Hi Snehasish, How long do you record samples? Do the overflows occur immediately? Are they continuous, bursty, only at the beginning? What rate can you run at without overflows?
I would suggest running "benchmark_rate --rx_rate 25.6e6 --duration 600" and "uhd_fft --samp-rate 25.6e6 --freq 2.4e9". Your system should be able to run both of those apps without continuous overflows. Jonathon On Wed, Feb 7, 2018 at 8:41 AM, Snehasish Kar via USRP-users <usrp-users@lists.ettus.com> wrote: > Hello > > > I am uisng NI USRP 2954R with RAM 64GB, and intel Xeon CPU D-1537 @ 1.70GHz > with supermicro motherboard MBD-X10SDV-7TP4F and intel SFP+ of model X552. > I am trying to stream data at sample rate of 25.6MSPS using both the > receivers in gnuradio and writing the the samples to a linux-FIFO, but as > soon as I start it, it only gives me overflow on both the channels. Please > help me with it, where I am going wrong. Below is the output of my > uhd_usrp_probe. > > > > uhd_usrp_probe --args="addr=192.168.40.2" > [INFO] [UHDlinux; GNU C++ version 4.8.3 20140911 (Red Hat 4.8.3-7); > Boost_105400; UHD_4.0.0.rfnoc-devel-409-gec9138eb] > [INFO] [X300] X300 initialization sequence... > [INFO] [X300] Determining maximum frame size... > [INFO] [X300] Maximum frame size: 8000 bytes. > [INFO] [X300] Setup basic communication... > [INFO] [X300] Loading values from EEPROM... > [INFO] [X300] Setup RF frontend clocking... > [INFO] [X300] Radio 1x clock:200 > [INFO] [X300] Detecting internal GPSDO.... > [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a > [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 0... > [INFO] [RFNOC] pass (Throughput: 1290.5MB/s) > [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 1... > [INFO] [RFNOC] pass (Throughput: 1304.2MB/s) > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > _____________________________________________________ > / > | Device: X-Series Device > | _____________________________________________________ > | / > | | Mboard: X310 > | | revision: 11 > | | revision_compat: 7 > | | product: 30810 > | | mac-addr0: 00:80:2f:16:51:21 > | | mac-addr1: 00:80:2f:16:51:22 > | | gateway: 192.168.10.1 > | | ip-addr0: 192.168.10.2 > | | subnet0: 255.255.255.0 > | | ip-addr1: 192.168.20.2 > | | subnet1: 255.255.255.0 > | | ip-addr2: 192.168.30.2 > | | subnet2: 255.255.255.0 > | | ip-addr3: 192.168.40.2 > | | subnet3: 255.255.255.0 > | | serial: 310514A > | | FW Version: 5.1 > | | FPGA Version: 33.0 > | | FPGA git hash: b0890fa-dirty > | | RFNoC capable: Yes > | | > | | Time sources: internal, external, gpsdo > | | Clock sources: internal, external, gpsdo > | | Sensors: gps_gpgga, gps_gprmc, gps_time, gps_locked, gps_servo, > ref_locked > | | _____________________________________________________ > | | / > | | | RX Dboard: A > | | | ID: UBX-160 v1 (0x007a) > | | | Serial: 3103BF3 > | | | _____________________________________________________ > | | | / > | | | | RX Frontend: 0 > | | | | Name: UBX RX > | | | | Antennas: TX/RX, RX2, CAL > | | | | Sensors: lo_locked > | | | | Freq range: 10.000 to 6000.000 MHz > | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB > | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz > | | | | Connection Type: IQ > | | | | Uses LO offset: No > | | | _____________________________________________________ > | | | / > | | | | RX Codec: A > | | | | Name: ads62p48 > | | | | Gain range digital: 0.0 to 6.0 step 0.5 dB > | | _____________________________________________________ > | | / > | | | RX Dboard: B > | | | ID: UBX-160 v1 (0x007a) > | | | Serial: 3103C35 > | | | _____________________________________________________ > | | | / > | | | | RX Frontend: 0 > | | | | Name: UBX RX > | | | | Antennas: TX/RX, RX2, CAL > | | | | Sensors: lo_locked > | | | | Freq range: 10.000 to 6000.000 MHz > | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB > | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz > | | | | Connection Type: IQ > | | | | Uses LO offset: No > | | | _____________________________________________________ > | | | / > | | | | RX Codec: B > | | | | Name: ads62p48 > | | | | Gain range digital: 0.0 to 6.0 step 0.5 dB > | | _____________________________________________________ > | | / > | | | TX Dboard: A > | | | ID: UBX-160 v1 (0x0079) > | | | Serial: 3103BF3 > | | | _____________________________________________________ > | | | / > | | | | TX Frontend: 0 > | | | | Name: UBX TX > | | | | Antennas: TX/RX, CAL > | | | | Sensors: lo_locked > | | | | Freq range: 10.000 to 6000.000 MHz > | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB > | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz > | | | | Connection Type: QI > | | | | Uses LO offset: No > | | | _____________________________________________________ > | | | / > | | | | TX Codec: A > | | | | Name: ad9146 > | | | | Gain Elements: None > | | _____________________________________________________ > | | / > | | | TX Dboard: B > | | | ID: UBX-160 v1 (0x0079) > | | | Serial: 3103C35 > | | | _____________________________________________________ > | | | / > | | | | TX Frontend: 0 > | | | | Name: UBX TX > | | | | Antennas: TX/RX, CAL > | | | | Sensors: lo_locked > | | | | Freq range: 10.000 to 6000.000 MHz > | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB > | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz > | | | | Connection Type: QI > | | | | Uses LO offset: No > | | | _____________________________________________________ > | | | / > | | | | TX Codec: B > | | | | Name: ad9146 > | | | | Gain Elements: None > | | _____________________________________________________ > | | / > | | | RFNoC blocks on this device: > | | | > | | | * DmaFIFO_0 > | | | * Radio_0 > | | | * Radio_1 > | | | * chan128_0 > | | | * chan128_1 > | | | * downSampler_0 > | | | * downSampler_1 > | | | * PacketResizer_0 > | | | * PacketResizer_1 > | | | * FIFO_0 > | | | * FIFO_1 > | | | * FIFO_2 > | | | * FIFO_3 > > > Best Regards > Snehasish > > > > _______________________________________________ > 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
