[srslte-users] Error - buffer pool is empty

[Joel]

Hi,

Just would like to ask if someone has encountered this error:  Error - buffer pool is empty

If it occurs at PRB’s of 25, 50, and 75, sometime it can be resolved by connecting the B210 to a different USB port.  However we cannot make PRB = 100 (20 MHz) work even if we transfer USB connections.  Thus, we can’t test the throughput at 20 MHz.  More details are below.

Will appreciate if someone can help me resolve this problem.

Thanks,
Joel C. Delos Angeles
Manager, Hardware Engineering
Entropy Solution Inc
https://www.entropyph.com/



root at oai-enb:~# sudo srsenb
---  Software Radio Systems LTE eNodeB  ---

Reading configuration file /root/.config/srslte/enb.conf...

Built in Release mode using commit c892ae5 on branch master.

/root/srsLTE/srsenb/src/enb_cfg_parser.cc.883: Force DL EARFCN for cell PCI=1 to 1850

Opening 2 channels in RF device=default with args=default
[INFO] [UHD] linux; GNU C++ version 5.4.0 20160609; Boost_105800; UHD_3.15.0.0-release
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=2, args: type=b200,master_clock_rate=23.04e6
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Detecting internal GPSDO....
[INFO] [GPS] Found an internal GPSDO: GPSTCXO , Firmware Rev 0.929a
[WARNING] [GPS] update_cache: Malformed GPSDO string: GPSTCXO , Firmware Rev 0.929a
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Asking for clock rate 23.040000 MHz...
[INFO] [B200] Actually got clock rate 23.040000 MHz.
[INFO] [MULTI_USRP]     1) catch time transition at pps edge
[INFO] [MULTI_USRP]     2) set times next pps (synchronously)
Setting frequency: DL=1870.0 Mhz, UL=1775.0 MHz for cc_idx=0

==== eNodeB started ===
Type <t> to view trace
RACH:  tti=8521, preamble=3, offset=1, temp_crnti=0x46
RACH:  tti=8611, preamble=18, offset=1, temp_crnti=0x47
RACH:  tti=8701, preamble=40, offset=1, temp_crnti=0x48
Disconnecting rnti=0x48.
SCHED: Could not transmit RAR within the window (RA TTI=8701, Window=10, Now=8715)
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty
Error - buffer pool is empty


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