[ovs-dev] tests: Add new pmd test for pmd-rxq-affinity.

[Ilya Maximets]

Thanks for making this.

Acked-by: Ilya Maximets <i.maximets at samsung.com>

On 27.07.2016 23:12, Daniele Di Proietto wrote:
> This tests that the newly introduced pmd-rxq-affinity option works as
> intended, at least for a single port.
> 
> Signed-off-by: Daniele Di Proietto <diproiettod at vmware.com>
> ---
>  tests/pmd.at | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 53 insertions(+)
> 
> diff --git a/tests/pmd.at b/tests/pmd.at
> index 47639b6..3052f95 100644
> --- a/tests/pmd.at
> +++ b/tests/pmd.at
> @@ -461,3 +461,56 @@ icmp,vlan_tci=0x0000,dl_src=50:54:00:00:00:09,dl_dst=50:54:00:00:00:0a,nw_src=10
>  
>  OVS_VSWITCHD_STOP
>  AT_CLEANUP
> +
> +AT_SETUP([PMD - rxq affinity])
> +OVS_VSWITCHD_START(
> +  [], [], [], [--dummy-numa 0,0,0,0,0,0,0,0,0])
> +AT_CHECK([ovs-appctl vlog/set dpif:dbg dpif_netdev:dbg])
> +
> +AT_CHECK([ovs-ofctl add-flow br0 actions=controller])
> +
> +AT_CHECK([ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=1fe])
> +
> +AT_CHECK([ovs-vsctl add-port br0 p1 -- set Interface p1 type=dummy-pmd ofport_request=1 options:n_rxq=4 other_config:pmd-rxq-affinity="0:3,1:7,2:2,3:8"])
> +
> +dnl The rxqs should be on the requested cores.
> +AT_CHECK([ovs-appctl dpif-netdev/pmd-rxq-show | parse_pmd_rxq_show], [0], [dnl
> +p1 0 0 3
> +p1 1 0 7
> +p1 2 0 2
> +p1 3 0 8
> +])
> +
> +AT_CHECK([ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=6])
> +
> +dnl We removed the cores requested by some queues from pmd-cpu-mask.
> +dnl Those queues will not be polled.
> +AT_CHECK([ovs-appctl dpif-netdev/pmd-rxq-show | parse_pmd_rxq_show], [0], [dnl
> +p1 2 0 2
> +])
> +
> +AT_CHECK([ovs-vsctl remove Interface p1 other_config pmd-rxq-affinity])
> +
> +dnl We removed the rxq-affinity request.  dpif-netdev should assign queues
> +dnl in a round robin fashion.  We just make sure that every rxq is being
> +dnl polled again.
> +AT_CHECK([ovs-appctl dpif-netdev/pmd-rxq-show | parse_pmd_rxq_show | cut -f 1,2 -d ' ' | sort], [0], [dnl
> +p1 0
> +p1 1
> +p1 2
> +p1 3
> +])
> +
> +AT_CHECK([ovs-vsctl set Interface p1 other_config:pmd-rxq-affinity='0:1'])
> +
> +dnl We explicitly requested core 1 for queue 0.  Core 1 becomes isolated and
> +dnl every other queue goes to core 2.
> +AT_CHECK([ovs-appctl dpif-netdev/pmd-rxq-show | parse_pmd_rxq_show], [0], [dnl
> +p1 0 0 1
> +p1 1 0 2
> +p1 2 0 2
> +p1 3 0 2
> +])
> +
> +OVS_VSWITCHD_STOP(["/dpif_netdev|WARN|There is no PMD thread on core/d"])
> +AT_CLEANUP
>