Supercomputers/Systems/Tera-100
France · decommissioned · classified
Tera-100
Also known as Bull bullx super-node at CEA
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
- 1.05 PFlop/s
- Rpeak
- 1.25 PFlop/s
- Rmax ÷ Rpeak
- 83.7%
- Cores
- 138,368
- Power
- 4.59 MW
- Per watt
- 0.2 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 bullx super-node S6010/S6030 | Bull | - | Reported | top500.org |
| CPU | - Xeon X7560 8C 2.26GHz | Intel | - | Reported | top500.org |
| Interconnect | Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port Infiniband QDR | NVIDIA | - | Reported | top500.org |
The read
Bull's third-stage Tera machine for CEA/DAM nuclear simulation, called Europe's first petascale supercomputer by CEA. TOP500 lists 138,368 Xeon X7560 8-core 2.26 GHz cores on InfiniBand QDR, sixth on the November 2010 list and last present on the June 2019 list. CEA says it has had over a petaflop of capacity since October 2010 and that Tera1000 followed from late 2015. No page we fetched gives a shutdown date, so none is recorded and the decommissioned status rests on its disappearance from the list and the Tera1000 succession. TOP500 is the only source for Rmax, Rpeak, cores and power, so the tier is reported.
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 Tera-100, CEA's Bull petascale machine, sixth on the November 2010 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 | Mellanox InfiniBand QDR |
| www-hpc.cea.fr | names system only | - |
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.