[srslte-users] ZMQ performance issues?

[David Rupprecht]

Dear all,

I have just tested the ZMQ testing environment. Particularly, I run the
./test/run_lte.sh script with the parameters "../build_release/ 25"
(with sudo) on my Ubuntu18.04 with a i7-7820. I'm on the latest commit
(master) and build it srsLTE in release mode. However, while running the
script I got some performance and general errors. To understand the
problems and I got some general questions to check my configuration. I
also attached the logs.

First of all, the script detects multiple PRACHs: "Error. Detected 5
PRACH(s). But should be only 1." While in this test run only have 5
PRACH(s) occured, other test runs contain up to 10 PRACH(s). Should it
be exact one PRACH? The eNodeB detects 4 times : [RRC ] [W] Activity
timer for rnti=0x46 expired after 5000 ms. However, there is a sleep
between ping and iperf which should trigger the inactivity timer.
Nevertheless, there shall be only 2 times triggered. What many PRACH
does occur

Further, the UE has some problems with the detects some slow task "[W]
Detected slow task processing". When I run the srsUE with a USRP this
does not occur. Is this a known problem when using ZMQ or srsUE and
srsENB on the same machine? Do you see similar warnings with the
run_lte.sh script?

Further, the 165 Kbits/sec seems a bit slow for a 25PRB setup. Are those
parameters in the normal range?

Thanks and best regards,
David
-- 
M.Sc. David Rupprecht

Ruhr-University Bochum
Research Group Information Security
Universitätsstraße 150
ID 2/130
44780 Bochum / Germany

Phone: +49 234 / 32 - 23508
Web: www.infsec.rub.de
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