On Fri, Feb 16, 2018 at 8:33 AM, Neal Cardwell <ncardw...@google.com> wrote:
> Oleksandr,
>
> Thanks for the detailed report! Yes, this sounds like an issue in BBR. We
> have not run into this one in our team, but we will try to work with you to
> fix this.
>
> Would you be able to take a sender-side tcpdump trace of the slow BBR
> transfer ("v4.13 + BBR + fq_codel == Not OK")? Packet headers only would be
> fine. Maybe something like:
>
> tcpdump -w /tmp/test.pcap -c1000000 -s 100 -i eth0 port $PORT
>
> Thanks!
> neal
On baremetal and using latest net tree, I get pretty normal results at
least, on 40Gbit NIC,
with pfifo_fast, fq and fq_codel.
# tc qd replace dev eth0 root fq
# ./super_netperf 1 -H lpaa24 -- -K cubic
25627
# ./super_netperf 1 -H lpaa24 -- -K bbr
25897
# tc qd replace dev eth0 root fq_codel
# ./super_netperf 1 -H lpaa24 -- -K cubic
22246
# ./super_netperf 1 -H lpaa24 -- -K bbr
25228
# tc qd replace dev eth0 root pfifo_fast
# ./super_netperf 1 -H lpaa24 -- -K cubic
25454
# ./super_netperf 1 -H lpaa24 -- -K bbr
25508
