> Hi All,
> I want to test some changes done for OVS-DPDK.
> I am able to run make check-dpdk , but I guess that is enough as I see that 
> test may not exercise the code path that I have changed.
> On  reading Testing - Open vSwitch 2.17.90 
> documentation<https://docs.openvswitch.org/en/latest/topics/testing/>, I get 
> a feeling I can get userspace netdev  tested by running "make 
> check-system-userspace"
> 
> I am running this on my development machine, I think Vagrant with centos was 
> complaining the same.
> 
> This is what I see in the logs when I run
> "make check-system-userspace TESTSUITEFLAGS='-k datapath' TESTSUITEFLAGS='1'"
> 
> 
> Log file:
> =========
> ## ---------------------- ##
> ## Detailed failed tests. ##
> ## ---------------------- ##
> 
> #                             -*- compilation -*-
> 1. system-traffic.at:3: testing datapath - ping between two ports ...
> system-traffic.at:4: waiting while ip link show ovs-netdev...
> Device "ovs-netdev" does not exist.
> system-traffic.at:4: wait succeeded immediately
> ./system-traffic.at:4: ovsdb-tool create conf.db 
> $abs_top_srcdir/vswitchd/vswitch.ovsschema
> ./system-traffic.at:4: ovsdb-server --detach --no-chdir --pidfile --log-file 
> --remote=punix:$OVS_RUNDIR/db.sock
> stderr:
> 2022-02-11T23:53:35Z|00001|vlog|INFO|opened log file 
> /usr/src/ovs/tests/system-userspace-testsuite.dir/001/ovsdb-server.log
> ./system-traffic.at:4: sed < stderr '
> /vlog|INFO|opened log file/d
> /ovsdb_server|INFO|ovsdb-server (Open vSwitch)/d'
> ./system-traffic.at:4: ovs-vsctl --no-wait init
> ./system-traffic.at:4: ovs-vswitchd --disable-system --detach --no-chdir 
> --pidfile --log-file -vvconn -vofproto_dpif -vunixctl
> stderr:
> 2022-02-11T23:53:35Z|00001|vlog|INFO|opened log file 
> /usr/src/ovs/tests/system-userspace-testsuite.dir/001/ovs-vswitchd.log
> 2022-02-11T23:53:35Z|00002|ovs_numa|INFO|Discovered 16 CPU cores on NUMA node > 0
> 2022-02-11T23:53:35Z|00003|ovs_numa|INFO|Discovered 1 NUMA nodes and 16 CPU 
> cores
> 2022-02-11T23:53:35Z|00004|reconnect|INFO|unix:/usr/src/ovs/tests/system-userspace-testsuite.dir/001/db.sock:
>  connecting...
> 2022-02-11T23:53:35Z|00005|reconnect|INFO|unix:/usr/src/ovs/tests/system-userspace-testsuite.dir/001/db.sock:
>  connected
> 2022-02-11T23:53:35Z|00006|dpdk|INFO|DPDK Disabled - Use 
> other_config:dpdk-init to enable
> 2022-02-11T23:53:35Z|00007|dpif_netlink|INFO|The kernel module does not 
> support meters.
> ./system-traffic.at:4: sed < stderr '
> /ovs_numa|INFO|Discovered /d
> /vlog|INFO|opened log file/d
> /vswitchd|INFO|ovs-vswitchd (Open vSwitch)/d
> /reconnect|INFO|/d
> /dpif_netlink|INFO|Generic Netlink family .ovs_datapath. does not exist/d
> /ofproto|INFO|using datapath ID/d
> /netdev_linux|INFO|.*device has unknown hardware address family/d
> /ofproto|INFO|datapath ID changed to fedcba9876543210/d
> /dpdk|INFO|DPDK Disabled - Use other_config:dpdk-init to enable/d
> /netlink_socket|INFO|netlink: could not enable listening to all nsid/d
> /probe tc:/d
> /tc: Using policy/d'
> --- /dev/null   2022-02-08 12:38:20.944991451 -0800
> +++ /usr/src/ovs/tests/system-userspace-testsuite.dir/at-groups/1/stdout    
> 2022-02-11 15:53:35.455808528 -0800
> @@ -0,0 +1 @@
> +2022-02-11T23:53:35Z|00007|dpif_netlink|INFO|The kernel module does not 
> support meters.
> ovsdb-server.log:
>> 2022-02-11T23:53:35.384Z|00001|vlog|INFO|opened log file 
>> /usr/src/ovs/tests/system-userspace-testsuite.dir/001/ovsdb-server.log
>> 2022-02-11T23:53:35.396Z|00002|ovsdb_server|INFO|ovsdb-server (Open vSwitch) 
>> 2.16.2
> ovs-vswitchd.log:
>> 2022-02-11T23:53:35.422Z|00001|vlog|INFO|opened log file 
>> /usr/src/ovs/tests/system-userspace-testsuite.dir/001/ovs-vswitchd.log
>> 2022-02-11T23:53:35.426Z|00002|ovs_numa|INFO|Discovered 16 CPU cores on NUMA 
>> node 0
>> 2022-02-11T23:53:35.426Z|00003|ovs_numa|INFO|Discovered 1 NUMA nodes and 16 
>> CPU cores
>> 2022-02-11T23:53:35.426Z|00004|reconnect|INFO|unix:/usr/src/ovs/tests/system-userspace-testsuite.dir/001/db.sock:
>>  connecting...
>> 2022-02-11T23:53:35.426Z|00005|reconnect|INFO|unix:/usr/src/ovs/tests/system-userspace-testsuite.dir/001/db.sock:
>>  connected
>> 2022-02-11T23:53:35.430Z|00006|dpdk|INFO|DPDK Disabled - Use 
>> other_config:dpdk-init to enable
>> 2022-02-11T23:53:35.434Z|00007|dpif_netlink|INFO|The kernel module does not 
>> support meters.
>> 2022-02-11T23:53:35.441Z|00008|bridge|INFO|ovs-vswitchd (Open vSwitch) 2.16.2
> 1. system-traffic.at:3: 1. datapath - ping between two ports 
> (system-traffic.at:3): FAILED (system-traffic.at:4)
> 
> I noticed that when the test was running, I really don't see the ovs-netdev 
> interface, is that the reason why it fails?

It fails because it finds unexpected log message in the stderr.
Apparently, you're running a fairly old kernel that doesn't have
support for meters.

> if so, can someone please let me know how to fix this and run unit tests for 
> DPDK/Userspace?

You may either upgrade your kernel to 4.15+ or simply add the
warning to the ignore list:

diff --git a/tests/ofproto-macros.at b/tests/ofproto-macros.at
index 736d9809c..9233aa468 100644
--- a/tests/ofproto-macros.at
+++ b/tests/ofproto-macros.at
@@ -174,6 +174,7 @@ m4_define([_OVS_VSWITCHD_START],
 /ofproto|INFO|datapath ID changed to fedcba9876543210/d
 /dpdk|INFO|DPDK Disabled - Use other_config:dpdk-init to enable/d
 /netlink_socket|INFO|netlink: could not enable listening to all nsid/d
+/dpif_netlink|INFO|The kernel module does not support meters./d
 /probe tc:/d
 /tc: Using policy/d']])
 ])
---

Best regards, Ilya Maximets.
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