[srslte-users] Throughput tests
dmakris at iit.demokritos.gr
dmakris at iit.demokritos.gr
Wed Feb 14 10:01:16 UTC 2018
Hi Kewin,
i tried to force the UE to download UDP packets with throughput 70 Mbps
through iperf3 Reverse Mode (-R). We have a lot of losses (lost packets).
I have attached the UE iperf3 output. Something maybe restricts the DL
throughput.
Best Regards,
Dimitris
> True, but bandwith from the client side is not reliable, because it just
> measure the performance of your driver or hardware (as far as i know).
>
> It does not take into account re-transmissions, lost or other kind of
> events. With wireless communication those ones shold be taken into
> account.
>
> On Feb 13, 2018 7:42 PM, "Ismael Gomez" <
> ismael.gomez at softwareradiosystems.com> wrote:
>
>> 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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>>>> > >> >> >> srslte-users at lists.softwareradiosystems.com <mailto:
>>>> srslte-users at lists.softwareradiosystems.com>
>>>> > >> >> >> http://www.softwareradiosystems.com/
>>>> mailman/listinfo/srslte-users <http://www.softwareradiosystems.com/
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>>>> > >> >> >>
>>>> > >> >> >
>>>> > >> >>
>>>> > >> >>
>>>> > >> >>
>>>> > >> >
>>>> > >>
>>>> > >>
>>>> > >>
>>>> > >
>>>> >
>>>> >
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>>
>
> --
> --
> Le informazioni contenute nella presente comunicazione sono di natura
> privata
> e come tali sono da considerarsi riservate ed indirizzate esclusivamente
> ai
> destinatari indicati e per le finalità strettamente legate al relativo
> contenuto. Se avete ricevuto questo messaggio per errore, vi preghiamo di
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> mittente.
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