Change in osmo-gsm-tester[master]: iperf3: Support using configuring UDP protocol

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pespin gerrit-no-reply at lists.osmocom.org
Fri May 22 12:58:26 UTC 2020


pespin has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-gsm-tester/+/18389 )

Change subject: iperf3: Support using configuring UDP protocol
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Patch Set 1:

> Patch Set 1:
> 
> > Patch Set 1:
> > 
> > > Patch Set 1:
> > > 
> > > tested this locally here and it works fine. only one more issue is that we need a way to specify the UDP bandwidth with the -b parameter. Otherwise only 1Mbit/s is generated.
> > 
> > Iwas unware of that param. So can you explain me how do you plan to use it? Shall I simply set it to a big value (which one?) and be done with it? Shall I allow it to be changed with a config option of iperf3?
> 
> No worries. I thought about passing it to the iperf client as parameter in prepare_test_proc(). Simply using "a large" number would work but has disadvantages. I think it is better to use the max_rate() from the eNB and then pass this as parameter. But it needs to be configurable because also max_rate only works for one UE.


from iperf3 man:
"""
  Setting the  target  bitrate  to  0  will disable bitrate limits (particularly useful for UDP tests).  This throughput limit is implemented internally inside iperf3, and is available on all platforms.  Compare with the --fq-rate flag.
"""

So I will pass -b 0 always for now, hope that makes sense as a first step, and we can improve it later if we see it causes issues.


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Gerrit-Project: osmo-gsm-tester
Gerrit-Branch: master
Gerrit-Change-Id: I0b3545847b01ae3d029881f243fea276f0fa39de
Gerrit-Change-Number: 18389
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: srs_andre <andre at softwareradiosystems.com>
Gerrit-Comment-Date: Fri, 22 May 2020 12:58:26 +0000
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