Assistant Professor Kazuya Yamazaki Receives IPSJ Computer Science Research Award for Young Scientists
6 Aug. 2025
Assistant Professor Kazuya Yamazaki of the Supercomputing Reserch Division at the Information Technology Center, The University of Tokyo, has been awarded the 2025 Information Processing Society of Japan(IPSJ) Computer Science Research Award for Young Scientists. This award is presented to young members who have delivered outstanding research presentations at conferences or symposiums organized by groups within the computer science research field.
Dr. Yamazaki received the award for his presentation titled “Effective Utilization of Host CPU Cores in GPU-Accelerated Weather Simulation Code” at the 198th High Performance Computing and 14th Quantum Software Joint Research Presentation Meeting held in March 2025.
The reasons for the recommendation are as follows:
“In high-performance computing systems equipped with GPUs, which have become increasingly common in recent years, it is typical to offload all processing to the GPU to minimize CPU-GPU communication. However, this approach often leaves CPU cores underutilized. In this study, the author proposed a method to run GPU-accelerated weather code—developed using OpenACC—concurrently on idle CPU cores by assigning part of the computational domain to the CPU. This approach improved performance of the simulation code on GH200 processors by approximately 25%. The achievement leverages OpenACC’s capability to run the same code on both CPU and GPU, and was realized by modifying only the intercomponent communication parts. This means the method can be applied to a wide range of applications at relatively low cost, potentially leading to performance improvements. Therefore, this work is deemed worthy of the IPSJ Computer Science Research Award for Young Scientists.”
The award ceremony was held at the 200th High Performance Computing Research Presentation Meeting (SWoPP2025) in August 2025.
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| Photo taken at the award celemony in SWoPP2025 | |
