[srslte-users] srsLTE/srsUE with Commercial Cell => Segmentation Fault

David Rupprecht david.rupprecht at rub.de
Tue Nov 29 12:48:10 UTC 2016


Hello Ismael,

Thanks for your reply. Do you mean the tool benchmark_rate by the uhd
framework? Which parameter would cause a sufficient test for srsLTE?

Best Regards,
David

On 29.11.2016 11:51, Ismael Gomez wrote:
> Hi, 
> 
> Yes it looks like this is some problem with the UHD IO. Have you tried
> running a the UHD benchmark IO tool? 
> 
> BR
> Ismael
> 
> On Tue, 29 Nov 2016 at 11:43 David Rupprecht <david.rupprecht at rub.de
> <mailto:david.rupprecht at rub.de>> wrote:
> 
>     Dear all,
> 
>     I try to connect srsUE with a commercial cell in Germany (100 PRB).
>     Unfortunately, srsUE breaks while setting up a radio connection with:
> 
>     Error sending to UHD: 30
>     Error sending to UHD: 30
>     Random Access Transmission: seq=1, ra-rnti=2
>     Error sending to UHD: 30
>     Error sending to UHD: 30
>     Error sending to UHD: 30
>     Random Access Transmission: seq=2, ra-rnti=2
>     Sync error.
>     Segmentation fault (core dumped)
> 
>     Because of the seg fault, srsUE does not provide any log file.
>     Looking in the core dump, showes it always fails when calling
>     srsue::phch_common::reset_ul. My guess is that it tries to unlock a
>     mutex which is not locked (_xend () at
>     ../sysdeps/unix/sysv/linux/x86/elision-unlock.c:33). However, looking
>     the mutex before does not help any further as it can not lock the mutex.
> 
>     void phch_common::reset_ul()
>     {
>       for (int i=0;i<nof_mutex;i++) {
>         pthread_mutex_lock(&tx_mutex[i]);
>       }
>       is_first_tx = true;
>       is_first_of_burst = true;
>       for (int i=0;i<nof_mutex;i++) {
>         pthread_mutex_unlock(&tx_mutex[i]);
>       }
>     }
> 
> 
>     Do you have any suggestions how I can fix the issue of Segfault, Sync
>     error, and UHD IO error?
> 
>     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 <tel:+49%20234%203223508>
>     Web: www.infsec.rub.de <http://www.infsec.rub.de>
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> 

-- 
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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