Dear Community, Thank you for your suggestions and information. I will give all of it a try!
I really appreciate the spirit of this mailing list! Best regards, Anton ________________________________________ Von: Discuss-gnuradio <discuss-gnuradio-bounces+anton.dobler=unibw...@gnu.org> im Auftrag von Johannes Demel <de...@ant.uni-bremen.de> Gesendet: Freitag, 6. Mai 2022 09:01 An: discuss-gnuradio@gnu.org Betreff: Re: Realtime Kernel, UHD 4.0, GNURadio Hi Anton, This guide may help you: https://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks I usually use the CPU Governor, Thread Priority Scheduling, Adjust Network Buffers, and Adjust Ethernet MTU sections. I can run flowgraphs at 30.72MSps without hiccups. Thus, I suggest you check your host capabilities and probably more important: Check that GR is compiled and installed with `CMAKE_BUILD_TYPE=Release`. Besides, you may want to investigate which thread (and thus GR block) is the culprit. A first simple approach would be to use htop and find out which thread is close to 100% CPU load. If you change the htop Display Options to "Show custom thread names" it should be fairly simple to get a better understanding of your issue. Cheers Johannes On 05.05.22 20:52, Dobler, Anton wrote: > Dear community, > > > I am running UHD 4.0 and GNURadio 3.10 on a Ubuntu 20.04 with a N310 as > a SDR. > > > When I execute the benchmark_rate example with DPDK enabled, I do not > see any under- or overruns even with the sampling rate set to 125 MHz, > however using GNURadio - DPDK enabled here as well - I do not achieve > that high sampling rate. The limit seems to be around 30MHz though. > > > Do you know, apart from using taskset and isolcpus any other possibility > to achieve higher sampling rates? > > > Would it be an option to use the realtime kernel available for Ubuntu > 20.04 and is this kernel compatible with GNURadio? > > > Any help also with regards to the usage of taskset and isolcpus would be > highly appreciated! > > > Thank you in advance! > > > BR, > > > Anton >