ikawrakow/ik_llama.cpp
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IQ2_KS: 2.1875 bpw non-linear quantization (#85)

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* Experimenting

* iq2k: Try make_qx_quants for the scale

Slightly better for LLaMA-3.1, Gemma-2, slightly worse for
Qwen2.5

* iq2k with make_qx_quants: adjust scale

* iq2ks: basics

* iq2_ks: CUDA works

* iq2_ks: WIP

* iq2_ks: WIP

* iq2_ks: Zen4

* iq2_ks: AVX2

* iq2_ks: scalar dot product

* iq2_ks: ARM_NEON

* iq2_ks: Metal

* iq2_ks: faster Metal

LLaMA-3.1-8B:
PP-512 = 475.22 ± 0.37 t/s
TG-128 =  45.32 ± 0.03 t/s

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Co-authored-by: Iwan Kawrakow <iwan.kawrakow@gmail.com>
This commit is contained in:
Kawrakow
2024-10-13 13:34:30 +03:00
committed by GitHub
parent c4c70af543
commit 67817fb5b9
20 changed files with 1130 additions and 57 deletions
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examples/quantize/quantize.cpp
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@@ -45,6 +45,7 @@ static const std::vector<struct quant_option> QUANT_OPTIONS = {
{ "IQ4_XS", LLAMA_FTYPE_MOSTLY_IQ4_XS, " 4.25 bpw non-linear quantization", },
{ "IQ4_KS", LLAMA_FTYPE_MOSTLY_IQ4_KS, " 4.25 bpw non-linear quantization", },
{ "IQ2_K", LLAMA_FTYPE_MOSTLY_IQ2_K, " 2.375 bpw non-linear quantization",},
{ "IQ2_KS", LLAMA_FTYPE_MOSTLY_IQ2_KS, " 2.1875 bpw non-linear quantization",},
{ "IQ3_K", LLAMA_FTYPE_MOSTLY_IQ3_K, " 3.44 bpw non-linear quantization", },
{ "IQ3_KL", LLAMA_FTYPE_MOSTLY_IQ3_KL, " 4 bpw non-linear quantization mix",},
{ "IQ4_K", LLAMA_FTYPE_MOSTLY_IQ4_K, " 4.5 bpw non-linear quantization", },