Hi, I ran experiments using benchmark_rate using the latest versions of the 3.9.7 (UHD-3.9.LTS), 3.11.1 (maint), and 3.12.0 (master) branches.
benchmark_rate --args="addr=192.168.50.2" --rx_rate=100e6 --tx_rate=100e6 --channels="0,1" Results - With 3.9.7, the command completes with no errors, consistently - With 3.11.1 and 3.12.0, the command completes with around 500 underruns that occur right near the beginning - If I change the args to add ",second_addr=192.168.150.2", I get many more underruns and sequence errors (for 3.11.1 and 3.12.1 only; N/A for 3.9.7) Note that these data rates are only half the max rate of 200 MS/s per channel. (If I change rates to 200e6 (with dual 10Gb), the errors dramatically increase). I am wondering if the problem could be with my workstation HW or config or if the problem is with the various UHD versions. It seems that it is the latter given that these experiments were run in succession using the exact same workstation & USRP. If indeed the problem is with later UHD versions, I am wondering if there is a time frame for when such errors will be fixed. I would really like to move to the later versions for a number of reasons, including support of N3xx. Thank you. Rob Details - Ubuntu 16.04 - Intel XL710 NIC with 1:4 fanout DAC - X310/UBX
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