What is GRO and how does it work?
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What is GRO (Generic Receive Offload) and why does it help?
Let's consider a download over a TCP connection. Now let's imagine how that connection looks like on a network card with MTU=1500: it is a stream of subsequent packets with very similar headers. All from one host to another, with minimal changes, like seq/ack/timestamps. Without GRO and other optimizations (like RFS), all the...
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