[Feature]: Add inference performance validation with AIPerf

[yuanchen8911]

Feature Summary

Add an inference-throughput performance validator that benchmarks Dynamo vLLM inference endpoints using AIPerf, complementing the existing nccl-all-reduce-bw training performance validator.

Problem/Use Case

AICR currently supports training performance validation via NCCL bandwidth tests (aicr validate --phase performance), but has no equivalent for inference workloads. Users deploying Dynamo-based inference stacks cannot validate that their inference endpoints meet throughput and latency requirements as part of the AICR validation pipeline.

Without inference performance validation:

• Broken GPU drivers, misconfigured DRA, or CUDA errors in inference deployments go undetected
• No automated go/no-go gate for inference stack readiness
• No baseline performance numbers for comparison across deployments

Proposed Solution

Add an inference-throughput check to the performance phase that:

1. Discovers or deploys an inference workload:

   • If a Dynamo frontend service is already running, benchmarks against it (scoped to DynamoGraphDeployment namespaces to avoid benchmarking the wrong service on shared clusters)
   • If no endpoint exists, auto-deploys a DynamoGraphDeployment with Qwen/Qwen3-0.6B (1 worker per GPU, single node), benchmarks, then cleans up

2. Runs AIPerf as a K8s Job with dynamic concurrency (16 × worker_count), measuring:

   • Output token throughput (tokens/sec)
   • Time to first token p99 (ms)

3. Evaluates constraints from the recipe overlay (with 10% tolerance):

   validation:
     performance:
       checks:
         - inference-throughput
       constraints:
         - name: inference-throughput
           value: ">= 5000"
         - name: inference-ttft-p99
           value: "<= 200"

Tested on EKS (H100, Qwen/Qwen3-0.6B)

Scenario	Workers	Throughput (tok/s)	TTFT p99 (ms)	Result
1 GPU, auto-deploy	1	5,667	84	PASS
1 GPU, existing workload	1	6,039	58	PASS
8 GPUs, auto-deploy (single node)	8	37,961	146	PASS
16 GPUs, auto-deploy (2 nodes)	16	74,927	120	PASS

Success Criteria

• aicr validate --phase performance runs inference-throughput check for inference+dynamo recipes
• Auto-deploy path creates workload, benchmarks, cleans up (idempotent, handles partial failures)
• Existing workload path discovers and benchmarks scoped to the correct service
• Default constraints (>= 5000 tok/s, <= 200ms TTFT p99) catch broken deployments
• Near-linear GPU scaling observed (8.1x with 8 GPUs)

Alternatives Considered

• inference-perf (separate load generator) — similar to AIPerf but less integrated with Dynamo ecosystem
• Manual benchmarking — not automated, not part of validation pipeline
• Larger model (Llama-3.1-8B) — considered for more representative benchmarks, but Qwen3-0.6B is preferred for smoke testing (fast model load, small image, matches Dynamo deploy template defaults)

Implementation

Branch: feat/inference-perf-validator (yuan fork)

Files: 8 changed, +1043 lines

• validators/performance/inference_throughput.go — CheckFunc
• validators/performance/inference_throughput_constraint.go — Core pipeline
• validators/performance/testdata/inference/{dynamo-deployment,queue}.yaml — Templates
• recipes/validators/catalog.yaml — Catalog entry
• recipes/overlays/h100-eks-ubuntu-inference-dynamo.yaml — Overlay constraints
• pkg/defaults/timeouts.go — Timeout constants
• validators/performance/main.go — Registration