In order to inform and ensure a good collaboration between dScience Digital Resources and the research environment at UiO, we will invite you to regular meetings.
This time, Ole Saastad (Chief Engineer, USIT) will talk about computational performance challenges. The talk deals with the problem of data within a modern supercomputer. While the performance without data might be excellent and even higher that the top 500 result indicate and close to marketing numbers, the reality is more pedestrian. How did we arrive here?
Saastad will explain in a bit of detail while the data transfer from memory to the processing units within the CPU are so slow and what kind of memory layout and access can impact the performance. He will also explain why flipping a single bit incurs the transfer of a total of 1024 bits.
Some knowledge of computer architecture and programming is beneficial to fully understand this lecture. The message to take home is simple enough, ?all (almost) scientific applications are memory bandwidth bound?.
Follow the webinar on zoom here.
Hope to see you there!