On 08/21/2018 01:46 PM, Nicole Bienert wrote:
Sweet, that helped. I ran several times at different BWs. I ran it at
10MHz roughly 8 times, but it overflowed once. Under my previous
settings it would overflow every time at 10MHz. I still can't go
higher than that reliably.
Running in a VM, I would not expect super performance from USB.
_Here is an example of when 10MHz worked:_
nlb5224@nlb5224-VirtualBox:~/workarea-uhd/uhd/host/examples/rx_samples_to_file3/build$
./rx_samples_to_file --null --freq 300e6 --rate 10e6 --ant RX2 --gain
75 --bw 10e6 --type float --args "type=b200,num_recv_frames=256"
[INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501;
UHD_3.11.0.HEAD-0-ga1b5c4ae
[WARNING] [UHD] Unable to set the thread priority. Performance may be
negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
Creating the usrp device with: type=b200,num_recv_frames=256...
[INFO] [B200] Detected Device: B205mini
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [AD936X] Performing CODEC loopback test...
[INFO] [AD936X] CODEC loopback test passed
[INFO] [B200] Setting master clock rate selection to 'automatic'.
[INFO] [B200] Asking for clock rate 16.000000 MHz...
[INFO] [B200] Actually got clock rate 16.000000 MHz.
[INFO] [CORES] Performing timer loopback test...
[INFO] [CORES] Timer loopback test passed
Using Device: Single USRP:
Device: B-Series Device
Mboard 0: B205mini
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: FE-RX1
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: FE-TX1
Setting RX Rate: 10.000000 Msps...
[INFO] [B200] Asking for clock rate 40.000000 MHz...
[INFO] [B200] Actually got clock rate 40.000000 MHz.
[INFO] [CORES] Performing timer loopback test...
[INFO] [CORES] Timer loopback test passed
Actual RX Rate: 10.000000 Msps...
Setting RX Freq: 300.000000 MHz...
Actual RX Freq: 300.000000 MHz...
Setting RX Gain: 75.000000 dB...
Actual RX Gain: 75.000000 dB...
Setting RX Bandwidth: 10.000000 MHz...
Actual RX Bandwidth: 10.000000 MHz...
Waiting for "lo_locked": ++++++++++ locked.
Press Ctrl + C to stop streaming...
^C
Done!
_Here is the time that 10MHz didn't work:_
nlb5224@nlb5224-VirtualBox:~/workarea-uhd/uhd/host/examples/rx_samples_to_file3/build$
./rx_samples_to_file --freq 300e6 --rate 10e6 --ant RX2 --gain 75 --bw
10e6 --type float --args "type=b200,num_recv_frames=256"
[INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501;
UHD_3.11.0.HEAD-0-ga1b5c4ae
[WARNING] [UHD] Unable to set the thread priority. Performance may be
negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
Creating the usrp device with: type=b200,num_recv_frames=256...
[INFO] [B200] Detected Device: B205mini
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [AD936X] Performing CODEC loopback test...
[INFO] [AD936X] CODEC loopback test passed
[INFO] [B200] Setting master clock rate selection to 'automatic'.
[INFO] [B200] Asking for clock rate 16.000000 MHz...
[INFO] [B200] Actually got clock rate 16.000000 MHz.
[INFO] [CORES] Performing timer loopback test...
[INFO] [CORES] Timer loopback test passed
Using Device: Single USRP:
Device: B-Series Device
Mboard 0: B205mini
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: FE-RX1
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: FE-TX1
Setting RX Rate: 10.000000 Msps...
[INFO] [B200] Asking for clock rate 40.000000 MHz...
[INFO] [B200] Actually got clock rate 40.000000 MHz.
[INFO] [CORES] Performing timer loopback test...
[INFO] [CORES] Timer loopback test passed
Actual RX Rate: 10.000000 Msps...
Setting RX Freq: 300.000000 MHz...
Actual RX Freq: 300.000000 MHz...
Setting RX Gain: 75.000000 dB...
Actual RX Gain: 75.000000 dB...
Setting RX Bandwidth: 10.000000 MHz...
Actual RX Bandwidth: 10.000000 MHz...
Waiting for "lo_locked": ++++++++++ locked.
Press Ctrl + C to stop streaming...
OGot an overflow indication. Please consider the following:
Your write medium must sustain a rate of 80.000000MB/s.
Dropped samples will not be written to the file.
Please modify this example for your purposes.
This message will not appear again.
^C
Done!
On Tue, Aug 21, 2018 at 10:20 AM Marcus D. Leech <[email protected]
<mailto:[email protected]>> wrote:
On 08/21/2018 01:15 PM, Nicole Bienert wrote:
> Woops, that was silly. It still has the overflow error.
>
>
nlb5224@nlb5224-VirtualBox:~/workarea-uhd/uhd/host/examples/rx_samples_to_file3/build$
> ./rx_samples_to_file --null --freq 300e6 --rate 5e6 --ant RX2
--gain
> 75 --bw 5e6 --type float
> [INFO] [UHD] linux; GNU C++ version 7.3.0; Boost_106501;
> UHD_3.11.0.HEAD-0-ga1b5c4ae
> [WARNING] [UHD] Unable to set the thread priority. Performance
may be
> negatively affected.
> Please see the general application notes in the manual for
instructions.
> EnvironmentError: OSError: error in pthread_setschedparam
>
> Creating the usrp device with: ...
> [INFO] [B200] Detected Device: B205mini
> [INFO] [B200] Operating over USB 3.
> [INFO] [B200] Initialize CODEC control...
> [INFO] [B200] Initialize Radio control...
> [INFO] [B200] Performing register loopback test...
> [INFO] [B200] Register loopback test passed
> [INFO] [AD936X] Performing CODEC loopback test...
> [INFO] [AD936X] CODEC loopback test passed
> [INFO] [B200] Setting master clock rate selection to 'automatic'.
> [INFO] [B200] Asking for clock rate 16.000000 MHz...
> [INFO] [B200] Actually got clock rate 16.000000 MHz.
> [INFO] [CORES] Performing timer loopback test...
> [INFO] [CORES] Timer loopback test passed
> Using Device: Single USRP:
> Device: B-Series Device
> Mboard 0: B205mini
> RX Channel: 0
> RX DSP: 0
> RX Dboard: A
> RX Subdev: FE-RX1
> TX Channel: 0
> TX DSP: 0
> TX Dboard: A
> TX Subdev: FE-TX1
>
> Setting RX Rate: 5.000000 Msps...
> [INFO] [B200] Asking for clock rate 40.000000 MHz...
> [INFO] [B200] Actually got clock rate 40.000000 MHz.
> [INFO] [CORES] Performing timer loopback test...
> [INFO] [CORES] Timer loopback test passed
> Actual RX Rate: 5.000000 Msps...
>
> Setting RX Freq: 300.000000 MHz...
> Actual RX Freq: 300.000000 MHz...
>
> Setting RX Gain: 75.000000 dB...
> Actual RX Gain: 75.000000 dB...
>
> Setting RX Bandwidth: 5.000000 MHz...
> Actual RX Bandwidth: 5.000000 MHz...
>
> Waiting for "lo_locked": ++++++++++ locked.
>
> Press Ctrl + C to stop streaming...
> OGot an overflow indication. Please consider the following:
> Your write medium must sustain a rate of 40.000000MB/s.
> Dropped samples will not be written to the file.
> Please modify this example for your purposes.
> This message will not appear again.
> ^C
> Done!
Try adding:
--args "type=b200,num_recv_frames=256"
To see if that changes the behavior
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