On Fri, Feb 16, 2018 at 11:43 AM, Eric Dumazet <eduma...@google.com> wrote:
>
> 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,
Eric raises a good question: bare metal vs VMs.
Oleksandr, your first email mentioned KVM VMs and virtio NICs. Your
second e-mail did not seem to mention if those results were for bare
metal or a VM scenario: can you please clarify the details on your
second set of tests?
Thanks!
