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llama.cpp 修復 qkx3 量化縮放搜尋的非法舍入

llama.cpp releases10/3 02:58版本更新開發工具開源地端推論

llama.cpp 合併 PR #29817,在 qkx3 量化級別送入 nearest_int 前先鉗制到 [0, nmax],避免 imatrix 縮放搜尋產生無窮、NaN 或越界值時觸發 Debug 建置斷言。該問題由 #29804 報告,修復同時為 q2_K、q4_K、q5_K、q4_1、q5_1 的退化 imatrix 分組補充迴歸測試。合法範圍內的取值行為不變,macOS Apple Silicon(arm64)等預編譯包已隨本次發布更新。

本地用 llama.cpp 在 Apple Silicon 上跑量化模型時,這個修復能避免退化 imatrix 分組導致的量化崩潰或斷言失敗,建議更新到含該提交的建置。

原標題:b11366
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原文

ggml-quants : avoid invalid rounding in qkx3 scale search ( #29817 ) ggml-quants : avoid invalid rounding in qkx3 scale search The imatrix scale search can produce an infinite, NaN, or otherwise out-of-range value when the fitted minimum collapses to the maximum or makes the range extremely small. That value is then passed to nearest_int and can trip its assertion in Debug builds. Clamp the quantization level to [0, nmax] before rounding so valid in-range values behave the same as before while invalid scale-search results no longer reach nearest_int. Add regression coverage for degenerate imatrix groups across q2_K, q4_K, q5_K, q4_1, and q5_1. Fixes #29804 . Assisted-by: Claude Opus 5.5 tests: print degenerate imatrix quant types Website: https://llama.app Attestations: https://github.com/ggml-org/llama.cpp/attestations/52340657 macOS/iOS: macOS Apple Silicon (arm64) macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED macOS Intel (x64) iOS XCFramework Linux: Ubuntu x64 (CPU) Ubuntu arm64 (CPU) Ubuntu s390x (CPU) Ubuntu x64 (Vulkan) Ubuntu arm64 (Vulkan) Ubuntu x64 (CUDA 12) - CUDA 12.8 libraries Ubuntu x64 (CUDA 13) - CUDA 13.4 libraries Ubuntu arm64 (CUDA 13) - CUDA 13.4 libraries Ubuntu x64 (ROCm 10.0) Ubuntu x64 (OpenVINO) Ubuntu x64 (SYCL FP32) Ubuntu x64 (SYCL FP16) Linux arm64 (Snapdragon: CPU, Adreno GPU, Hexagon NPU) - setup guide Android: Android arm64 (CPU) Android arm64 (Snapdragon: CPU, Adreno GPU, Hexagon NPU) - setup guide Windows: Windows x64 (CPU) Windows arm64 (CPU) Windows arm64 (OpenCL Adreno) Windows x64 (CUDA 12) - CUDA 12.4 DLLs Windows x64 (CUDA 13) - CUDA 13.4 DLLs Windows arm64 (CUDA 13) - CUDA 13.4 DLLs Windows x64 (Vulkan) Windows x64 (OpenVINO) Windows x64 (SYCL) Windows x64 (ROCm 10.0) openEuler: DISABLED openEuler x86 (310p) openEuler x86 (910b, ACL Graph) openEuler aarch64 (310p) openEuler aarch64 (910b, ACL Graph) UI: UI

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