Table of Contents

 

Introduction

The R4 release will evaluate the conntrack performance of Open vSwitch (OVS).

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We will compare the performance of an optimized software based OVS with the performance of the OVS running on a MLNX SmartNIC with hardware offload enabled.

Akraino Test Group Information

SmartNIC deployed Architecture

We reuse the test architecture for smart NIC in R3 release. The below description is the same with the R3 release test documents.

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We use Ansible to automatically setup the filesystem image and install the OVS-DPDK in the SmartNICs.

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The File Server is a simple Nginx based web server where stores the BF drivers, FS image.

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OVS-DPDK Test Architecture

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OVS-DPDK on BlueField Test Architecture

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The testbed setup is shown in the above diagram. DUT stands for Device Under Test

Test Framework

The software used and the OVS-DPDK setup is shown below.

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root:/home/ovs-dpdk# ovs-vsctl --format=csv --data=bare --no-headings --column=other_config list open_vswitch
dpdk-extra="-w 0000:03:00.0,representor=[0-1],dv_xmeta_en=1,sys_mem_en=1", dpdk-init="true", dpdk-socket-mem="4096", hw-offload="true", max-idle="120000"

Traffic Generator

We will use DPDK pktgen as the Traffic Generator.

CT Ruleset

Br-ex rules
table=0 priority=300 in_port=eth2,tcp,tp_dst=32768/0x8000 actions=output:br-int-patch
table=0 priority=300 in_port=eth2,udp,tp_dst=32768/0x8000 actions=output:br-int-patch
table=0 priority=200 in_port=eth2 actions=output:LOCAL
table=0 priority=200 in_port=LOCAL actions=eth2
table=0 priority=200 in_port=br-int-patch actions=eth2

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Br-int rules
table=0,arp,action=normal
table=1,priority=1,ip,ct_state=+trk+new,action=ct(commit),normal
table=0,ip,ct_state=-trk,action=ct(table=1)
table=1,priority=1,ip,ct_state=+trk+est,action=normal

Nginx configuration

user  nginx;
worker_processes  auto;
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;
events {
    worker_connections  2000000;
}
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                  '$status $body_bytes_sent "$http_referer" '
                  '"$http_user_agent" "$http_x_forwarded_for"';
    access_log off;
    sendfile        on;
    keepalive_timeout  65;
    include /etc/nginx/conf.d/*.conf;
}

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./wrk -t 32 -c 640 -d30s http://10.0.1.127/ -H "Connection: Close"

Performance Results

For the optimized software-based OVS, we tested on a 48C24q VM, running NGINX as a server, CT is enabled on OVS-DPDK.( upstream version / our version )

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Note: the result also depends on the traffic generator side.

The test is to evaluate the performance of SmartNIC offloading.
Test API description

Thus we currently don't have any Test APIs provided.

Test Dashboards 

Functional Tests

Open vSwitch itself contains a test suite for functional test, the link is http://docs.openvswitch.org/en/latest/topics/testing/

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25 cases are skipped due to the configuration. 

Additional Testing

n/a

Bottlenecks/Errata 

n/a