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VSPERF CNB - FAQs

  • Q1. How to start Spirent Virtual TGen. login to master node (10.10.120.22) as a root. Check the running virtual machines.
virsh list

if you don't see 'stc' and 'labserver in the entries, run them.

virsh start stc
virsh start labserver

Ensure that T-Rex is not Running.

  • Q2. How to stop these virtual TGens running as VMs. Ideally it should be with first set of commands, however, sometimes this may not work. Please use the second command set.
 sudo virsh shutdown stc --mode acpi
 sudo virsh shutdown labserver --mode acpi
 -- If it fails to shutdown --
 sudo virsh destroy stc
 sudo virsh destroy labserver
  • Q3. Which configuration file to use and modify for Spirent? Mention important fields to look out. The file to use is:
/home/opnfv/conf/vsperf-spirent.conf

Important fields to look out for:

TRAFFICGEN_STC_TRIAL_DURATION_SEC = "10"
TRAFFICGEN_STC_RATE_LOWER_LIMIT_PCT = "1.0"
TRAFFICGEN_STC_RATE_UPPER_LIMIT_PCT = "99.0"
TRAFFICGEN_STC_RATE_INITIAL_PCT = "99.0"
TRAFFICGEN_PKT_SIZES = (64, 128, 256, 512, 1024, 1280, 1518)
  • Q4. How to setup SRIOV? For now, you can run SRIOV tests with only TREX. With Spirent, unfortunately, this support is not yet there in VSPERF. You would need a GUI application.

On Node-1, if working with Virtual TGen, the PCIs are: PF1: 06:00.0 PF2: 06:00.1 VF1 of PF1: 06:10.0 VF1 of PF2: 06:10.1

Follow the below steps

  1. Ensure PFs are not bound to dpdk: Run script unbind-from-dpdk.sh , after ensuring the correct PCI Ids are used. Run unset-vfs.sh .
  2. Ensure that atleast/only 1 VF is enabled for each PF: Run setup-vfs.
  3. Ensure atleast/only 1 VF from each nic is associated with DPDK driver: Run bind-to-dpdk.sh
  4. While doing above steps regularly run print-nic-status.sh script.
  5. After Step-3 you are ready to start the pod.
  6. Once pod is started, and you run l2fwd. Node the 2 Mac addresses for port-0 and port-1. These are are VF1 or PF1 and VF2 of PF2 mac addresses, respectively. You need this to use in the Traffic Generator. Let us say port-0 mac address is - PM1, and port-1 mac address is PM2.
  7. Open file /home/opnfv/vswitchperf/conf/03_traffic.conf. Under TRAFFIC/l2/ you will see srcmac and dstmac fields. Which are set to all zeroes.
  8. Set PM2 to srcmac and PM1 to dstmac.
  9. YOU SHOULD REVERT TO all-zeroes for NON-SRIOV tests.
  • Q5. What to check for on worker node during test run With VPP:
show interface : no tx errors and tx misses.
Inside the pod: No drastically uneven packet drops between two ports.

With OVS: You may see some connect reset when you start the pod. It should be fine.

show-stats.sh : no tx or rx drops for physical interface.
Inside the pod: No drastically uneven packet drops between two ports.
  • Q6. What other steps I should be aware of? Please do regular clean of hugepages (unreleased). run the command cleanup-hugepages.sh