Correct private-cache states are only part of integration. Data storage, coverage metadata, device access and memory-side completion each have a contract. This part follows those boundaries without redefining the earlier transactions. The last topic separates H's per-line serialization from the memory controller's scheduling, and shows the write-queue check that keeps same-address order.
Lesson | After it you can... |
|---|---|
Define residency independently of permission and authority. | |
Connect LLC replacement to safe coverage retirement. | |
Separate payload, tracking and pending resources. | |
Compare complete policies under identical useful work. | |
Classify the device path and required data reconciliation. | |
Separate access coherence from retained device permission. | |
Distinguish device caching, attached memory and synchronization. | |
Specify direction, handoff, completion and lifetime. | |
Name observer domain and completion target. | |
Keep same-address order with a write-queue address check. | |
Detect read-after-write, ordering, matching and byte-merge errors. | |
Attribute delay to the executed data and permission path. |
Suggested order: LLC residency and tracking, devices and software handoff, then memory-side interfaces. The CPU examples retain MESI permissions, and every added device, storage level or interface assumption is named where introduced.
The path can be configured wrongly, the DMA address or lifetime can be wrong, or publication/completion ordering can be missing. Fabric coherence alone does not establish the end-to-end software contract.