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llama.cpp
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Restrict quant types per family

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Ed Addario 2025-08-23 14:45:07 +01:00
parent decafae270
commit 3856d60328
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1 changed files with 4 additions and 15 deletions
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19
src/llama-quant.cpp
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@ -628,11 +628,7 @@ static std::unordered_map<std::string, ggml_type> target_bpw_type(
constexpr ggml_type k_quants[] = {
GGML_TYPE_Q2_K,
GGML_TYPE_Q3_K,
GGML_TYPE_Q4_0,
GGML_TYPE_Q4_1,
GGML_TYPE_Q4_K,
GGML_TYPE_Q5_0,
GGML_TYPE_Q5_1,
GGML_TYPE_Q5_K,
GGML_TYPE_Q6_K,
GGML_TYPE_Q8_0,
@ -646,19 +642,12 @@ static std::unordered_map<std::string, ggml_type> target_bpw_type(
constexpr ggml_type iq_quants[] = {
GGML_TYPE_IQ1_S,
GGML_TYPE_IQ1_M,
GGML_TYPE_IQ2_XXS,
GGML_TYPE_IQ2_XS,
GGML_TYPE_IQ2_S,
GGML_TYPE_IQ3_XXS,
GGML_TYPE_IQ3_S,
GGML_TYPE_IQ4_XS,
GGML_TYPE_IQ4_NL,
// TODO: add higher-precision fallbacks for IQ mixes to improve ppl if bpw budget allows it?
GGML_TYPE_Q5_0,
GGML_TYPE_Q5_1,
GGML_TYPE_Q5_K,
GGML_TYPE_Q6_K
GGML_TYPE_Q6_K,
GGML_TYPE_Q8_0
};
auto tensor_bytes = [](const ggml_tensor * t, const ggml_type typ) -> size_t {
@ -888,8 +877,8 @@ static std::unordered_map<std::string, ggml_type> target_bpw_type(
}
}
// abias_lambda djusts the trade-off between systematic bias (introduced by block‑wise scaling) and MSE
// larger value favours quantisation types that produce a smaller bias even if the MSE is slightly larger
// bias_lambda adjusts the trade-off between systematic bias (introduced by block‑wise scaling) and MSE
// larger value favours quantisation types that produce smaller bias even if the MSE is slightly larger
constexpr float bias_lambda = 1.5f;
constexpr double epsilon = 1e-12;
double err_num = weighted_mse;