multi-GPU
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Llama.cpp vs Ollama: Code Generation Throughput
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A notable performance discrepancy has been observed between llama.cpp and Ollama in terms of code generation throughput when running the Qwen-3 Coder 32B model locally. The analysis reveals that llama.cpp achieves approximately 70% higher throughput compared to Ollama, despite both using the same model weights and hardware. Potential reasons for this difference include variations in CUDA kernels, attention implementations, context or batching defaults, scheduler or multi-GPU utilization, and overhead from Ollama's runtime or API layer. Understanding these differences is crucial for optimizing performance in machine learning applications. This matters because optimizing code generation throughput can significantly impact computational efficiency and resource utilization in AI model deployment.
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Multi-GPU Breakthrough with ik_llama.cpp
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The ik_llama.cpp project has made a significant advancement in local LLM inference for multi-GPU setups, achieving a 3x to 4x performance improvement. This breakthrough comes from a new execution mode called split mode graph, which allows for the simultaneous and maximum utilization of multiple GPUs. Previously, using multiple GPUs either pooled VRAM or offered limited performance scaling, but this new method enables more efficient use of resources. This development is particularly important as it allows for leveraging multiple low-cost GPUs instead of relying on expensive high-end enterprise cards, making it more accessible for homelabs, server rooms, or cloud environments.
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LLM Engineering Certification by Ready Tensor
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The Scaling & Advanced Training module in Ready Tensor’s LLM Engineering Certification Program emphasizes the use of multi-GPU setups, experiment tracking, and efficient training workflows. This module is particularly beneficial for those aiming to manage larger machine learning models while keeping computational costs under control. By focusing on practical strategies for scaling, the program helps engineers optimize resources and improve the performance of their models. This matters because it enables more efficient use of computational resources, which is crucial for advancing AI technologies without incurring prohibitive costs.
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Solving Large-Scale Linear Sparse Problems with cuDSS
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The NVIDIA CUDA Direct Sparse Solver (cuDSS) is designed to tackle large-scale linear sparse problems in fields like Electronic Design Automation (EDA) and Computational Fluid Dynamics (CFD), which are becoming increasingly complex. cuDSS offers unprecedented scalability and performance by allowing users to run sparse solvers at a massive scale with minimal code changes. It leverages hybrid memory mode to utilize both CPU and GPU resources, enabling the handling of larger problems that exceed a single GPU's memory capacity. This approach allows for efficient computation even for problems with over 10 million rows and a billion nonzeros, by using 64-bit integer indexing arrays and optimizing memory usage across multiple GPUs or nodes. Hybrid memory mode in cuDSS addresses the memory limitations of a single GPU by using both CPU and GPU memories, albeit with a trade-off in data transfer time due to bus bandwidth. This mode is not enabled by default, but once activated, it allows the solver to manage device memory automatically or with user-defined limits. The performance of hybrid memory mode is influenced by the CPU/GPU memory bandwidth, but modern NVIDIA driver optimizations and fast interconnects help mitigate these impacts. By setting memory limits and utilizing the maximum GPU memory, users can achieve optimal performance, making it possible to solve larger problems efficiently. For even larger computational tasks, cuDSS supports multi-GPU mode (MG mode) and Multi-GPU Multi-Node (MGMN) mode, which allow the use of all GPUs in a node or across multiple nodes, respectively. MG mode simplifies the process by handling GPU communications internally, eliminating the need for developers to manage distributed communication layers. MGMN mode, on the other hand, requires a communication layer like Open MPI or NCCL, enabling the distribution of computations across multiple nodes. These modes allow for solving massive problems or speeding up computations by utilizing more GPUs, thereby accommodating the growing size and complexity of real-world problems. This matters because it provides a scalable solution for industries facing increasingly complex computational challenges.