tzhouamandClaude Opus 5
b36a3431bd
Turns a branch of accumulated edge/CPU work into something someone else can
read, reproduce and continue.
README.md states what the fork is for (multimodal models on edge CPUs rather
than servers), the headline memory and speed results with their costs, and why
the numbers are worth reading -- five retracted conclusions, all measurement
errors rather than coding errors. Upstream's README is preserved at
docs/README.vllm-omni.md and NOTICE records the Apache-2.0 derivation and the
files this fork changes.
docs/edge/:
methodology.md the measurement discipline, which is the most transferable
thing here: what each of the five retractions was, and the
rule it left behind. Includes the two traps specific to this
stack -- vLLM's AOT compile cache keying on config so two
arms sharing an artifact load the wrong graph, and allocated
not being resident until mincore(2) says so.
results.md every measured figure with its spread and baseline, and an
explicit note that the four memory levers overlap and must
not be added.
cpu-4bit.md the two 4-bit paths, the packed layout as measured rather
than assumed, why the path choice is a config field, and the
GPTQ output-head trap that invalidated a whole round of W4A8
numbers.
harness.md how to run a comparison, and the two arguments that matter
more than they look (--context-len, --prompt-len), each of
which has produced a wrong conclusion by being left at its
default.
ROADMAP.md orders by whether the verification method is correct rather than by
expected size, lists what is done with results, what is next with expected
gains and how each would be verified, and -- at equal length -- what was
considered and rejected, including the CPU megakernel with the measurements
that rule it out for now.
benchmarks/edge_harness/ brings the tooling into the repo so the numbers are
reproducible: the grid runner, the single-run benchmarks, the memory ledger,
the fidelity metric, the Android agent suite, the quantizers, and the tests
that pin the harness's judgement. 82 tests pass from the new location.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L1ax5wYLA6XbqEL1i8L9gZ
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24 lines
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vllm-embedding
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Copyright 2026 tzhouam
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This product is a derivative work of vLLM-Omni
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(https://github.com/vllm-project/vllm-omni), licensed under the Apache License,
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Version 2.0. Upstream code is Copyright the vLLM-Omni contributors, and vLLM-Omni
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is itself a derivative of vLLM (https://github.com/vllm-project/vllm).
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Modifications in this fork are confined to edge/CPU inference and are listed in
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README.md; the substantive ones are:
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vllm_omni/model_executor/layers/quantization/cpu_int4.py
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4-bit weight-only quantization for the CPU backend
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vllm_omni/model_executor/models/spark2_5/spark2_5.py
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RoPE table sized to max_model_len rather than the advertised context
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vllm_omni/edge/
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device-class weight-path selection, KV budget sizing, memory release
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vllm_omni/platforms/cpu/, vllm_omni/patch.py
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CPU platform and CPU-backend patches
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benchmarks/edge_harness/
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measurement tooling (original to this fork)
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Upstream's README is preserved at docs/README.vllm-omni.md.
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