Andrew Gallatin
3fade68cfd
When using software based ifnet counters, iflib has not factored TSO into account when reporting the segments and bytes sent. So it will underreport NIC bandwidth by a small percent, and will undercount sent segments by a large factor. Fix this by calculating the number of added segments the NIC will send, and add header size multiplied by that number to arrive at a correct accounting of segments and bytes sent. This makes these software counters directly comparable to hardware counters. Doing this requires moving the calculation into iflib_encap() where we have already parsed the packet and know the header size, MSS, etc. Differential Revision: https://reviews.freebsd.org/D56338 Sponsored by: Netflix
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|---|---|
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