physical Core, 1 Logical Core per physical core (1 Hyperthread) using core #2 (socket 0, 2nd physical core)
• 1C/2T: 1 Physical Core, 2 Logical Cores per physical core (2 Hyperthreads) using core #2 and #14 (socket 0, 2nd physical core, 2 Hyperthreads)
• 2C/1T: 2 Physical Cores, 1 Logical Core per physical core using core #2 and #4 (socket 0, 2nd and 3rd physical cores)

55.1. Prerequisites

Each of the 10Gb Ethernet* ports of the DUT is directly connected in full-duplex to a different port of the peer traffic generator.

Using interactive commands, the traffic generator can be configured to send and receive in parallel, on a given set of ports.

The tool vtbwrun (included in Intel® VTune™ Performance Analyzer) will be used to monitor memory activities while running network benchmarks to check the number of Memory Partial Writes and the distribution of memory accesses among available Memory Channels. This will only be done on the userland application, as the tool requires a Linux environment to be running in order to be used.

If using vfio the kernel must be >= 3.6+ and VT-d must be enabled in bios.When using vfio, use the following commands to load the vfio driver and bind it to the device under test:

modprobe vfio
modprobe vfio-pci
usertools/dpdk-devbind.py --bind=vfio-pci device_bus_id

55.2. Test Case: Performance Benchmarking

The linuxapp is started with the following parameters, for each of the configurations referenced above:

1C/1T:

-c 0xffffff -n 3 -- -i --coremask=0x4 \
--rxd=512 --txd=512 --burst=32 --txfreet=32 --rxfreet=64 --mbcache=128 --portmask=0xffff \
--rxpt=4 --rxht=4 --rxwt=16 --txpt=36 --txht=0 --txwt=0 --txrst=32

1C/2T:

-c 0xffffff -n 3 -- -i --coremask=0x4004 \
--rxd=512 --txd=512 --burst=32 --txfreet=32 --rxfreet=64 --mbcache=128 --portmask=0xffff \
--rxpt=4 --rxht=4 --rxwt=16 --txpt=36 --txht=0 --txwt=0 --txrst=32

2C/1T:

-c 0xffffff -n 3 -- -i --coremask=0x14 \
--rxd=512 --txd=512 --burst=32 --txfreet=32 --rxfreet=64 --mbcache=128 --portmask=0xffff \
--rxpt=4 --rxht=4 --rxwt=16 --txpt=36 --txht=0 --txwt=0 --txrst=32

The throughput is measured for each of these cases for the packet size of 64, 65, 128, 256, 512, 1024, 1280 and 1518 bytes. The results are printed in the following table:

Frame Size	1C/1T	1C/2T	2C/1	wirespeed
64
65
128
256
512
1024
1280
1518

The memory partial writes are measured with the vtbwrun application and printed in the following table::

Sampling Duration: 000000.00 micro-seconds
---       Logical Processor 0       ---||---       Logical Processor 1       ---
---------------------------------------||---------------------------------------
---   Intersocket QPI Utilization   ---||---   Intersocket QPI Utilization   ---
---------------------------------------||---------------------------------------
---      Reads (MB/s):         0.00 ---||---      Reads (MB/s):         0.00 ---
---      Writes(MB/s):         0.00 ---||---      Writes(MB/s):         0.00 ---
---------------------------------------||---------------------------------------
---  Memory Performance Monitoring  ---||---  Memory Performance Monitoring  ---
---------------------------------------||---------------------------------------
--- Mem Ch 0: #Ptl Wr:      0000.00 ---||--- Mem Ch 0: #Ptl Wr:         0.00 ---
--- Mem Ch 1: #Ptl Wr:      0000.00 ---||--- Mem Ch 1: Ptl Wr (MB/s):   0.00 ---
--- Mem Ch 2: #Ptl Wr:      0000.00 ---||--- Mem Ch 2: #Ptl Wr:         0.00 ---
--- ND0 Mem #Ptl Wr:        0000.00 ---||--- ND1 #Ptl Wr:               0.00 ---