Learning objectives
What you should understand
- Trace buffer ownership from NIC DMA to recvmsg
- Locate interrupt, NAPI, socket and copy costs
- Identify batching and queueing boundaries
Lab
Hands-on exercise
Trace one UDP packet through the standard Linux receive path.
Deliverable
Evidence of completion
A receive-path diagram annotated with queues, copies and timestamps.
- Prerequisite
- EP 35