September 2025 monthly summary for ggml-org/llama.cpp (Kleidiai backend). Focused on FP16 performance improvements and backend robustness. Key deliverables include generalizing the FP16 compute path and optimizing synchronization/work-size handling, as well as a targeted bug fix to improve backend reliability. These changes enhance FP16 tensor throughput, reduce synchronization overhead, and provide a more flexible and dependable Kleidiai integration for production workloads.

August 2025 monthly performance summary: Delivered reliability and performance improvements across two primary repos. Key outcomes include: (1) bug fixes for unsigned overflow in Kleidiai tensor processing with proper thread/workload calculation; (2) Kleidiai library upgrade to v1.13.0 in ggml-org/llama.cpp enabling performance enhancements; (3) robustness improvements in whisper.cpp tensor processing preventing overflows and improving thread/column handling. Business value: higher throughput, reduced risk of edge-case failures, and a stronger base for scalable inference.

July 2025: Focused on enabling efficient, row-level access for quantized models across Whisper.cpp and Llama.cpp. Implemented Get Rows operation with CPU buffer validation, KleidiAI backend support for quantized get_rows (Q4_0) with dequantization, and added Kleidiai get_rows for row retrieval in quantized tensors. These workstreams improve data access latency, model versatility, and robustness in production workloads.

June 2025 performance summary: Delivered cross-platform GGML CPU backend support for Android and Apple Silicon across llama.cpp and whisper.cpp, enabling builds and optimized runs on mobile and Apple devices. This includes Android ARM and Apple Silicon variants to leverage platform-specific instruction sets for on-device inference. Implemented alongside KleidiAI v1.9.0 upgrades across both projects, with updated CMake fetch logic and MD5 checksums to ensure reproducible builds and integrity verification. These changes reduce deployment friction, improve on-device latency, and strengthen cross-platform readiness for mobile and desktop deployments. Technologies demonstrated include CMake-based dependency management, ARM/Apple Silicon optimizations (DOTPROD, MATMUL_INT8, NOSVE, SME), and build-time integrity checks.

February 2025: Delivered CPU-based KleidiAI backends for two major projects, enabling on-device inference with optimized kernels and configurable runtime parameters. Implemented environment-variable configuration and LHS multithreading enhancements in llama.cpp, and integrated ARM-optimized KleidiAI kernels in ggml-cpu for whisper.cpp with updated build tooling. These changes expand hardware support, improve performance, and lay groundwork for scalable deployment across devices, reducing cloud compute dependency and enabling faster user experiences.

Month: 2024-11 – Delivered ARM64/AArch64 architecture support and performance optimizations in two critical repos (Mintplex-Labs/whisper.cpp and ggml-org/llama.cpp) to accelerate inference on Apple Silicon and improve macOS build reliability. The work focuses on online flow for AArch64 GEMV/GEMM kernels, targeted CPU feature checks, and tensor optimizations, aligning capabilities across projects for stronger performance on ARM64 hardware.