Interconnect & topology

A tightly coupled model repeatedly exchanges data. Message size, communication pattern and congestion shape what a network must deliver, alongside nominal link bandwidth.

Measure latency-sensitive phases and collective operations under realistic placement. Network topology, scheduler placement and the application decomposition must be evaluated as one design.

Evidence to bring

• Message sizes and collective patterns
• Topology and oversubscription
• Observed scaling under concurrent traffic

Record the test conditions and the person responsible for validating the result. Resolve the largest uncertainty before treating this as a deployable design.