/etc/sysctl.d/uhd-usrp2.conf is in uhd-host 3.9.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # USRP2 gigabit ethernet transport tuning
net.core.rmem_max=50000000
net.core.wmem_max=1048576
|