Supercomputers/Systems/Atlas (Petrobras)
Brazil · operational · hpc
Atlas (Petrobras)
Also known as Atlas
Operated by Petrobras at Cenpes .
Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- 4.38 PFlop/s
- Rpeak
- 8.85 PFlop/s
- Rmax ÷ Rpeak
- 49.5%
- Cores
- 91,936
- Power
- 546.58 kW
- Per watt
- 8.0 GF/W
Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.
What this machine is made of
One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.
| Role | Part | Supplier at build | Quantity | Confidence | Source |
|---|---|---|---|---|---|
| Integrator | - Bull 4029GP-TVRT | Bull | - | Reported | top500.org |
| Accelerator | NVIDIA Tesla V100 Accelerators CUDA (Volta GV100) · 5,120C · 1.53 GHz · 12 nm · 300 W NVIDIA Tesla V100 | NVIDIA | - | Reported | top500.org |
| CPU | - Xeon Gold 6240 18C 2.6GHz | Intel | - | Reported | top500.org |
| Interconnect | Mellanox InfiniBand EDR Interconnect Fat tree · 100 Gb/s per 4x port · About 0.9 microseconds Infiniband EDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.org |
The read
Petrobras's 2020 Bull 4029GP-TVRT cluster of Xeon Gold 6240 (18-core, 2.6 GHz) CPUs with NVIDIA Tesla V100 GPUs on InfiniBand EDR running CentOS, 91,936 cores at 4.38 PFlop/s Rmax and 8.85 PFlop/s Rpeak on 547 kW. Debuted at rank 56 on the June 2020 list and stood at rank 324 on June 2026. Petrobras's 2024 procurement notice says Fenix, Atlas and Dragao will be decommissioned once the new primary machine is operational, and Harpia (already in this dataset) is that replacement, but Atlas was still on the June 2026 TOP500, which is the basis for the operational status. The Cenpes location is taken from Petrobras's coverage of its research-centre machines, not from TOP500 itself.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-02 Added Atlas, Petrobras's 2020 V100 cluster, 56th on the June 2020 TOP500
Source check
We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.
| Cited source | Result | Found on the page |
|---|---|---|
| top500.org | names system and part | NVIDIA Tesla V100, Mellanox InfiniBand EDR |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.