Hi Sumit - Just out of curiosity, have you tried the command the warning asks
you to execute?
{{{
sudo sysctl -w net.core.wmem_max=2500000
}}}
If not then please try it & see if that helps. - MLD
On Thu, Jun 27, 2019, at 12:27 PM, sumit kumar wrote:
> OS: Ubuntu 18.04
> Laptop: Dell Latitude 5490
> GNU Radio : 3.7.13.5
> UHD : UHD_3.15.0.git-1-gf83faf28
> SDR: Ettus N200
>
> I did a fresh install today using pybombs.
>
> Then tried running wifi_rx.grc from gr-ieee-80211 package and flooded with
> errors. Never seen them before. Bold marked part is coming with all the
> programs where I am connected to USRP such as uhd_fft while the rest happens
> with wifi_rx.grc (this is what I have observed so far).
>
> However, all the programs are working flawlessly with older version.
>
> Any tips to solve it.
>
> Regards
> Sumit
>
> *[INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501;
> UHD_3.15.0.git-1-gf83faf28
> [INFO] [USRP2] Opening a USRP2/N-Series device...
> [INFO] [USRP2] Current recv frame size: 1472 bytes
> [INFO] [USRP2] Current send frame size: 1472 bytes
> [WARNING] [UDP] The send buffer could not be resized sufficiently.
> Target sock buff size: 2500000 bytes.
> Actual sock buff size: 212992 bytes.
> See the transport application notes on buffer resizing.
> Please run: sudo sysctl -w net.core.wmem_max=2500000
> [WARNING] [UDP] The current send_buff_size of 212992 is less than the minimum
> recommended size of 307200 and may result in dropped packets on some NICs
> [WARNING] [UDP] The send buffer could not be resized sufficiently.
> Target sock buff size: 2500000 bytes.
> Actual sock buff size: 212992 bytes.
> See the transport application notes on buffer resizing.
> Please run: sudo sysctl -w net.core.wmem_max=2500000
> [WARNING] [UDP] The current send_buff_size of 212992 is less than the minimum
> recommended size of 307200 and may result in dropped packets on some NICs
> [WARNING] [UDP] The send buffer could not be resized sufficiently.
> Target sock buff size: 1048576 bytes.
> Actual sock buff size: 212992 bytes.
> See the transport application notes on buffer resizing.
> Please run: sudo sysctl -w net.core.wmem_max=1048576
> [WARNING] [UDP] The current send_buff_size of 212992 is less than the minimum
> recommended size of 307200 and may result in dropped packets on some NICs
> [WARNING] [UDP] The send buffer could not be resized sufficiently.
> Target sock buff size: 2500000 bytes.
> Actual sock buff size: 212992 bytes.
> See the transport application notes on buffer resizing.
> Please run: sudo sysctl -w net.core.wmem_max=2500000
> [WARNING] [UDP] The current send_buff_size of 212992 is less than the minimum
> recommended size of 307200 and may result in dropped packets on some NICs
> [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*
> *
*Traceback (most recent call last):
> File "/home/sumit/gradio/src/gr-ieee-80211/examples/wifi_rx.py", line 374,
> in <module>
> main()
> File "/home/sumit/gradio/src/gr-ieee-80211/examples/wifi_rx.py", line 362,
> in main
> tb = top_block_cls()
> File "/home/sumit/gradio/src/gr-ieee-80211/examples/wifi_rx.py", line 151,
> in __init__
> self.uhd_usrp_source_0.set_auto_dc_offset("false", 0)
> File
> "/home/sumit/gradio/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py",
> line 3499, in set_auto_dc_offset
> return _uhd_swig.usrp_source_sptr_set_auto_dc_offset(self, enb, chan)
> TypeError: in method 'usrp_source_sptr_set_auto_dc_offset', argument 2 of
> type 'bool'
>
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