[srslte-users] Throughput tests

Tue Feb 13 18:42:41 UTC 2018

Actually with iperf(2) you dont really need a server endpoint. UDP is
connection-less

El mar., 13 feb. 2018 19:34, Kewin Rausch <krausch at fbk.eu> escribió:

> Whoops, I was stuck with the Iperf(2) question.
>
> On Feb 13, 2018 7:30 PM, "Cedric Roux" <Cedric.Roux at eurecom.fr> wrote:
>
>> iperf3 is different :)
>>
>> On 02/13/2018 07:06 PM, Kewin Rausch wrote:
>> > Ehm.... actually for an UDP server you should run:
>> >
>> > iperf -s -u
>> >
>> > Otherwise iperf runs a TCP server (the log on the console should report
>> it).
>> >
>> > Usually looking at the help (--help) or at online tutorials is a good
>> start; try googling it.
>> >
>> > Kewin
>> >
>> > On Feb 13, 2018 6:52 PM, <dmakris at iit.demokritos.gr <mailto:
>> dmakris at iit.demokritos.gr>> wrote:
>> >
>> >     Hi Ismael,
>> >
>> >     I run the iperf client from EPC, but the Smartphone does not
>> answers, as a
>> >     server.
>> >     On the other hand, i use iperf3 server in EPC (iperf3 -s), and on
>> the
>> >     smarthpone the iperf3 client(-c 192.168.3.1 -t 1000 -u -R). The R,
>> means
>> >     the reverse mode. So the UE, downloads UDP packets. I set the
>> bandwidth 75
>> >     Mbps (-b 75m), but the DL throughput is only 11 Mbps.
>> >
>> >     Best regards,
>> >     Dimitris
>> >
>> >     > run the following command from EPC (amarisoft) server:
>> >     >
>> >     > iperf -c 192.168.3.2 -b75M -t100 -u
>> >     >
>> >     > to run a DL iperf and to run UL iperf:
>> >     >
>> >     > iperf -c 192.168.3.1 -b30M -t100 -u
>> >     >
>> >     >
>> >     > On Tue, 13 Feb 2018 at 10:44 <dmakris at iit.demokritos.gr <mailto:
>> dmakris at iit.demokritos.gr>> wrote:
>> >     >
>> >     >> Hi Ismael,
>> >     >>
>> >     >> i use in the smartphone (client) the following:
>> >     >> -c 192.168.3.1 -t 1000 -u -R.
>> >     >> In the EPC (Amarisoft) runs the iperf -s (server).
>> >     >>
>> >     >> Best Regards,
>> >     >> Dimitris
>> >     >>
>> >     >> > what command do you use for UDP iperf?
>> >     >> >
>> >     >> > On Tue, 13 Feb 2018 at 10:34 <dmakris at iit.demokritos.gr
>> <mailto:dmakris at iit.demokritos.gr>> wrote:
>> >     >> >
>> >     >> >> Hi Ismael,
>> >     >> >>
>> >     >> >> thank you for your immediate response.
>> >     >> >> I tune the Tx and Rx gains to 88 and 45 dB respectively, so
>> the snr
>> >     >> from
>> >     >> >> trace monitoring is about 27 dB.
>> >     >> >> I run the tests using speedtest from Okla, and i measure the
>> DL
>> >     >> between
>> >     >> >> 12
>> >     >> >> and 20 Mbps. The UL is about 25 Mbps.
>> >     >> >> Then i run an iperf UDP test. When i try to download, the DL
>> is about
>> >     >> 10
>> >     >> >> Mbps and the snr goes to -nan.
>> >     >> >>
>> >     >> >> Best Regards,
>> >     >> >> Dimitris
>> >     >> >>
>> >     >> >>
>> >     >> >> > Are you using TCP or UDP? TCP performance with srsENB is
>> not quite
>> >     >> >> good
>> >     >> >> at
>> >     >> >> > the moment. Try UDP first.
>> >     >> >> >
>> >     >> >> > Also tune the TX and RX gains so that you have high SNR
>> (~27-30 dB)
>> >     >> in
>> >     >> >> > both
>> >     >> >> > directions.
>> >     >> >> >
>> >     >> >> > On Tue, 13 Feb 2018 at 10:17 <dmakris at iit.demokritos.gr
>> <mailto:dmakris at iit.demokritos.gr>> wrote:
>> >     >> >> >
>> >     >> >> >> Hi srsLTE community,
>> >     >> >> >>
>> >     >> >> >>  in our testbed, we use the latest srsLTE software (Latest
>> commit
>> >     >> >> >> 2734ce6)
>> >     >> >> >> running on an Intel Core i7-7700K CPU (8x4.2 GHz), with 16
>> Gbyte
>> >     >> RAM.
>> >     >> >> >> The
>> >     >> >> >> OS is Ubuntu 16.04. For the RF front end we use the Ettus
>> B210 in
>> >     >> >> SISO
>> >     >> >> >> Mode.
>> >     >> >> >>  For 1.4, 3, 5 and 10 MHz Bandwidth, we achieve the
>> expected
>> >     >> >> throughput.
>> >     >> >> >> But for 15 and 20 MHz, the DL varies between 12 and 20
>> Mbps. The
>> >     >> UL
>> >     >> >> is
>> >     >> >> >> about 25 Mbps.
>> >     >> >> >>
>> >     >> >> >>  Should we change another parameter from drb, rr, or sib
>> >     >> >> configuration
>> >     >> >> >> files?
>> >     >> >> >> Thank you for your help.
>> >     >> >> >>
>> >     >> >> >> Thank you in advance,
>> >     >> >> >> Dimitris
>> >     >> >> >>
>> >     >> >> >> _______________________________________________
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>> >     >> >> >>
>> >     >> >> >
>> >     >> >>
>> >     >> >>
>> >     >> >>
>> >     >> >
>> >     >>
>> >     >>
>> >     >>
>> >     >
>> >
>> >
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