Hi,
I started playing with LRO and I can't seem to figure out if it's really on or not.
# dladm show-linkprop -p lro net0
LINK PROPERTY PERM VALUE EFFECTIVE DEFAULT POSSIBLE
net0 lro rw on on auto on,off,auto
# kstat net0:0:link
...
lrobadipcsums 0
lrobadtcpcsums 0
lrooutseqpkts 43
lrotruncpkts 0
...
# dtrace -n 'fbt::*lro*:entry { @[probemod, probefunc] = count(); }'
... then I kick of some large file uploads...
^C
mac mac_rx_swlro 189410
mac mac_swlro_flush 203034
mac mac_swlro_do_lro 684416
# kstat net0:0:link
...
lrooutseqpkts 55
...
DTrace probes suggest it's only done in software.
PS: NIC is network-pciex8086,1589