Hi Marcus, Thanks for your comments on my other USRP questions. I have another issue with N321 USRP.Following the tuning tips in https://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks , I have set wmem_max, wmem_default, rmem_max, rmem_default to 33554432 in host (Ubuntu): sudo sysctl -w net.core.wmem_max=33554432 sudo sysctl -w net.core.rmem_max=33554432 sudo sysctl -w net.core.wmem_default=33554432 sudo sysctl -w net.core.rmem_default=33554432I have made the configuration permanent by adding these lines in /etc/sysctl.conf, such that they won't get lost after host reboot. I want to do the same in N321 but couldn't because there is no sysctl.conf in it. I can still configure these parameters from terminal, but it won't survive a reboot.The Linux in N321 is tiny. How can I make the configuration permanently in it? Any comment from the community will be appreciated. Thanks,Hongwei
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