Talk by Dr. Toshiyuki Imamura (R-CCS)

Speaker:
Dr. Toshiyuki Imamura (R-CCS)
https://www.r-ccs.riken.jp/labs/lpnctrt/en/

Title:
The Evolution of High Precision and Low Precision Computing in HPC

Abstract:
Although computational speed and computational accuracy are considered to be conflicting issues, in recent years, the diversity of hardware and the high productivity of software have allowed users to choose the precision within the requirement of appropriate computational accuracy. These are enormously changing scientific and technical computing, whereas it has been dominated by double-precision calculation for a long time.

There are two main ideas to keep the quality of calculation accuracy at a constant level.
One is to improve the quality of calculations to a high degree of accuracy while using low-precision arithmetic, and the second is to use higher-precision arithmetic and round off at the end.
Both are essential and practical to the modern processor systems.

In the seminar, I will introduce the recent topics such as the relationship between high performance and precision, and the relationship between modern hardware and computation accuracy, mainly focusing on the numerical libraries developed by the Imamura team in the above topics.