Summit
Summit was built by IBM and operated by Oak Ridge National Laboratory in United States. It topped the TOP500 for 4 consecutive lists, reaching 148.60 PFlop/s.
Peak Rmax
148.60 PFlop/s
Cores
2,414,592
Vendor
IBM
Country
United States
How it was built
- Architecture
- IBM Power System AC922
- Node
- Two IBM POWER9 CPUs with six NVIDIA Volta GPUs
- CPU–GPU interconnect
- NVLink, with coherent memory across the node
- System interconnect
- Dual-rail Mellanox EDR 100G InfiniBand, non-blocking
- Cabinets
- 256
- Storage
- 250 PB at 2.5 TB/s, GPFS
- Summit returned the top spot to the United States in 2018 after five years of Chinese machines leading the list.
- Its coherent memory across CPU and GPU made it an early favourite for scientific workloads that had struggled to use accelerators.
Detail drawn from Oak Ridge Leadership Computing Facility.
Time at number one
| List | Rmax | Cores |
|---|---|---|
| June 2018 | 122.30 PFlop/s | 2,282,544 |
| November 2018 | 143.50 PFlop/s | 2,397,824 |
| June 2019 | 148.60 PFlop/s | 2,414,592 |
| November 2019 | 148.60 PFlop/s | 2,414,592 |