[Performance] mistral-7b latency is 65.5% above the FP16 reference

This was generated by AI during triage.

Summary

mistral-7b completes aligned FP16 generation and matches exact token IDs, but TRTMC latency is 65.5% above the reference.

Observed behavior

• Precision: TRTMC FP16, reference FP16
• Output contract: exact token IDs (matched)
• Request: batch 1, 10 new tokens
• Measurement: 3 warmups followed by 10 iterations
• Candidate p50: 200.32 ms
• Reference p50: 121.01 ms
• Regression: +65.5% (allowed margin: 5%)

Expected behavior

The registered generation case should remain within its performance margin with output parity preserved.

Acceptance criteria

• Profile prefill, decode, KV-cache handling, and synchronization.
• Identify and fix the dominant latency source.
• Preserve exact-token output and the existing performance gate.

Reproduction platform

• Hardware: NVIDIA Thor X
• Architecture: aarch64
• TensorRT: 11.0
• GPU carveout: 48 GiB

Start with the registered mistral-7b generation case and its existing performance gate, then profile prefill, decode, KV-cache handling, and synchronization on the stated NVIDIA Thor setup. Identify the dominant latency source, preserve exact token IDs, and confirm the measured latency returns within the 5% margin.