LimeSuiteNG, Sporadic warnings at runtime

Projects Lime Suite
1

Hello,

I’m using LimeSuiteNG with SDR LimeMini2.2 and GnuRadio
(I installed it, see post
GnuRadio_3.11 with LimeSuiteNG_0.3.0 on Ubuntu_2025.10 )

Now, on a GnuRadio application, I get sporadic
warning massages like this:

LimeSuiteNG :warning: USB ep:83 Rx0: 7.705 MB/s | TS:6874335900 pkt:6739019 o:0(+0) l:241(+1) dma:6739019/6739035(+16) swFIFO:0
LimeSuiteNG :warning: USB ep:83 Rx0: 7.684 MB/s | TS:6876266760 pkt:6740907 o:0(+0) l:244(+3) dma:6740907/6740911(+4) swFIFO:0
LimeSuiteNG :warning: USB ep:83 Rx0: 7.636 MB/s | TS:6951231660 pkt:6814382 o:0(+0) l:256(+12) dma:6814382/6814387(+5) swFIFO:0
LimeSuiteNG :warning: USB ep:83 Rx0: 7.713 MB/s | TS:6993515760 pkt:6855836 o:0(+0) l:257(+1) dma:6855836/6855837(+1) swFIFO:0
LimeSuiteNG :warning: USB ep:83 Rx0: 7.709 MB/s | TS:7056891420 pkt:6917968 o:0(+0) l:258(+1) dma:6917968/6917983(+15) swFIFO:0
LimeSuiteNG :warning: USB ep:83 Rx0: 7.700 MB/s | TS:7091497980 pkt:6951892 o:0(+0) l:260(+2) dma:6951892/6951893(+1) swFIFO:0

It seems to be some lost/difference of data-samples.
Has everybody an idea what goes wrong and how can I fix it?

Thanks

2

Hi, the loss counter indicates that the data was lost in USB layer, perhaps due to CPU load, the usb processing thread did not collect it fast enough, and the hardware had to drop some packets.
Maybe increasing the USB data transfer batch size could help, like it did here: LimeMini Maximum stable USB3 Rate? - #13 by oe1rsa

For gnuradio plugin you can modify it here: LimeSuiteNG/plugins/gr-limesuiteng/lib/sdrdevice_block_base.cc at a580f9cbc7bec9478ac08d93513690714a1753dd · myriadrf/LimeSuiteNG · GitHub

3

Hello,

the change in the <sdrdevice_block_base.cc> was already on my system
because I installed it from git after your modification.

But what I not found is the
mRx.packetsToBatch == 1
strcfg.extraConfig.rx.packetsInBatch = x
from #13 by oe1rsa

I want to change that and test it with GnuRadio.

4

it’s an optional argument, you can add it in that source location:

devContext->streamCfg.extraConfig.rx.packetsInBatch = 8;
5

Hello,

I have testet GnuRadio on my system with some parameter of
strcfg.extraConfig.rx.packetsInBatch = x
and here is the result:

PacketsToBatch
PacketsToBatch776×749 130 KB

As you can see for x>=3 there are no warnings.
Therefore, this is my choose.

Many thanks again for your help