tqkit 0.4.2

Unified toolkit for benchmarking and integrating TurboQuant+ KV-cache compression across inference engines (llama.cpp, vLLM, MLX).

tqkit

Unified toolkit for benchmarking and integrating TurboQuant+ KV-cache compression across LLM inference engines.

What this is

tqkit is a single CLI and Python package that talks to every inference engine that ships TurboQuant+ KV-cache compression:

• llama.cpp (TheTom/llama.cpp@feature/turboquant-kv-cache)
• vLLM (CUDA) (TheTom/vllm@feature/turboquant-kv-cache)
• vLLM (AMD ROCm) (TheTom/vllm@feature/turboquant-amd-noautotune)
• MLX-Swift (TheTom/mlx@feature/turboquant-plus)
• vllm-swift plugin

You bring the inference engine. tqkit autodetects what's installed, runs the canonical benchmark, and prints a reproducible KV-savings table.

Why this exists

KV cache is the dominant memory cost at long context. TurboQuant+ asymmetric (K=FP8, V=4-bit + metadata) shrinks it ~62% (or ~57% accounting for the 4 boundary layers that stay FP16). The savings replicate across engines and hardware vendors. tqkit is the proof, the tool, and the install path.

For a 14B model at 1M tokens of context:

layout	KV cache size (all-quantized)	fits on MI300X 192GB after weights?
FP16	192 GB	no
TQ+ asym (turboquant_k8v4)	73.5 GB headline / ~83 GB realistic with boundary skip	yes
TQ+ sym 4-bit (turboquant_4bit_nc)	50.3 GB	yes (more headroom)

You can verify the math yourself:

pip install tqkit
tq report --model qwen2.5-14b-instruct-1m --ctx 1M --layout tq+asym
tq table --model qwen2.5-14b-instruct-1m

Install

pip install tqkit

Usage

tq backends                                            # autodetect installed engines
tq report --model qwen2.5-14b-instruct-1m --ctx 32K    # KV cache size for one config
tq table --model qwen2.5-14b-instruct-1m               # full layout × ctx grid
tq integrate <backend>                                 # install + serve recipe
tq bench                                               # canonical benchmark (v0.3.0)

Example output:

$ tq report --model qwen2.5-14b-instruct-1m --ctx 1M --layout tq+asym
[KV cache] model: Qwen/Qwen2.5-14B-Instruct-1M
[KV cache] arch: layers=48 kv_heads=8 head_dim=128
[KV cache] layout: tq+asym
[KV cache] per-token: 72.0 KB (vs 192.0 KB FP16)
[KV cache] total @ 1M ctx: 72.0 GB (vs 192.0 GB FP16, 62.5% savings)

Integration recipes

One-page docs for plugging TurboQuant+ into each supported backend live under docs/integrate/.

• llama.cpp — NVIDIA, Apple, AMD, CPU
• vLLM (NVIDIA CUDA) — A100, H100, RTX 4090
• vLLM (AMD ROCm) — MI300X (the only TQ+ port for AMD anywhere)
• MLX-Swift — Apple Silicon Macs + iPhone
• vllm-swift — Apple Silicon OpenAI-API server

Docker (AMD ROCm)

docker pull thetom/vllm-turboquant:rocm-7.2
docker run --rm -it \
    --device=/dev/kfd --device=/dev/dri --group-add video --ipc=host \
    -v "$HOME/.cache/huggingface:/root/.cache/huggingface" \
    -p 8000:8000 thetom/vllm-turboquant:rocm-7.2 \
        --model Qwen/Qwen2.5-14B-Instruct-1M --kv-cache-dtype turboquant_k8v4

See docker/README.md for build details.

Status

v0.4.0 — alpha. Shipping today:

• KV math + tq report + tq table
• Pinned canonical_bench.yml + tq config
• Engine bridges (tq bench) for llama.cpp, vLLM (CUDA + AMD), MLX-Swift, vllm-swift
• Integration recipes for all 5 backends (docs/integrate/)
• Docker scaffold for AMD ROCm (docker/Dockerfile.vllm-amd)
• Models supported in tq report: Qwen2.5 7B/14B/32B, Qwen3-8B, Qwen3.6-27B, Qwen3.6-35B-A3B, Qwen3-Next-80B-A3B, Llama-3.1 8B/70B, Mistral-7B
• 39 tests, 92% line coverage, ≥85% gate enforced

See CHANGELOG.md for the full version history.

License

Apache 2.0.