From what I read, some part of the tcp protocol operation can be offloaded from kernel to network card driver thanks to TOE (or GSO, LSO, LRO..).
My objective is too find if a given socket has some part of its treatment offloaded.
It seems to be governed at the interface level, we can see if offloading is allowed with
# ethotool -k eth0
However I find it difficult to see the state of a given socket, especially if ACK packet management has been offloaded
na_netstat seems to be able to display the information but is not the netstat version available in centos 6.5.
I guess that:
head -n1 < /proc/net/tcp ; grep -a 3952364802 /proc/net/tcp
allow me to find all state information about a given socket (if 3952364802 is a socket number), but I don't know how to decode its output.
- question: how to see offload state of a given socket?
- bonus question: where can I find description of the heuristic related to offload activation.
