[Cake] cake flenter results round 2

[Dave Taht]

the astounding figure is dropping ~70% of all packets, and tcp still
works at all.

682411 pkt (dropped 1511579 ...)

is your 2nd result repeatable? What happens with just "ack-filter" not
aggressive?

I keep thinking that a way to coax more performance out of 40GigE+
might be to drop more acks (as correctly as possible) before they even
hit the server.


On Tue, Nov 28, 2017 at 7:29 PM, Georgios Amanakis <gamanakis at gmail.com> wrote:
> I just ran some rrul tests, but I am getting a strange behaviour.
> Setup:
> server        --        delay        --        mbox        --        client
> netserver         50ms/50ms         45/900mbit
>
> cli:
> https://drive.google.com/open?id=10CwMwLItL6bVSyMTp8-kVXWuFBAG6ft2
> 1) ./vsetup.sh (includes vcake.sh)
> 2) ip netns exec server netserver
> 3) ip netns exec client flent ....
>
> rrul1 flent:
> https://drive.google.com/open?id=1XB1k68fv4PCsRhSbmbCMvqOLk7Dv08bh
> rrul1 tc qdisc show:
> https://drive.google.com/open?id=1mKEYq7iDauOL5A9lCat_jAUgE7Eq6et8
>
> rrul2 flent:
> https://drive.google.com/open?id=19OhJdOtMLcsNM66Jy-Edn7rD8TC9WelJ
> rrul2 tc qdisc show:
> https://drive.google.com/open?id=1HtgjwvmTbr7XQKRp4XOqVvkz8FzCxdTk
>
> rrul1 looks good, while rrul2 has a very strange trace. Look at the
> upload/ping. The setup was exactly the same between these two. If I lower
> the mbox bandwidth to 10/200mbit I don't get this behaviour anymore, the
> traces look like rrul1.
>
> Am I doing something wrong?
>
> George
>
> On Tue, Nov 28, 2017 at 7:20 PM, Georgios Amanakis <gamanakis at gmail.com>
> wrote:
>>
>>
>>
>> I got Dave's netns scripts working on my server. Will try to run rrul
>> tests on a 200/10mbit tonight.
>>
>> George
>>
>> On Nov 28, 2017 7:16 PM, "Pete Heist" <peteheist at gmail.com> wrote:
>>>
>>>
>>> > On Nov 28, 2017, at 11:52 PM, Dave Taht <dave at taht.net> wrote:
>>> >
>>> > A diffserv 200Mbit result would be good.
>>> >
>>> > We are utterly out of cpu at 900mbits here.
>>> >
>>> > <not_winning_on_cpu.png>
>>>
>>> Wow, I see flent’s combination plots are handy though.
>>>
>>> Stuff to sort in irtt also. Merely setting the source IP of an outgoing
>>> packet doubles allocated heap when it calls into x/net code. Super.
>>>
>>> Ok, here’s a quick veth try but I gotta get to sleep so I’m not
>>> investigating much ’til later. I wonder if 4.9.0-4 is enough:
>>>
>>> root at apu2a:/home/sysadmin/src/veth# cat settings.example
>>> export HOSTS="server client delay mbox"
>>>
>>> # I’ve been a bad boy and did sudo make install in iproute2-cake-next
>>> export TC=/sbin/tc
>>> root at apu2a:/home/sysadmin/src/veth# ./vsetup.sh
>>> Cannot remove namespace file "/var/run/netns/server": No such file or
>>> directory
>>> Cannot remove namespace file "/var/run/netns/client": No such file or
>>> directory
>>> Cannot remove namespace file "/var/run/netns/delay": No such file or
>>> directory
>>> Cannot remove namespace file "/var/run/netns/mbox": No such file or
>>> directory
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> RTNETLINK answers: File exists
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> net.ipv4.ip_forward = 1
>>> net.ipv6.conf.all.forwarding = 1
>>> root at apu2a:/home/sysadmin/src/veth# ./vcake.sh
>>> root at apu2a:/home/sysadmin/src/veth# ip netns exec server flent -H
>>> 10.10.2.2 rrul_be
>>> Started Flent 1.1.1-git-5daa2b3 using Python 2.7.13.
>>> Starting rrul_be test. Expected run time: 70 seconds.
>>> WARNING: Program exited non-zero.
>>> Runner class: NetperfDemoRunner
>>> Command: /usr/bin/netperf -P 0 -v 0 -D -0.20 -4 -Y CS0,CS0 -H 10.10.2.2
>>> -p 12865 -t UDP_RR -l 70 -F /dev/urandom    --   -H 10.10.2.2 -k
>>> 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
>>> Return code: 255
>>> Stdout: establish control: are you sure there is a netserver listening on
>>> 10.10.2.2 at port 12865?
>>> establish_control could not establish the control connection from 0.0.0.0
>>> port 0 address family AF_INET to 10.10.2.2 port 12865 address family AF_INET
>>>
>>> ...
>>> _______________________________________________
>>> Cake mailing list
>>> Cake at lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/cake
>>
>>
>
>
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>



-- 

Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619