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Speed test matrix

gemma-4-26B-A4B-it on Intel Arc Pro B65 32GB

vllm · 0.32.0 · FP81 context (0) × 5 concurrency levels (1–16)
by @imthekaiserlmx v0.1.54 runMeasured

Hardware

Type
Discrete GPU
GPU
Intel Arc Pro B65
VRAM
32 GB
CPU
AMD EPYC 7343 16-Core Processor
RAM
499 GB
OS
Ubuntu 26.04.1 LTS

Engine

Engine
vllm
Version
0.32.0
Quantization
FP8
Build
vllm/vllm-openai-xpu:v0.32.0@sha256:20509fabe50dda62c09c0786d1a6effa299d3dbdddcc49331b93e65144652a8c

Run

Served model
gemma-4
Revision
4d7ae4984b7db7de8f8457170b3f1a419ee76d52
Decode test
Fixed duration
Prefill mode
Measured during decode warm-up
Time per measurement
30 s
Max output
256 tokens

Launch command

docker run --rm -d --name lsv-gem82-u-tp1-ctx131k --net=host --shm-size=32g --device /dev/dri:/dev/dri -v /dev/dri:/dev/dri -v /models/weights:/llm/models:ro -v /models/bench/lmx-ctx-20261019/session-a/gem82-u-tp1-ctx131k/session:/bench -e ZE_AFFINITY_MASK=0 -e VLLM_XPU_ENABLE_XPU_GRAPH=1 -e DISABLE_ESIMD_GDN_OUTPROJ=0 -e DISABLE_ESIMD_INT4=0 -e DISABLE_ESIMD_INT4_GEMM=0 -e VLLM_OFFLOAD_WEIGHTS_BEFORE_QUANT=1 -e VLLM_ALLOW_LONG_MAX_MODEL_LEN=1 -e VLLM_WORKER_MULTIPROC_METHOD=spawn -e CCL_ZE_IPC_EXCHANGE=sockets --entrypoint vllm vllm/vllm-openai-xpu:v0.32.0@sha256:20509fabe50dda62c09c0786d1a6effa299d3dbdddcc49331b93e65144652a8c serve --model /llm/models/gemma-4-26B-A4B-it --host 0.0.0.0 --served-model-name gemma-4 --tensor-parallel-size 1 --pipeline-parallel-size 1 --data-parallel-size 1 --gpu-memory-utilization 0.97 --max-model-len 5120 --max-num-seqs 16 --max-num-batched-tokens 8192 --block-size 64 --kv-cache-dtype auto --mamba-ssm-cache-dtype auto --dtype bfloat16 --quantization fp8 --enable-prefix-caching --trust-remote-code --limit-mm-per-prompt \{\"image\":0\,\"video\":0\} --cpu-offload-gb 0 --port 8000

Sustained decode

total tok/s · rows are context length, columns are simultaneous requests
Context124816
059.559 ms TTFT104.294 ms TTFT173.3115 ms TTFT279.3165 ms TTFT425.3286 ms TTFT

TTFT is measured after the benchmark warms the server's prompt cache, so it mostly excludes prefill.

All measurements

Latencies are medians. Total tok/s is output across all simultaneous requests.
PhaseContextRequests at onceStatusTotal tok/sPer request tok/sTTFTTime between tokensAverage active requestsCompleted requestsOutput tokensMeasured for
Sustained decode01Valid59.560.159 ms16.6 ms1.081,78330.0 s
Sustained decode02Valid104.253.194 ms18.8 ms2.0143,12430.0 s
Sustained decode04Valid173.344.1115 ms22.7 ms4.0205,19630.0 s
Sustained decode08Valid279.335.8165 ms27.9 ms7.9328,37330.0 s
Sustained decode016Valid425.327.4286 ms36.5 ms15.54812,74730.0 s