[vpp-dev] Performance degradation when creating large amount of Data-Path Objects (DPO)

[Krzysztof Sinica via lists.fd.io]

Hello,

I’m working on a project that involves the creation of thousands of GTPU
tunnels. We are having issues related to VPP performance in regard to the
gradual degradation of creation performance in relation to the tunnel
count. That behavior can be observed in general, when creating other kinds
of Data-Path Objects. Minimal reproduction steps:

➜  ~ cat vpp.conf

unix {

    nodaemon

    cli-listen /run/vpp/cli.sock

}

dpdk {

    no-hugetlb

}

➜  ~ docker run --rm -v $(pwd)/vpp.conf:/etc/vpp/startup.conf
ligato/vpp-base:master

root@69cd261996f0:/vpp# time for i in $(seq 1000); do vppctl create
loopback interface >/dev/null; done

real 0m1.208s

user 0m0.012s

sys 0m0.088s

root@69cd261996f0:/vpp# time for i in $(seq 1000); do vppctl create
loopback interface >/dev/null; done

real 0m2.028s

user 0m0.012s

sys 0m0.104s

root@69cd261996f0:/vpp# time for i in $(seq 1000); do vppctl create
loopback interface >/dev/null; done

real 0m2.926s

user 0m0.028s

sys 0m0.100s

root@69cd261996f0:/vpp# time for i in $(seq 1000); do vppctl create
loopback interface >/dev/null; done

real 0m4.235s

user 0m0.036s

sys 0m0.108s

Is this kind of performance degradation a known behavior? If so, are there
any known means of making the creation time more linear?


Best regards,

Krzysztof Sinica

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