Thanks, let me evaluate this

Bob

On Fri, Jan 24, 2020, 1:25 PM Toke Høiland-Jørgensen <toke@redhat.com>
wrote:

> Bob McMahon via Make-wifi-fast <make-wifi-fast@lists.bufferbloat.net>
> writes:
>
> > From: Bob McMahon <bob.mcmahon@broadcom.com>
> > Subject: iperf 2.0.14
> > To: Make-Wifi-fast <make-wifi-fast@lists.bufferbloat.net>
> > Date: Fri, 24 Jan 2020 12:52:16 -0800
> >
> > Hi All,
> >
> > Just a heads up that iperf 2.0.14 <
> https://sourceforge.net/projects/iperf2/>
> > is getting closer to a release. Feel free to suggest features that you
> > might find helpful.
>
> I have an old TODO item sitting around telling me to go over which
> features we use from netperf in Flent that we don't currently use for
> iperf. So thank you for the reminder; since I'm leaving for holidays
> tomorrow, here is a quick overview (i.e., I haven't had time to go over
> how many of these are actually missing from iperf, and how many are
> there, but we're just not using them):
>
> - We extract the following variables from netperf (-k option):
>
>     output_vars = 'THROUGHPUT,LOCAL_CONG_CONTROL,REMOTE_CONG_CONTROL,' \
>                   'TRANSPORT_MSS,LOCAL_TRANSPORT_RETRANS,' \
>                   'REMOTE_TRANSPORT_RETRANS,LOCAL_SOCKET_TOS,' \
>                   'REMOTE_SOCKET_TOS,DIRECTION,ELAPSED_TIME,PROTOCOL,' \
>                   'LOCAL_SEND_SIZE,LOCAL_RECV_SIZE,' \
>                   'REMOTE_SEND_SIZE,REMOTE_RECV_SIZE,' \
>                   'LOCAL_BYTES_SENT,LOCAL_BYTES_RECVD,' \
>                   'REMOTE_BYTES_SENT,REMOTE_BYTES_RECVD'
>
> - We pass in DUMP_TCP_INFO to netperf and capture the output (ref:
>   https://github.com/tohojo/flent/issues/13)
>
> - We use the netperf features to set:
>   - diffserv markings
>   - TCP congestion control
>   - socket timeout
>
> - For running the public test servers, the ability to just leave a
>   'netserver' instance running indefinitely and let it take care of
>   negotiating test setups. I don't think this works that well with
>   iperf?
>
>
>
> If iperf can replicate all of that, it'll be fairly straight-forward to
> make Flent backend-agnostic on the TCP test runner front. How much do
> you reckon is currently missing, and what would it take to get that in? :)
>
> -Toke
>
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