Huge embedding tables in modern deep learning recommender models (DLRM) require prohibitively large memory during training and inference. This paper proposes FIITED, a system to automatically reduce the memory footprint via FIne-grained In-Training Embedding Dimension pruning. By leveraging the key insight that embedding vectors are not equally important, FIITED adaptively adjusts the dimension of each individual embedding vector during model training, assigning larger dimensions to more important embeddings while adapting to dynamic changes in data. We prioritize embedding dimensions with higher frequencies and gradients as more important. To enable efficient pruning of embeddings and their dimensions during model training, we propose an embedding storage system based on virtually-hashed physically-indexed hash tables. Experiments on two industry models and months of realistic datasets show that FIITED can reduce DLRM embedding size by more than 65’ while preserving model quality, outperforming state-of-the-art in-training embedding pruning methods and increasing the reduction ratio by 1.3× to 1.67×. On public datasets, FIITED can reduce the size of embedding tables by 2.2× to 800× with negligible accuracy drop, achieving 1.05× to 12.5× improvement in reduction ratio compared to baselines while improving model throughput.

Tensor compilers play a critical role in optimizing deep neural networks (DNNs), with memory performance emerging as a key bottleneck in code generation for DNN models. Existing tensor compilers are constrained by inefficient auto-tuning algorithms. They either must deploy coarse-grained descriptions, thus miss potential optimization, or struggle with vast search spaces, rendering auto-tuning inapplicable. Tensor compilers require a more holistic optimization of memory performance to overcome these constraints. To address this issue, we focus our optimization objective on memory performance, which allows us to design monotonic optimization methods, significantly enhancing the efficiency of auto-tuning and thus enabling auto-tuning on a fine-granularity description. Based on these observations, we propose IntelliGen, a tensor compiler with instruction-level auto-tuning and monotonic memory optimization. We design an instruction-level graph description, and a monotonic optimization method for optimization on . Benefiting from auto-tuning techniques with fine-grained description, IntelliGen demonstrates significant speedup of up to 3.13×, 3.55×, and 16.9× (averaging 1.46×, 1.85×, and 2.30×, respectively) on NVIDIA GPUs, AMD GPUs, and Cambricon MLUs over the most efficient existing frameworks.

Large language models (LLMs) have facilitated a wide range of applications with distinct service-level objectives (SLOs), from latency-sensitive online tasks like interactive chatbots to throughput-oriented offline workloads like data synthesis. The existing deployment model, which dedicates machines to each workload, simplifies SLO management but often leads to poor resource utilization. This paper introduces HyGen, an interference-aware LLM serving system that enables efficient co-location of online and offline workloads while preserving SLOs. HyGen incorporates two key innovations: (1) performance control mechanisms, including a latency predictor to estimate batch execution time and an SLO-aware profiler to quantify latency interference, and (2) SLO-aware offline scheduling policies that maximize serving throughput and prevent starvation. Our evaluation on production workloads shows that HyGen achieves up to 3.9-5.8× throughput gains over online and hybrid serving baselines, while ensuring latency SLOs. The code of HyGen is publicly available at https://github.com/UIUC-MLSys/HyGen.