Explore setting this value to a higher value

[AaronParsons]

paper_gpu/src/scripts/tweak-perf.sh

Line 15 in f1c35c9

sysctl net.core.rmem_max=8388608

Packet size is ~4.6 kB, so 2k packets at 4.6 kB/pkt is 8 MB (current setting). At 1 GB/s data rate incoming, this only amounts to 8 ms buffer time. If we wanted more (80 ms), we might try 10x increase to this value.