Environment Variables¶

Complete reference for environment variables used in vLLM CPU Performance Evaluation scripts and playbooks.

Test Configuration¶

Model and Test Settings¶

Variable	Description	Default	Example
`TEST_MODEL`	Override test model	None	`meta-llama/Llama-3.2-1B-Instruct`
`REQUESTED_CORES`	Override core count	Varies by script	`16`
`VLLM_MODE`	vLLM operational mode	`managed`	`managed`, `external`
`WORKLOAD_TYPE`	Test workload type	Varies	`chat`, `rag`, `code`

MTEB Quality Testing¶

Variable	Description	Default	Example
`MTEB_TASK_PRESET`	Task preset	`quick`	`quick`, `comprehensive`, `retrieval`
`MTEB_TASKS`	Custom task list	None	`Banking77,Emotion`
`MTEB_LANGUAGES`	Language configuration	`en`	`en`, `en,es,fr`
`MTEB_CONTAINER_IMAGE`	Custom MTEB container	`quay.io/vllm-cpu-perf-eval/vllm-mteb:latest`	Custom registry URL
`RESULTS_DIR`	MTEB results directory	`results/mteb`	`/path/to/results`

Container Images¶

Variable	Description	Default	Example
`VLLM_CONTAINER_IMAGE`	vLLM container image	Latest vLLM CPU	`registry.redhat.io/rhaii/vllm-cpu-rhel9:3.4.0`
`VLLM_CONTAINER_ENTRYPOINT`	Custom entrypoint	None	`/opt/zendnn/activate.sh && vllm serve`

vLLM Server Configuration¶

Variable	Description	Default	Example
`VLLM_ENDPOINT_URL`	External vLLM endpoint	None (auto-detect)	`http://192.168.1.100:8000`
`VLLM_HEALTH_TIMEOUT`	Health check timeout (seconds)	`600`	`900` (for slow-starting containers)
`VLLM_CPU_START`	Starting CPU for vLLM	Auto	`64`
`VLLM_NUMA_NODE`	NUMA node for vLLM	Auto	`1`

Load Generator Configuration¶

Variable	Description	Default	Example
`GUIDELLM_CPUS`	CPU range for GuideLLM	Auto	`0-31`
`GUIDELLM_NUMA_NODE`	NUMA node for GuideLLM	Auto	`0`

Monitoring and Logging¶

MLflow¶

Variable	Description	Default	Example
`MLFLOW_TRACKING_URI`	MLflow server URI	`http://localhost:5000`	`http://mlflow.example.com:5000`
`MLFLOW_EXPERIMENT_NAME`	Experiment name	Auto-generated	`vllm-embedding-benchmarks`

Prometheus and Grafana¶

Variable	Description	Default	Example
`PROMETHEUS_PORT`	Prometheus port	`9090`	`9091`
`GRAFANA_PORT`	Grafana port	`3000`	`3001`

Ansible Configuration¶

SSH and Connectivity¶

Variable	Description	Default	Example
`DUT_HOSTNAME`	Device under test hostname	Required	`dut.example.com`
`ANSIBLE_SSH_KEY`	SSH private key path	`~/.ssh/id_rsa`	`~/.ssh/custom_key`
`ANSIBLE_SSH_USER`	SSH username	Current user	`testuser`

Inventory Management¶

Variable	Description	Default	Example
`INVENTORY_FILE`	Ansible inventory path	`inventory/hosts.yml`	`custom-inventory.yml`

Script-Specific Variables¶

run-rhaiis-concurrent-load.sh¶

Variable	Description	Example
`MODELS_INPUT`	Model preset or list	`all`, `llama`, `qwen`, `tiny`
`CORES_INPUT`	Core counts	`8,16,32`
`WORKLOADS_INPUT`	Workload types	`chat,rag`
`TENSOR_PARALLEL`	Tensor parallelism value	`2`, `4`, `8`
`SKIP_MODELS_INPUT`	Models to skip	`RedHatAI/TinyLlama-1.1B-Chat-v1.0-pruned2.4`

run-embedding-suite.sh¶

Variable	Description	Example
`EMBEDDING_MODELS`	Model preset	`all`, `small`, `medium`, `large`, `quick`
`CORE_COUNTS`	Core counts to test	`4,8,16,32`
`NUM_PROMPTS`	Number of prompts	`100`

run-mteb-model-sweep.sh¶

Variable	Description	Example
`MTEB_MODELS`	Model list	`all`, custom list
`MTEB_CORES`	Core count	`4`

Advanced Configuration¶

NUMA and CPU Pinning¶

All socket pinning variables can be set via environment:

export VLLM_CPU_START=64
export VLLM_NUMA_NODE=1
export GUIDELLM_CPUS="0-31"
export GUIDELLM_NUMA_NODE=0

Container Runtime¶

Variable	Description	Default	Example
`CONTAINER_RUNTIME`	Container runtime	Auto-detect	`docker`, `podman`

Usage Examples¶

Override Test Model¶

export TEST_MODEL="meta-llama/Llama-3.2-3B-Instruct"
./bash/run-embedding-suite.sh

Use Custom RHAIIS Container¶

export VLLM_CONTAINER_IMAGE="registry.redhat.io/rhaii/vllm-cpu-rhel9:3.4.0"
./bash/run-rhaiis-concurrent-load.sh

Configure MLflow Tracking¶

export MLFLOW_TRACKING_URI="http://mlflow-server.example.com:5000"
ansible-playbook log-to-mlflow.yml

Socket Separation via Environment¶

export VLLM_CPU_START=64
export VLLM_NUMA_NODE=1
export GUIDELLM_CPUS="0-31"
export GUIDELLM_NUMA_NODE=0
./bash/run-rhaiis-concurrent-load.sh --models qwen --cores 32

External vLLM Endpoint (DUT-Only Mode)¶

export VLLM_MODE="external"
export VLLM_ENDPOINT_URL="http://192.168.1.100:8000"
ansible-playbook llm-benchmark-auto.yml \
  -e "workload_type=chat" \
  -e "requested_cores=16"

ZenDNN Configuration (AMD)¶

export VLLM_CONTAINER_IMAGE="amd-vllm-zendnn:latest"
export VLLM_CONTAINER_ENTRYPOINT="/opt/zendnn/activate.sh && vllm serve"
export VLLM_HEALTH_TIMEOUT=900  # ZenDNN takes longer to initialize (default 600s)
ansible-playbook llm-benchmark-auto.yml

Precedence¶

Environment variables are overridden by: 1. Command-line flags (highest priority) 2. Ansible extra vars (-e flag) 3. Environment variables 4. Script defaults (lowest priority)

Example:

# Environment sets 16 cores
export REQUESTED_CORES=16

# But command-line flag overrides to 32
./bash/run-embedding-suite.sh --cores 32  # Uses 32 cores