It is being investigated within Ettus R&D. I have no estimate for a resolution.
Sent from my iPhone > On Apr 20, 2022, at 6:56 PM, Dario Fertonani <[email protected]> > wrote: > > > Any feedback? This is very easy to reproduce and happens on every single x86 > machine, with tens of B210 devices around the world. The command line in my > original message gives problems even when 25% of the USB throughput is > removed by forcing "sc12" format over the default "sc16" format. > > The hope is always that newer drivers don't break the existing systems, which > did fail us here. > > Thanks, > Dario > > >> On Wed, Apr 13, 2022 at 3:54 PM Dario Fertonani <[email protected]> >> wrote: >> Hi, >> >> I'm here to report that the "golden standard" for benchmarking the B210 >> streaming performance is giving us issues with the latest UHD versions. >> >> The following command >> ./benchmark_rate --rx_channels "0,1" --rx_rate 30720000 --tx_channels "0,1" >> --tx_rate 30720000 --duration 120 >> gives flawless output with UHD 3.10.3 and 3.15.0, but orrible output with >> UHD 4.1+, with everything else being equal. These results hold on several >> x86 machines (Intel i7, i9, Xeon, and AMD Ryzen and Epyc) and with at least >> five different B210 devices. In each case, for a given host machine, USB >> cable, and B210 device, we compiled UHD from source and saw the results >> degrade sharply simply by running the command from the newer folders. >> >> We typically run UHD from Ubuntu packages (3.10.3 for Ubuntu 18, 3.15.0 for >> Ubuntu 20, or whatever is in the latest Ubuntu PPA) rather than building it >> from source code. We went through the source code route because we saw >> issues and wanted to reproduce them with the official "benchmark_rate" >> utility, which unfortunately comes only with the source code version. >> However, I want to point out that the poor results seen with >> "benchmark_rate" are consistent with the poor results of our own code when >> built with newer UHD versions. >> >> Thanks, >> Dario >> >> >> > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected]
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