[ovs-build] Failed: yyang13/ovs#1 (master - b7b1bff)

[Travis CI]

Build Update for yyang13/ovs
-------------------------------------

Build: #1
Status: Failed

Duration: 35 mins and 17 secs
Commit: b7b1bff (master)
Author: Yi Yang
Message: Use TPACKET_V3 to accelerate veth for userspace datapath

We can avoid high system call overhead by using TPACKET_V3
and using DPDK-like poll to receive and send packets (Note: send
still needs to call sendto to trigger final packet transmission).

>From Linux kernel 3.10 on, TPACKET_V3 has been supported,
so all the Linux kernels current OVS supports can run
TPACKET_V3 without any problem.

I can see about 30% performance improvement for veth compared to
last recvmmsg optimization if I use TPACKET_V3, it is about 1.98
Gbps, but it was 1.47 Gbps before.

Note: Linux kernel TPACKET_V3 can't support TSO, so the performance
is very poor, please turn off tso for veth interfces in case
userspace-tso-enable is set to true.

Signed-off-by: Yi Yang <yangyi01 at inspur.com>
Co-authored-by: William Tu <u9012063 at gmail.com>
Signed-off-by: William Tu <u9012063 at gmail.com>

View the changeset: https://github.com/yyang13/ovs/compare/ac23d20fc90d...b7b1bffc2727

View the full build log and details: https://travis-ci.org/yyang13/ovs/builds/652282524?utm_medium=notification&utm_source=email

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