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

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 > > > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

On 05/19/2015 03:10 AM, Marcus Müller 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 > Also, what OS? Is it up-to-date? What is the cabling setup between the X310 and the host PC? > 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 >> >> >> >> >> >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com