How to increase the efficiency of UDP packet collection

Reference articles

Http://ref.onixs.biz/lost-multicast-packets-troubleshooting.html

Operating System Kernel Network buffers tuning

Operating system kernel Network buffer tuning

Linux

Run the command to check the current settings of the sysctl -A | grep net | grep ‘mem\|backlog‘ | grep ‘udp_mem\|rmem_max\|max_backlog‘ system level buffers.

For example:

Net.core.rmem_max	=	131071
Net.core.netdev_max_backlog	=	1000
Net.ipv4.udp_mem	=	1501632	2002176	3003264

Increase the maximum socket receive buffer size to 32MB:

Increase the maximum socket receive buffer size to 32MB:

sysctl -w net.core.rmem_max=33554432

Increase the maximum total buffer-space allocatable. This is measured in units of pages (4096 bytes):

Increase the total amount of buffer space that can be allocated, values in pages, per page unit equals 4096 bytes:
sysctl -w net.ipv4.udp_mem="262144 327680 393216"

Note net.ipv4.udp_mem that works in pages, so to calculate the size of bytes multiply values by page_size, where page_size = 4096 (4K ). Then the on max udp_mem size bytes is 385152 * 4096 = 1,577,582,592.

Increase the queue size for incoming packets:

Increase the Receive packet queue size:
sysctl -w net.core.netdev_max_backlog=2000

To apply the changes, run the sysctl -p command.

Check the new settings by running the sysctl -A | grep net | grep ‘mem\|backlog‘ | grep ‘udp_mem\|rmem_max\|max_backlog‘ command again.

How to increase the efficiency of UDP packet collection