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Author

Gustavo Alonso

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Book Open access Sep 2026

Analysis of shared memory between CPUs and GPUs

This work investigates the memory capabilities of the NVIDIA DGX Spark, a novel platform featuring a unified memory architecture where DDR memory is located on the CPU and is fully accessible from the GPU.

Silvia R. Alcaraz, S. Hepkema, Vasilis Mageirakos et al. · 0 citations
Jul 2026

Eiger: An Efficient Library for GPU-based Data Analytics

Eiger is presented, a high-performance library for GPU-based data analytics that improves single-GPU query processing through runtime workload adaptivity and provides multiple implementation variants and tunable knobs for most operators.

Bo-Wen Wu, Marko Kabić, S. Hepkema et al. · 0 citations
Preprint Aug 2026

Oasis: Hiding the Cost of Querying Parquet Files in the Datapath

Oasis is a data-processing SmartNIC that offloads Parquet decoding into the network datapath as a custom hardware accelerator, and shows that Oasis hides the cost of Parquet decoding behind the network datapath with minimal overhead, overlapping the scan with the remainder of the query execution.

Jonas Dann, Luca Tagliavini, Gustavo Alonso · 0 citations
Preprint Aug 2026

Over the Memory Wall, Into the Instruction Wall: The New Bottleneck in GPU Data Processing

Valk, a performance analysis tool that combines data from multiple profilers, shows that when memory bandwidth is increased, kernels become compute bound, and makes three recommendations to fully utilize the GPUs' potential for relational workloads when the memory wall is removed.

S. Hepkema, Bo-Wen Wu, Christos Kozyrakis et al. · 0 citations

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