Hi Marcus,Thank you.1. Yes, I'm sending 100MS/s and there's no "U"s.2. I tried the command "rx_samples_to_file --rate 10e6 --duration 5 --file rx.dat", and the resulting file rx.dat is around 190MiB.3. I need to point out that "benchmark_rate --rx_rate 10e6" with one channel (--channels 0) is working right, but with two channels (--channels 0,1) results in the overflow state. And here's the benchmark ratesummary of two channels:Num received samples: 0Num dropped samples: 0Num overflows detected: 798Num transmitted samples: 0Num sequence errors: 0Num underflows detected: 0 Best Regards,Xinke Zhang > On 05/19/2015 03:10 AM, Marcus via USRP-users wrote:> Hello Xinke, > this is indeed interesting, on many levels: > You're successfully sending 100MS/s (no "U"s, right?), so your computer > doesn't seem to be underpowered; the very asymmetric way that 10MS/s RX > fails leads me to believe that there might be something wrong with > receiving at all. > Can you try > rx_samples_to_file --rate 10e6 --duration 5 --file rx.dat > and see if the resulting file rx.dat has nonzero size (in an ideal > world, it would be 200,000,000B in size, around 190MiB). > Best regards, > Marcus >On 05/19/2015 08:33 AM, Xinke Zhang via USRP-users wrote: >>>>>> Hi, >>>> My goal is to test the 2 simultaneous *rx* of single usrp x310 with >> intel adapter x520 (*10 gigabit network*). i used the benchmark_rate >> function provided by uhd examples (benchmark_rate --*rx*_rate 10e6 >> --channels 0,1), but i got the overflow error. when i tried to >> decreased the *rx*_rate, console ouptut was still overflow. Howerver, >> when i tested 2 simultaneous *tx* of single usrp x310 with intel >> adapter x520 (10 gigabit network) (benchmark_rate --*tx*_rate 10e6 >> --channels 0,1), it was successful. i even changed the *tx*_rate to >> 100e6, it was still successful. >>>> Also, I tested the 2 simultaneous tx&rx of single usrp x310 with intel >> adapter 82579LM (*1 gigabit network*), and both of them were successful. >>>> So I want to know what caused the 2 simultaneous *rx* of single usrp >> x310 with intel adapter x520 (10 gigabit network) into overflow state. >> Pls give me some suggestions. Thank you in advance. >>>> FYI, >>>> the uhd version I have tested are 3.8.2 & 3.8.4. my host pc is with >> intel i7 cpu and 16G memory. >>>> Best Regards, >>>> Xinke Zhang